Through-hole Technology (THT)

Through-hole Technology (THT)

Browse wide range of through-hole (THT) High Voltage resistors from leading industry manufacturers at Rhopoint Components. Available with a wide range of votage ratings, power ratings, tolerances and other variables, we can find the right solution for your project, however big or small.


Can't find what you're looking for? Contact us, we can often offer customised solution to meet all your needs.

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Caddock MG Series

The MG precision high voltage axial resistor series from Caddock offers a voltage rating of up to 30kV (standard series) or 48kV (-15 variant), power rating of up 15W and a resistance range from 200Ω up to 2GΩ (standard series) or 10GΩ (extended range), all in a cylindrical axial leaded through-hole package. Caddock's Micronox® resistance films are the source of their outstanding combination of performance features. The MG series offers tolerances from ±1.0% down to ±0.1% across the standard series or ±1.0% for both -15 and extended ranges.

  • Cylindrical high voltage axial leaded resistor
  • Available in any resistance between 200Ω and 10GΩ (Extended range, 2GΩ standard series)
  • Utilises Caddock's Micronox® resistance film technology
  • Excellent long-term stability
  • TCR for standard resistance range of ±80 ppm/°C in combinations with resistance tolerances as tight as ±0.1%
  • Majority of models are manufactured with Caddock's non-inductive design, other models offer low inductance
  • Maximum operating voltage from 600V up to 30kV
  • -15 variant increases the maximum operating voltages by 60% (48kV for the MG815-15 model)
  • Maximum power rating from 0.5W (MG650 model) up to 15W (MG815 model)
  • MG resistors have demonstrated stability of 0.01% per 1,000 hours in extended load life testing of standard resistance range values

The exceptional performance of the Caddock MG series has been proven through many years of use in equipment that demands the highest reliability and stability, including TWT amplifiers, X-ray systems, geophysical instruments and medical electronics.

Most models of the MG series are manufactured with Caddock's non-inductive design which uses a serpentine resistive pattern that provides for neighbouring lines to carry current in opposite directions, thereby achieving maximum cancellation of flux fields over the entire length of the resistor. The efficient non-inductive construction is accomplished without derating of any performance advantages.

Additional options to the standard resistor range includes extended resistance values and the -15 option for increased maximum operating voltages.

The below table gives the specifications available for the complete MG resistor series:

Caddock MG Specifications

Caddock MM SpecificationsModels with low inductance construction are in shaded areas

Caddock MM Specifications Models with Caddock's non-inductance resistance pattern are in non-shaded areas

£0.00 Ex Tax: £0.00

Caddock ML Series

The ML high temperature precision axial leaded resistor series from Caddock offers a resistance range from 50Ω up to 5MΩ, a power rating of up to 0.6W (ML181 model) and a voltage rating of up to 600V (ML181 model). The ML series has a tolerance of ±1.0% as standard, with options down to ±0.1% on special order, and also a TCR of ±50 ppm/°C (between -15°C and +105°C). These resistors are produced with Caddock's proven Micronox® resistance films.

  • High temperature high voltage precision axial leaded resistor
  • Available in any resistance between 50Ω and 5MΩ
  • Utilises Caddock's Micronox® resistance film technology
  • The ML181 model utilises Caddock's non-inductive design
  • Tolerance of ±1.0% as standard with options down to ±0.1% on special order
  • TCR of ±50 ppm/°C (between -15°C and +105°C)
  • Maximum working voltage of up to 600V (model dependent)
  • Maximum power rating of up to 0.6W (model dependent)
  • Maximum operating temperature to +175°C

Some models of the ML series are manufactured with Caddock's non-inductive design that provides for neighbouring lines to carry current in opposite directions. This efficient non-inductive construction is accomplished without derating of any performance advantages.

ML high temperature high voltage precision resistors have a proven performance history in industrial and military applications.

