Here at Rhopoint Components we can offer a range of through hole (THT) and surface-mount (SMD) resistor networks and voltage dividers by industry leading manufacturers Alpha Electronics, Caddock, Ohmcraft and Susumu. With flexible circuit design options, range of tolerances and ratings, we can help find the right resistor network for your project. Our range includes high voltage dividers and high precision, current sensing, high and low ohmic resistor networks, including fully customisable solutions.

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

The MU ultra-precision resistor 1-2-3 network series from Alpha Electronics offers a 3 terminal, 2 element resistor network in a small surface-mount package. Each resistive element can range from 10Ω up to 20kΩ all with tight tolerances down to +0.02% absolute and +0.01% matching (1kΩ to 20kΩ). By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce this resistor network series with low temperature coefficients (both absolute and tracking) as well as excellent long-term stability. The Alpha MU series J-lead terminals provide flexibility once the parts are soldered to the board compared to standard fixed surface-mount resistors.

2 element resistor network

Each resistor element is available in any resistance between 10Ω and 20kΩ

Surface-mount moulded package with J-lead terminations

Tight absolute tolerance of ±0.02% for resistances between 1kΩ and 20kΩ with an even tighter matching tolerance of ±0.01% over the same resistance range available

Tight absolute TCR of ±5 ppm/°C (from -55°C up to +125°C, between 100Ω and 20kΩ)

Tight tracking TCR available of between ±1 ppm/°C and ±5 ppm/°C depending on resistance ratio between the two elements

Power rating of 0.05W per resistor element (at +125°C)

Maximum rated operating temperature +125°C

Working temperature from -65°C up to +150°C

The MU surface-mount, ultra-precision resistor 1-2-3 network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

Alpha's MU resistor network series are ideal for use in input and feedback resistors for amplifiers due to both the input and feedback resistors being incorporated into the same package, therefore amplification is not affected by temperature change.

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

* Symbols parenthesized are for part number composition ** Please contact us for resistance availability

The SC case-encapsulated precision resistor network series from Alpha Electronics is fully customisable and offers excellent performance in TCR tracking, resistance ratio matching and stability thanks to Alpha's Bulk Metal® foil resistor technology. The SC ultra-precision resistor network series can offer up to a maximum of 10 resistive elements. Each resistive element can range from 30Ω up to 120kΩ all with tight tolerances, both absolute and matching, down to +0.01% (the maximum total resistance for the network is 1,200kΩ).

Fully customisable resistor network with up to 10 resistor elements and 5 different standard circuit layouts to choose from

Each resistor element is available in any resistance between 30Ω and 120kΩ

Maximum resistance value for complete resistor network of 1,200kΩ

Through-hole case-encapsulated package

Tight absolute and matching tolerances as low as ±0.01% available

Tight absolute TCR of ±5 ppm/°C (from -25°C up to +125°C)

Tight tracking TCR available of between ±1 ppm/°C and ±3 ppm/°C depending on resistance ratio (Rmax. / Rmin.)

Power rating of 1.5W for the complete resistor package (at +70°C)

Maximum rated operating temperature +70°C

Working temperature from -55°C up to +155°C

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

These resistors are fully customisable including the circuit layout. There are 5 standard circuit types available to choose from:

Circuit layout A - resistor array

Circuit layout B - independent resistors in the same package

Circuit layout C - divider network

Circuit layout E - circuit layout A split into 2 i.e. 2 separate resistor arrays

Circuit layout F - circuit layout C split into 2 i.e. 2 separate divider networks

For full details, please see the ultra-precision resistor networks supporting document under the technical library tab.

Pin pitch for the Alpha SC series will be in multiples of 2.54mm.

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

* TCR tracking is dependent on resistance ratio, please see Table 1 ** Symbols parenthesized are for part number composition

The SE conformally coated precision resistor network series from Alpha Electronics is fully customisable and offers excellent performance in TCR tracking, resistance ratio matching and stability thanks to Alpha's Bulk Metal® foil resistor technology. The SE precision resistor network series can offer up to a maximum of 5 resistive elements. Each resistive element can range from 30Ω up to 120kΩ all with tight tolerances down to +0.05% absolute and +0.01% matching (the maximum total resistance for the network is 600kΩ).

Fully customisable resistor network with up to 5 resistor elements and 4 different standard circuit layouts to choose from

Each resistor element is available in any resistance between 30Ω and 120kΩ

Maximum resistance value for complete resistor network of 600kΩ

Through-hole conformally coated package

Tight absolute tolerance of ±0.05% with an even tighter matching tolerance of ±0.01% available

Tight absolute TCR of ±5 ppm/°C (from -25°C up to +125°C)

Tight tracking TCR available of between ±1 ppm/°C and ±3 ppm/°C depending on resistance ratio (Rmax. / Rmin.)

