Through-hole Technology (THT)

Through-hole Technology (THT)
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Alpha FLA Series

The FLA conformally coated resistor series from Alpha Electronics offers a very precise resistor with a resistance range from 10Ω up to 100kΩ all in a small through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Conformally coated through-hole resistor
  • Available in any resistance between 10Ω and 100kΩ
  • Tight tolerance options as low as ±0.05% available for resistances between 100Ω and 100kΩ
  • Tight TCR options available of ±2.5 ppm/°C or ±5 ppm/°C (from -25°C up to +125°C)
  • Maximum working voltage of 250V
  • Power rating of 0.125W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -25°C up to +155°C

The Alpha Electronics FLA precision resistor series have been designed with terminals that are easy for insertion into the PCB.

The FLB series has a pin pitch of 2.54 ±0.25mm.

Alpha's Bulk Metal® foil resistor technology means that these conformally coated, through-hole, precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

The below table gives the full specifications for each resistor model available including the Alpha FLA series:

Alpha FLA Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring at the point 2.5 ±1.0mm below the shoulder of the leads

£0.00 Ex Tax: £0.00

Alpha FLB Series

The FLB conformally coated resistor series from Alpha Electronics offers a very precise resistor with a resistance range from 10Ω up to 150kΩ all in a small through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Conformally coated through-hole resistor
  • Available in any resistance between 10Ω and 150kΩ
  • Tight tolerance options as low as ±0.05% available for resistances between 100Ω and 150kΩ
  • Tight TCR options available of ±2.5 ppm/°C or ±5 ppm/°C (from -25°C up to +125°C)
  • Maximum working voltage of 300V
  • Power rating of 0.25W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -25°C up to +155°C

The Alpha Electronics FLB precision resistor series have been designed with terminals that are easy for insertion into the PCB.

The FLB series has a pin pitch of 2.54 ±0.25mm.

Alpha's Bulk Metal® foil resistor technology means that these conformally coated, through-hole, precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

The below table gives the full specifications for each resistor model available including the Alpha FLB series:

Alpha FLB Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring at the point 2.5 ±1.0mm below the shoulder of the leads

£0.00 Ex Tax: £0.00

Alpha FLC Series

The FLC conformally coated resistor series from Alpha Electronics offers a very precise resistor with a resistance range from 10Ω up to 200kΩ all in a small through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Conformally coated through-hole resistor
  • Available in any resistance between 10Ω and 200kΩ
  • Tight tolerance options as low as ±0.05% available for resistances between 100Ω and 200kΩ
  • Tight TCR options available of ±2.5 ppm/°C or ±5 ppm/°C (from -25°C up to +125°C)
  • Maximum working voltage of 300V
  • Power rating of 0.25W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -25°C up to +155°C

The Alpha Electronics FLC precision resistor series have been designed with terminals that are easy for insertion into the PCB.

The FLC series has a pin pitch of 5.08 ±0.25mm.

Alpha's Bulk Metal® foil resistor technology means that these conformally coated, through-hole, precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

The below table gives the full specifications for each resistor model available including the Alpha FLC series:

Alpha FLC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring at the point 2.5 ±1.0mm below the shoulder of the leads

£0.00 Ex Tax: £0.00

Alpha HC Series

The HC resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package. With a resistance range from 1Ω up to 120kΩ all in a small through-hole package with a pin pitch of 3.81 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 1Ω and 120kΩ
  • Through-hole package with a pin pitch of 3.81 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 120kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω and 120kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HC hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HC series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7 ±3.2mm away from the base for type HC and HD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha HD Series

The HD resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package. With a resistance range from 1Ω up to 120kΩ all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 1Ω and 120kΩ
  • Through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 120kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω up to 120kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HD hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HD series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type HC and HD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha HG Series

The HG resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package. With a resistance range from 1Ω up to 10kΩ all in a four-terminal (Kelvin) connection design through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 1Ω and 10kΩ
  • Through-hole package with four-terminal (Kelvin) connection design
  • Tight tolerance options as low as ±0.005% available for resistances between 10Ω and 10kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C) or ±2.5 ppm/°C (from -55°C up to +125°C)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HG hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HG series:

Alpha HG Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type HC and HD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha HK Series

The HK resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package all with a zero-TCR. With a resistance range from 100Ω up to 100kΩ all in a small through-hole package with a pin pitch of 3.81 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with a zero-TCR (0±15 ppm/°C between 0°C and +50°C) and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 100Ω and 100kΩ
  • Through-hole package with a pin pitch of 3.81 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Characteristic S Zero-TCR (0±15 ppm/°C from 0°C and +50°C)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HK hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HK series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are obtained by measuring the leads at point 12.7 ±3.2mm away from the root

£0.00 Ex Tax: £0.00

Alpha HL Series

The HL resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package all with a zero-TCR. With a resistance range from 100Ω up to 100kΩ all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with a zero-TCR (0±15 ppm/°C between 0°C and +50°C) and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 100Ω and 100kΩ
  • Through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Characteristic S Zero-TCR (0±15 ppm/°C from 0°C up to +50°C)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HL hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HL series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are obtained by measuring the leads at point 12.7 ±3.2mm away from the root

£0.00 Ex Tax: £0.00

Alpha MA Series

The MA ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 1Ω up to 200kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 3.81 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 1Ω and 200kΩ
  • Through-hole package with a pin pitch of 3.81 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 200kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω up to 200kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω up to 200kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C) or 0.2W (at 150kΩ or above)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