The below table gives the specifications available for the complete ML resistor series:

Caddock ML Specifications

Caddock MM SpecificationsModels with low inductance construction are in shaded areas

Caddock MM Specifications Models with Caddock's non-inductance resistance pattern are in non-shaded areas

The continuous maximum applied voltage cannot exceed the maximum power rating and is ohmic value dependent.
Value range is case size dependent.

£0.00 Ex Tax: £0.00

Caddock MM Series

The MM high temperature precision axial leaded resistor series from Caddock offers a resistance range from 30Ω up to 10MΩ, a power rating of up to 1W (MM215 model) and a voltage rating of up to 800V (MM215 model). The MM series has a tolerance of ±1.0% as standard, with options down to ±0.1% on special order, and also a TCR of ±50 ppm/°C (between -15°C and +105°C). These resistors are produced with Caddock's proven Micronox® resistance films.

  • High temperature high voltage precision axial leaded resistor
  • Available in any resistance between 30Ω and 10MΩ
  • Utilises Caddock's Micronox® resistance film technology
  • The MM215 model utilises Caddock's non-inductive design
  • Tolerance of ±1.0% as standard with options down to ±0.1% on special order
  • TCR of ±50 ppm/°C (between -15°C and +105°C)
  • Maximum working voltage of up to 800V (model dependent)
  • Maximum power rating of up to 1W (model dependent)
  • Maximum operating temperature to +275°C

Some models of the MM series are manufactured with Caddock's non-inductive design that provides for neighbouring lines to carry current in opposite directions. This efficient non-inductive construction is accomplished without derating of any performance advantages.

MM high temperature high voltage precision resistors have a proven performance history in industrial and military applications.

The below table gives the specifications available for the complete MM resistor series:

Caddock MM Specifications

Caddock MM SpecificationsModels with low inductance construction are in shaded areas

Caddock MM Specifications Models with Caddock's non-inductance resistance pattern are in non-shaded areas

The continuous maximum applied voltage cannot exceed the maximum power rating and is ohmic value dependent.
Value range is case size dependent.

£0.00 Ex Tax: £0.00

Caddock MX400 Series

Please be aware that this product is being made obsolete. The last time buy for the MX400 series is 30th September 2019 with a last ship date of December 31st 2019.

For replacements please see the RoHS compliant MX500 series or contact us for further details.

The MX400 series from Caddock are cost effective high voltage resistors for industrial and general purpose applications, with a resistance range from 1MΩ to 1000MΩ and a maximum operating temperature of +175°C. These resistors have a maximum power rating of up to 10W (MX485 model) and tolerance of ±1.0% standard. The MX resistors combine the proven performance of Caddock's Micronox® resistance system with new cost-efficient design elements and the non-inductive serpentine pattern with a patented, high through-put screen printed silicone coating. These resistors are intended for the design of high voltage systems where the system is not exposed to full military or space grade operating conditions.

  • High ohmic high voltage axial leaded through-hole resistor
  • Utilises Caddock's Micronox® resistance film
  • Resistance values available between 1MΩ and 1000MΩ
  • TCR ±80 ppm/°C (between 0°C and +70°C)
  • Tolerance of ±1.0% standard
  • Maximum power rating of up to 10W (MX485 model)
  • Maximum operating temperature +175°C
  • Five sizes and power ratings

For full military or space grade operating conditions, we recommend Caddock's TG Low TC precision high voltage resistors or MG precision high voltage resistors.

The below table gives the specifications available for the complete MX400 resistor series:

Caddock MX400 series Specifications

£0.00 Ex Tax: £0.00

Caddock MX500 Series

The MX500 series from Caddock are cost effective high voltage resistors for industrial and general purpose applications, with a resistance range from 1MΩ to 1000MΩ and a maximum operating temperature of +175°C. These parts are the RoHS equivalent to the Caddock MX400 series, they have a maximum power rating of up to 10W (MX585 model) and tolerance of ±1.0% standard. The MX500 resistors combine the proven performance of Caddock's Micronox® resistance system with new cost-efficient design elements and the non-inductive serpentine pattern coated with the high-quality, high-temperature black silicone conformal coating material. These resistors are intended for the design of high voltage systems where the system is not exposed to full military or space grade operating conditions.