Power rating of 1W for the complete resistor package (at +70°C)

Maximum rated operating temperature +70°C

Working temperature from -25°C up to +125°C

The SE conformally coated, through-hole, precision resistor network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

These resistors are fully customisable including the circuit layout. There are 4 standard circuit types available to choose from:

Circuit layout A - resistor array

Circuit layout B - independent resistors in the same package

Circuit layout C - divider network

Circuit layout F - circuit layout C split into 2 i.e. 2 separate divider networks

For full details, please see the ultra-precision resistor networks supporting document under the technical library tab.

Pin pitch for the Alpha SE series will be in multiples of 2.54mm.

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

* TCR tracking is dependent on resistance ratio, please see Table 1 ** Symbols parenthesized are for part number composition

The SF conformally coated precision resistor network series from Alpha Electronics is fully customisable and offers excellent performance in TCR tracking, resistance ratio matching and stability thanks to Alpha's Bulk Metal® foil resistor technology. The SF precision resistor network series offers 2 resistive elements. Each resistive element can range from 30Ω up to 120kΩ all with tight tolerances down to +0.05% absolute and +0.01% matching (the maximum total resistance for the network is 240kΩ).

Fully customisable resistor network with 2 resistor elements and 2 different standard circuit layouts to choose from

Each resistor element is available in any resistance between 30Ω and 120kΩ

Maximum resistance value for complete resistor network of 240kΩ

Through-hole conformally coated package

Tight absolute tolerance of ±0.05% with an even tighter matching tolerance of ±0.01% available

Tight absolute TCR of ±5 ppm/°C (from -25°C up to +125°C)

Tight tracking TCR available of between ±1 ppm/°C and ±3 ppm/°C depending on resistance ratio (Rmax. / Rmin.)

Power rating of 0.5W for the complete resistor package (at +70°C)

Maximum rated operating temperature +70°C

Working temperature from -25°C up to +125°C

The SF conformally coated, through-hole, precision resistor network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

These resistors are fully customisable including the circuit layout. There are 2 standard circuit types available to choose from:

Circuit layout B - independent resistors in the same package

Circuit layout C - divider network

For full details, please see the ultra-precision resistor networks supporting document under the technical library tab.

Pin pitch for the Alpha SF series will be in multiples of 2.54mm.

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

* TCR tracking is dependent on resistance ratio, please see Table 1 ** Symbols parenthesized are for part number composition

The SLD conformally coated ultra-precision resistor 1-2-3 network series from Alpha Electronics offers a 3 terminal, 2 element resistor network in a small through-hole package. Each resistive element can range from 50Ω up to 30kΩ all with tight tolerances down to +0.05% absolute and +0.02% matching (100Ω to 30kΩ). By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce this resistor network series with low temperature coefficients (both absolute and tracking) as well as excellent long-term stability. The Alpha SLD series offers three pins with a standard pin pitch of 2.54 ±0.25mm.

2 element resistor network

Each resistor element is available in any resistance between 50Ω and 30kΩ

Through-hole conformally coated 3 pin package

Tight absolute tolerance of ±0.05% for resistances between 100Ω and 30kΩ with an even tighter matching tolerance of ±0.02% over the same resistance range available

Tight absolute TCR of ±2.5 ppm/°C (from -25°C up to +125°C)

Tight tracking TCR available of between ±0.5 ppm/°C and ±3 ppm/°C depending on resistance ratio between the two elements

Power rating of 0.25W per resistor package (at +70°C)

Maximum rated operating temperature +70°C

Working temperature from -25°C up to +125°C

The SLD through-hole, ultra-precision resistor 1-2-3 network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

Alpha's SLD resistor network series are ideal for use in input and feedback resistors for amplifiers due to both the input and feedback resistors being incorporated into the same package, therefore amplification is not affected by temperature change.

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

* Symbols parenthesized are for part number composition ** Please contact us for resistance availability TCR is from -25°C to +125°C for SLD Type

The SM transfer moulded ultra-precision resistor 1-2-3 network series from Alpha Electronics offers a 3 terminal, 2 element resistor network in a small through-hole package. Each resistive element can range from 10Ω up to 30kΩ all with tight tolerances down to +0.02% absolute and +0.01% matching (50Ω to 30kΩ). By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce this resistor network series with low temperature coefficients (both absolute and tracking) as well as excellent long-term stability. The Alpha SM series offers three pins with a standard pin pitch of 2.54 ±0.25mm.