The below table gives the full specifications for each resistor model available including the Alpha MA series:

Alpha MA Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha MB Series

The MB ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 5Ω up to 400kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 7.5 ±0.5mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 1Ω and 200kΩ
  • Through-hole package with a pin pitch of 7.5±0.5mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 400kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 400kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω and 400kΩ)
  • Maximum working voltage of 350V
  • Power rating of 0.5W (at +125°C) or 0.3W (at 200kΩ or above)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

The below table gives the full specifications for each resistor model available including the Alpha MB series:

Alpha MB Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha MC Series

The MC ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 1Ω up to 200kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 1Ω and 200kΩ
  • Transfer moulded through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 200kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 200kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω and 200kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C) or 0.2W (at 150kΩ or above)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

The below table gives the full specifications for each resistor model available including the Alpha MC series:

Alpha MC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha MD Series

The MD ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 5Ω up to 80kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 5Ω and 80kΩ
  • Transfer moulded through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 80kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 100Ω and 80kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω and 80kΩ)
  • Maximum working voltage of 250V
  • Power rating of 0.125W (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

The below table gives the full specifications for each resistor model available including the Alpha MD series:

Alpha MD Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha PB Series

The PB ultra-precision through-hole power resistor series from Alpha Electronics offers a power rating of up to 10W on a heat sink using the mounting tabs provided or 2W in free air (at 25°C) with a wide resistance range from 0.4Ω to 50kΩ. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 1Ω and 50kΩ as well as tight tolerances down to ±0.01% between 50Ω and 50kΩ.

  • Ultra-precision through-hole power resistor
  • Each resistor is available in any resistance between 0.4Ω and 50kΩ
  • 2-Terminal through-hole case-encapsulated package with heat sink mounting
  • Power rating of 10W on a heat sink or 2W in free air at +25°C
  • Tight tolerances as low as ±0.01% available between 50Ω and 50kΩ
  • Tight TCR available of ±2.5 ppm/°C between 1Ω and 50kΩ
  • Maximum working voltage of 750V
  • Maximum working current of 5A
  • Maximum rated operating temperature +25°C
  • Working temperature from -55°C up to +155°C

The PB case-encapsulated, through-hole, ultra-precision power resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision and high power applications.

Pin pitch for the Alpha PB series is 15.0 ±0.5mm.

The below table gives the full specifications for each resistor model available including the Alpha PB series:

Alpha PB Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures for type PB are the values obtained by measuring the leads at point 12.7±3.2mm away from the root, but in case of resistance value below 10Ω, the values at 5.08 ±0.6mm away
** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00

Alpha PC Series

The PC ultra-precision through-hole power resistor series from Alpha Electronics offers 4-terminal (Kelvin) connection for current sensing and a power rating of up to 10W on a heat sink using the mounting tabs provided or 2W in free air (at 25°C) over the resistance range 0.002Ω to 100Ω. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 0.1Ω and 100Ω as well as tight tolerances down to ±0.01% between 25Ω and 100Ω.

  • Ultra-precision through-hole power resistor
  • Each resistor is available in any resistance between 0.002Ω and 100Ω
  • 4-Terminal (Kelvin) connection through-hole case-encapsulated package with heat sink mounting
  • Power rating of 10W on a heat sink or 2W in free air at +25°C
  • Tight tolerances as low as ±0.01% available between 25Ω and 100Ω
  • Tight TCR available of ±2.5 ppm/°C between 0.1Ω and 100Ω
  • Maximum working voltage of 750V
  • Maximum working current of 32A
  • Maximum rated operating temperature +25°C
  • Working temperature from -55°C up to +155°C

The PC case-encapsulated, through-hole, ultra-precision power resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision and high power applications.

Their 4-terminal design and high precision make them ideal for current sensing applications.

Pin pitch for the Alpha PC series is 15.0 ±0.5mm.

The below table gives the full specifications for each resistor model available including the Alpha PC series:

Alpha PC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures for type PB are the values obtained by measuring the leads at point 12.7±3.2mm away from the root, but in case of resistance value below 10Ω, the values at 5.08 ±0.6mm away
** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00

Alpha PD Series

The PD ultra-precision TO-220 through-hole power resistor series from Alpha Electronics offers a power rating of up to 8W on a heat sink or 1.5W in free air (at 25°C) over a wide resistance range of 0.1Ω to 10kΩ. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 5Ω and 10kΩ as well as tight tolerances down to ±0.02% between 25Ω and 10kΩ.

  • Ultra-precision through-hole power resistor
  • Each resistor is available in any resistance between 0.1Ω and 10kΩ
  • TO-220 through-hole package
  • Power rating of 8W on a heat sink or 1.5W in free air at +25°C
  • Tight tolerances as low as ±0.02% available between 25Ω and 10kΩ
  • Tight TCR available of ±2.5 ppm/°C between 5Ω and 10kΩ
  • Maximum working voltage of 250V
  • Maximum working current of 4A
  • Maximum rated operating temperature +25°C
  • Working temperature from -55°C up to +155°C

The PD ultra-precision power resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications. Their standard TO-220 package is commonly used for power semiconductor devices making them ideal for new power designs.

Pin pitch for the Alpha PD series is 5.08 ±0.5mm.

The below table gives a summary of the specifications and options available for the Alpha PD series:

Alpha PD Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 5.08 ±0.6mm away from the root
** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00