  • High ohmic high voltage axial leaded through-hole resistor
  • Utilises Caddock's Micronox® resistance film
  • Coated with the high-quality, high-temperature black silicone conformal coating material
  • Lead wires feature Caddock's standard RoHS compliant axial lead resistor lead wire, a nickel clad copper wire with a thin gold plate
  • Resistance values available between 1MΩ and 1000MΩ
  • TCR ±80 ppm/°C (between 0°C and +70°C)
  • Tolerance of ±1.0% standard
  • Maximum power rating of up to 10W (MX585 model)
  • Maximum operating temperature +175°C
  • Five sizes and power ratings

For full military or space grade operating conditions, we recommend Caddock's TG Low TC precision high voltage resistors or MG precision high voltage resistors.

The below table gives the specifications available for the complete MX500 resistor series:

Caddock MX500 series Specifications

1. Power rating (wattage): maximum continuos power in free-air up to +70°C
2. Operating voltage (rms AC or DC): maximum continuos operating voltage applied in free-air up to +70°C, not to exceed rated power
3. Temperature coefficient: 80ppm/°C ref. to +25°C, ΔR taken at 0°C and +70°C

£0.00 Ex Tax: £0.00

Caddock TG Series

The TG series from Caddock are low TCR precision high voltage resistors, with a resistance range between 1MΩ and 1,000MΩ. They have a tolerance of ±1.0% (down to ±0.1% on special order) and the low TCR value is ±25 ppm/°C (between -55°C and +125°C). The TG series utilize Caddock's proven Tetrinox® resistance system to achieve the unique combination of low temperature coefficient (TCR) which minimizes the self-drift due to power dissipation warm-up and high stability performance at high operating voltages.

  • Precision high voltage axial leaded through-hole resistor
  • Resistance values available between 1MΩ and 1,000MΩ
  • TCR of ±25 ppm/°C (between -55°C and +125°C)
  • Tolerance of ±1.0% (down to ±0.1% on special order)
  • Maximum power rating of 6W (model dependent)
  • Load life stability to 0.25% per 1,000 hours at +125°
  • Maximum continuous operating temperature of +225°C
  • Maximum operating voltage from 4kV up to 30kV (standard series)
  • Utilises Caddock's Tetrinox® resistance technology
  • The -15 series increases the maximum voltage ratings by 60% (48kV for the TG1015 model)

The TG series from Caddock is designed to meet the demanding stability requirements of:

  • TWT power supplies
  • Electron microscopes
  • X-ray systems
  • High resolution CRT displays
  • Geophysical instruments

The below table gives the specifications available for the complete TG resistor series:

Caddock TG series Specifications

£0.00 Ex Tax: £0.00

Caddock USF240 Series

The USF240 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 50Ω and 10MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF240 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

  • Ultra-stable radial leaded film through-hole resistors
  • Resistance values available are between 50Ω and 10MΩ
  • TCR of ±2 ppm/°C
  • Tolerance of ±0.01% or ±0.1%
  • Operating temperature -40°C to +85°C
  • Maximum working voltage of 300V
  • Ceramic package provides cool operation
  • Maximum power rating of 0.33W at +85°C
  • Utilising Caddock's proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

  • Precise amplifier gain setting
  • Precise resistor bridge circuits
  • Precise transducer sense circuits
  • Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF240 model:

Caddock USF240 series Specifications

£0.00 Ex Tax: £0.00

Caddock USF270 Series

The USF270 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 990KΩ and 5MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF270 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

  • Ultra-stable radial leaded film through-hole resistors
  • Resistance values available are between 990KΩ and 5MΩ
  • TCR of ±2 ppm/°C
  • Tolerance of ±0.01% or ±0.1%
  • Operating temperature -40°C to +85°C
  • Maximum working voltage of 1,400V
  • Ceramic package provides cool operation
  • Maximum power rating of 0.75W at +85°C
  • Utilising Caddock's proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