2 element resistor network

Each resistor element is available in any resistance between 50Ω and 30kΩ

Through-hole conformally coated 3 pin package

Tight absolute tolerance of ±0.02% for resistances between 100Ω and 30kΩ with an even tighter matching tolerance of ±0.01% over the same resistance range available

Tight absolute TCR of ±2.5 ppm/°C (from -55°C up to +125°C)

Tight tracking TCR available of between ±0.5 ppm/°C and ±3 ppm/°C depending on resistance ratio between the two elements

Power rating of 0.3W per resistor package (at +125°C)

Maximum rated operating temperature +125°C

Working temperature from -65°C up to +150°C

The SM through-hole, ultra-precision resistor 1-2-3 network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

Alpha's SM resistor network series are ideal for use in input and feedback resistors for amplifiers due to both the input and feedback resistors being incorporated into the same package, therefore amplification is not affected by temperature change.

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

* Symbols parenthesized are for part number composition ** Please contact us for resistance availability TCR is from -25°C to +125°C for SLD Type

The SS conformally coated precision resistor network series from Alpha Electronics is fully customisable and offers excellent performance in TCR tracking, resistance ratio matching and stability thanks to Alpha's Bulk Metal® foil resistor technology. The SS precision resistor network series can offer up to a maximum of 5 resistive elements. Each resistive element can range from 30Ω up to 20kΩ all with tight tolerances down to +0.05% absolute and +0.01% matching (the maximum total resistance for the network is 100kΩ).

Fully customisable resistor network with up to 5 resistor elements and 5 different standard circuit layouts to choose from

Each resistor element is available in any resistance between 30Ω and 20kΩ

Maximum resistance value for complete resistor network of 100kΩ

Through-hole conformally coated package

Tight absolute tolerance of ±0.05% with an even tighter matching tolerance of ±0.01% available

Tight absolute TCR of ±5 ppm/°C (from -25°C up to +125°C)

Tight tracking TCR available of between ±1 ppm/°C and ±3 ppm/°C depending on resistance ratio (Rmax. / Rmin.)

Power rating of 1W for the complete resistor package (at +70°C)

Maximum rated operating temperature +70°C

Working temperature from -25°C up to +125°C

The SS conformally coated, through-hole, precision resistor network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

These resistors are fully customisable including the circuit layout. There are 5 standard circuit types available to choose from:

Circuit layout A - resistor array

Circuit layout B - independent resistors in the same package

Circuit layout C - divider network

Circuit layout E - circuit layout A split into 2 i.e. 2 separate resistor arrays

Circuit layout F - circuit layout C split into 2 i.e. 2 separate divider networks

For full details, please see the ultra-precision resistor networks supporting document under the technical library tab.

Pin pitch for the Alpha SS series will be in multiples of 2.54mm.

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

* TCR tracking is dependent on resistance ratio, please see Table 1 ** Symbols parenthesized are for part number composition

The 1776 precision decade resistor voltage dividers from Caddock offer between 3, 4 and 5 resistors in a single through-hole package, with ratios ranging from 10:1 up to 10,000:1. Caddock offer 39 standard models of the 1776 series including the new smaller and lower cost options. They can offer voltage ratings of up to 1.2kV continuous with an over-voltage up to 2kV. The exceptional performance of this extensive family of Caddock 1776 precision decade resistor voltage dividers has been achieved through the special combination of advantages provided by Caddock's Tetrinox® resistance films.

Precision through-hole decade resistor voltage dividers

39 standard models of the 1776 series

3, 4 and 5 decade voltage dividers with ratios from 10:1 to 10,000:1

Smaller models requiring less board space

Voltage rating from 750V up to 1.2kV (DC or RMS AC voltage applied to R_{1} in series with any combination of R_{2}, R_{3}, R_{4} and R_{5})

Over-voltage of up to 2kV or 1.67 times rated DC voltage (V_{DC} or peak V_{AC} applied to R_{1} in series with any combination of R_{2}, R_{3}, R_{4} and R_{5} for 10s)

Many combinations of Ratio and Absolute Tolerance as well as Ratio and Absolute TCR

Exceptional performance achieved through the special combination of advantages provided by Caddock's Tetrinox® resistance films

Designed for digital multimeters and range switching equipment, the Caddock 1776 precision resistor networks deliver higher performance than selected discrete resistor sets and thin-film networks.

The 1776 series is supplied in various sizes with different pin layouts depending on the resistance ratio and resistance values of the divider network.