  • Precise amplifier gain setting
  • Precise resistor bridge circuits
  • Precise transducer sense circuits
  • Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF270 model:

Caddock USF270 series Specifications

£0.00 Ex Tax: £0.00

Caddock USF271 Series

The USF271 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 9.9MΩ and 10MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF271 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

  • Ultra-stable radial leaded film through-hole resistors
  • Resistance values available are between 9.9MΩ and 10MΩ
  • TCR of ±2 ppm/°C
  • Tolerance of ±0.01% or ±0.1%
  • Operating temperature -40°C to +85°C
  • Maximum working voltage of 2,500V
  • Ceramic package provides cool operation
  • Maximum power rating of 0.75W at +85°C
  • Utilising Caddock's proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

  • Precise amplifier gain setting
  • Precise resistor bridge circuits
  • Precise transducer sense circuits
  • Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF271 model:

Caddock USF271 series Specifications

£0.00 Ex Tax: £0.00

Caddock USF340 Series

The USF340 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 50Ω and 20MΩ, low TCR of ±5 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF340 are constructed with an aluminum oxide ceramic sandwich which provides great thermal conductivity which very effectively minimizes the power coefficient drift. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

  • Ultra-stable radial leaded film through-hole resistors
  • Resistance values available are between 50Ω and 20MΩ
  • TCR of ±5 ppm/°C
  • Tolerance of ±0.01% or ±0.1%
  • Operating temperature -40°C to +85°C
  • Maximum working voltage of 300V
  • Ceramic package provides cool operation
  • Maximum power rating of 0.33W at +85°C
  • Utilising Caddock's proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

  • Precise amplifier gain setting
  • Precise resistor bridge circuits
  • Precise transducer sense circuits
  • Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF340 model:

Caddock USF340 series Specifications

£0.00 Ex Tax: £0.00

Caddock USF370 Series

The USF370 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 990KΩ and 10MΩ, low TCR of ±5 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF370 are constructed with an aluminum oxide ceramic sandwich which provides great thermal conductivity which very effectively minimizes the power coefficient drift. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

  • Ultra-stable radial leaded film through-hole resistors
  • Resistance values available are between 990KΩ and 10MΩ
  • TCR of ±5 ppm/°C
  • Tolerance of ±0.01% or ±0.1%
  • Operating temperature -40°C to +85°C
  • Maximum working voltage of 1,400V
  • Ceramic package provides cool operation
  • Maximum power rating of 0.75W at +85°C
  • Utilising Caddock's proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

  • Precise amplifier gain setting
  • Precise resistor bridge circuits
  • Precise transducer sense circuits
  • Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF370 model:

Caddock USF370 series Specifications

£0.00 Ex Tax: £0.00

Caddock USF371 Series

The USF371 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 19.8MΩ and 25MΩ, low TCR of ±5 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF371 are constructed with an aluminum oxide ceramic sandwich which provides great thermal conductivity which very effectively minimizes the power coefficient drift. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

  • Ultra-stable radial leaded film through-hole resistors
  • Resistance values available are between 19.8MΩ and 25MΩ
  • TCR of ±5 ppm/°C
  • Tolerance of ±0.01% or ±0.1%
  • Operating temperature -40°C to +85°C
  • Maximum working voltage of 2,500V
  • Ceramic package provides cool operation
  • Maximum power rating of 0.75W at +85°C
  • Utilising Caddock's proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

  • Precise amplifier gain setting
  • Precise resistor bridge circuits
  • Precise transducer sense circuits
  • Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF371 model:

Caddock USF371 series Specifications

£0.00 Ex Tax: £0.00

Caddock USFS Series

The USFS series from Caddock are high voltage, ultra stable, low TCR selected resistor sets. The resistance values available for the complete sets are 30MΩ, 50MΩ and 100MΩ all with a TCR of 2 ppm/°C and a tolerance of ±0.10% for each set. The USFS resistor sets are designed for use in high voltage systems that require the very best temperature and long term stability. These are manufactured with Caddock's Tetrinox® resistance film system, the individual resistors that form these sets are individually characterised using automated data acquisition systems and then selected to form a set resistance.