The 1787 current sense resistor network series from Caddock offers 3 or 4 resistance values in a single through-hole package, ranging from R_{A} = 99.9Ω, R_{B} = 9.9Ω and R_{C} = 0.9Ω up to R_{A} = 1kΩ, R_{B} = 100Ω, R_{C} = 10Ω and R_{D} = 1Ω. Caddock offer 12 standard models of the 1787 series with 5 network arrangements, providing the specific accuracy and resistance values required for a wide range of current measuring instruments and circuits. They can offer maximum power ratings of up to 0.75W or 1W depending on the model.

Through-hole current sensing resistor network

12 standard models in 5 network arrangements

3 or 4 resistor elements in a thin-profile single package

Resistance range from R_{A} = 99.9Ω, R_{B} = 9.9Ω and R_{C} = 0.9Ω up to R_{A} = 1kΩ, R_{B} = 100Ω, R_{C} = 10Ω and R_{D} = 1Ω

The monolithic construction and standardised lead spacing simplify installation

Caddock's Micronox® resistance films provide exceptional stability for improved long-term measurement accuracy

Storage temperature between -55°C and +85°C

The Caddock 1787 current sense through-hole resistor networks utilise Caddock's Micronox® resistance films and advanced high through-put laser manufacturing capabilities to achieve many vital advantages in precision current measurement circuits, including laboratory and bench-type digital instrumentation.

The thin-profile single package configuration replaces as many as four discrete current sense resistors.

The 1787 series is supplied in various sizes with different pin layouts depending on the resistance values and electrical specifications of the current sense network.

The 1789 custom low resistance value precision SIP resistor networks from Caddock offer resistance values as low as 0.5Ω up to 10kΩ. The design flexibility achieved by Caddock's advanced resistance film technologies is extended to low resistance values in precision resistor networks through the application of Caddock's Micronox® resistance films. By applying this technology to the low-profile, single-in-line package configuration, the Caddock 1789 custom low resistance value precision SIP resistor networks are available with a combination of features.

Resistance values from 0.5Ω to 10,000Ω

Absolute tolerance from as low as ±0.05% up to ±1.0%

Ratio tolerance from as low as ±0.05% up to ±1.0%

Absolute TCR from as low as ±50 ppm/°C up to ±100 ppm/°C (between 0°C and +70°C)

Ratio TCR from as low as ±15 ppm/°C up to ±80 ppm/°C (between 0°C and +70°C)

Power rating of between 0.1W and 2W per resistor

Where high accuracy and low resistance values must be combined, as in high accuracy current measurement circuitry, Kelvin terminations can be provided for low resistance values to minimize lead resistance errors.

The optimum design of Caddock 1789 custom low resistance value precision SIP resistor networks is best achieved when the performance of Micronox® resistance film technologies is blended with particular circuit specifications and the unique thin-profile, single-in-line package design to arrive at the final network package size, pin spacing, and pin style.

Applications for the 1789 series include:

Current summing networks

Precision termination networks

Precision current sense resistor networks

Impedance matching networks

For a custom 1789 resistor network, please contact us with any requirements and our technical team will assist you.

The HVD ultra-precision high voltage divider series from Caddock offers ultra-precision performance in the range of 1.5kVDC to 5kVDC, with a ratio tolerance of ±0.05% and ratio TCR of ±5 ppm/°C. The HVD series offers R_{T} values of between 10MΩ and 50MΩ as well as ratios (R_{T}:R_{2}) of 100:1 and 1,000:1. They are monolithic voltage dividers built with ceramic sandwich construction.

Through-hole ultra-precision voltage divider

6 standard models of the HVD series

Ratios (R_{T}:R_{2}) of 100:1 and 1000:1

Total resistance values (R_{1}+R_{2}) from 10MΩ to 50MΩ

Monolithic voltage dividers built with ceramic sandwich construction

Continuous operating voltage from 1.5kVDC up to 5kVDC

Over-voltage of 1.5 times rated voltage for 5s

Absolute tolerance of ±0.1% with ratio tolerance (RT:R2) of ±0.05%

Absolute TCR of ±30 ppm/°C with ratio TCR (RT:R2) of ±5 ppm/°C

Operating temperature range from -40°C up to +85°C

These Caddock HVD dividers are ideal for high performance voltage division applications in medical equipment, laboratory equipment, analytical instruments.

Customisations are available upon request for high quantity applications (greater than 1000 per year). Customisations include custom voltage division ratios and ratio specifications that optimise the performance and cost for your application.

The below table gives the available specifications and parts available for the complete HVD series:

The LC2000 transient tolerant precision resistor network series from Caddock is available with standard and custom resistor pairs, all with precision ratio tolerance options of ±0.25%, ±0.5% and ±1.0%.