  • Ultra-stable radial leaded film through-hole resistor sets
  • Sets are available with either 3 or 5 selected USF300 series resistors (model dependent)
  • Resistance values available for the complete sets are 30MΩ, 50MΩ and 100MΩ
  • TCR for the complete sets of ±2 ppm/°C
  • Tolerance for the complete sets of ±0.1%
  • Operating temperature -40°C to +85°C
  • Voltage coefficient as low as 0.005 ppm/V per resistor set (model dependent)
  • Ceramic package provides cool operation
  • Multiple USFS selected resistor sets can be used in series to achieve higher total resistances and higher voltage ratings
  • Utilising Caddock's Tetrinox® resistance film systems

Multiple USFS selected resistor sets can be used in series to form a string of resistors that achieve a higher total resistance and a higher voltage rating with 2 ppm/°C overall temperature coefficient.

The below table gives the specifications available for the complete USFS series:

Caddock USFS series Specifications

* Please see the datasheet for the specification notes.

£0.00 Ex Tax: £0.00

Caddock USG1105 Series

The USG1105 series from Caddock are ultra-stable precision high voltage resistors. The resistance values available are 50MΩ and 75MΩ with a TCR of 10 ppm/°C or 20 ppm/°C and a tolerance of ±0.10% or ±0.20% depending on the resistance value required. The USG1105 series from Caddock uses the Tetrinox® resistance film system and was developed to optimise low temperature coefficient performance and long term stability performance.

  • Ultra-stable precision high voltage axial leaded film through-hole resistors
  • Resistance values available are 50MΩ and 75MΩ
  • TCR of 10 ppm/°C or 20 ppm/°C depending on the resistance value required
  • Tolerance of ±0.1% or ±0.2% depending on the resistance value required
  • Operating temperature -40°C to +85°C
  • Maximum voltage rating 5KV
  • Typical load life stability 0.025% per 1,000 hours
  • Utilising Caddock's Tetrinox® resistance film systems

The low TCR of the Type USG1105 resistors minimizes temperature related drift due to temperature gradients that may exist due to the placement of the resistor components in the high voltage assembly

The below table gives the specifications available for the USG1105 series:

Caddock USG1105 series Specifications

* Please see the datasheet for the specification notes.

£0.00 Ex Tax: £0.00

Caddock USG1110 Series

The USG1110 series from Caddock are ultra-stable precision high voltage resistors. The resistance values available are 100MΩ and 150MΩ with a TCR of 10 ppm/°C or 20 ppm/°C and a tolerance of ±0.10% or ±0.20% depending on the resistance value required. The USG1110 series from Caddock uses the Tetrinox® resistance film system and was developed to optimize low temperature coefficient performance and long term stability performance.

  • Ultra-stable precision high voltage axial leaded film through-hole resistors
  • Resistance values available are 100MΩ and 150MΩ
  • TCR of 10 ppm/°C or 20 ppm/°C depending on the resistance value required
  • Tolerance of ±0.1% or ±0.2% depending on the resistance value required
  • Operating temperature -40°C to +85°C
  • Maximum voltage rating 10KV
  • Typical load life stability 0.025% per 1,000 hours
  • Utilising Caddock's Tetrinox® resistance film systems

The low TCR of the Type USG1110 resistors minimizes temperature related drift due to temperature gradients that may exist due to the placement of the resistor components in the high voltage assembly

The below table gives the specifications available for the USG1110 series:

Caddock USG1110 series Specifications

* Please see the datasheet for the specification notes.

£0.00 Ex Tax: £0.00