Telephone line interface resistors for telephone line card applications

Lightning transient handling while maintaining precision ratio tolerance

Quick fail-safe performance when exposed to cold start voltages of 120VAC, 240VAC, or 600VRMS AC. Protecting telephone system wiring from damage or ignition.

Available with optional spring thermal cutoff protection, mounted on the resistor network substrate. When excessive low voltage power cross causes excessive heating in the resistor network, the spring thermal cutoff opens the circuit and protects the circuit board from heat damage or ignition.

Available with optional thermistor temperature sensing element for controlling a relay circuit which disconnects the excessive low voltage overload, protecting the circuit board from heat damage.

Standard resistance pairs available 24Ω, 30Ω, 40Ω, 50Ω, 100Ω, and 200Ω (Custom values also available upon request)

Precision ratio tolerance of ±0.25%, ±0.5%, or ±1.0%

Operating temperature range from -40°C up to +85°C

Product drawings for the product which meets the needs of your application are available upon request. Each product drawing describes how each network is designed to meet the applicable requirements of GR-1089-CORE and ITU-T K.20.

Custom precision resistor network configurations that can best meet your needs are available upon request. Please contact us with your requirements.

The T1794 series from Caddock are custom low temperature coefficient precision SIP resistor networks, with a resistance range from 500Ω to 50MΩ. These resistors have an absolute tolerance range of between ±0.025% and ±1.0% and a ratio tolerance of between ±0.01% and ±1.0%. The absolute TCR (from -40°C to +85°C) values are: ±15 ppm/°C, ±25 ppm/°C, ±50 ppm/°C and the ratio TCR (from -40°C to +85°C) values are: ±10 ppm/°C, ±25 ppm/°C and ±50 ppm/°C. The Caddock T1794 series unique thin-profile, single-in-line edgemount package design allows the wide range of flexibility necessary to blend the performance of Tetrinox® resistance technology with particular circuit specifications to arrive at the final network package size, pin spacing and pin style.

The T912 series from Caddock are resistor pairs and quads with ratio characteristics for precision analog circuits, with a resistance range from 1kΩ to 1MΩ. These resistors have an absolute tolerance of ±0.1% and a ratio tolerance from ±0.01% to ±0.1%. The absolute TCR (from -40°C to +85°C) values are: ±15 ppm/°C, ±25 ppm/°C, ±50 ppm/°C, and the ratio TCR (from -40°C to +85°C) values are: ±10 ppm/°C, ±25 ppm/°C and ±50 ppm/°C. The Caddock T912 series are constructed using the Tetrinox® resistance technology, in addition to the 14 standard equal value models of the Type T912 and T914, they can also be ordered with resistance ratios of 10:1, 9:1 or 1:1.

Custom through-hole precision resistor networks

2 resistor elements, with either a ratio of 10:1, 9:1 or 1:1

Resistance values available between 1kΩ and 1MΩ

Absolute TCR (from -40°C to +85°C): ±25 ppm/°C

Ratio TCR (from -40°C to +85°C): ±2 ppm/°C, ±5 ppm/°C and ±10 ppm/°C

Absolute tolerance of: ±0.1%

Ratio tolerance of: ±0.01% to ±0.1%

Voltage rating of 30V DC or RMS AC applied to R_{1} or R_{2}

Custom options and configurations are available upon request

The T914 series from Caddock are resistor quads with ratio characteristics for precision analog circuits, with a resistance range from 1kΩ to 1MΩ. These resistors have an absolute tolerance of ±0.1% and a ratio tolerance from ±0.01% to ±0.1%. The absolute TCR (from -40°C to +85°C) values are: ±15 ppm/°C, ±25 ppm/°C, ±50 ppm/°C, and the ratio TCR (from -40°C to +85°C) values are: ±10 ppm/°C, ±25 ppm/°C and ±50 ppm/°C. The Caddock T914 series are constructed using the Tetrinox® resistance technology, in addition to the 14 standard equal values for the 2 resistor elements with a ratio of 1:1

Custom through-hole precision resistor networks

4 resistor elements, with a ratio of 1:1

Resistance values available between 1kΩ and 1MΩ

Absolute TCR (from -40°C to +85°C): ±25 ppm/°C

Ratio TCR (from -40°C to +85°C): ±2 ppm/°C, ±5 ppm/°C and ±10 ppm/°C

Absolute tolerance of: ±0.1%

Ratio tolerance of: ±0.01% to ±0.1%

Voltage rating of 30V DC or RMS AC applied to R_{1}, R_{2}, R_{3} or R_{4}

Custom options and configurations are available upon request