Resistors

Current Sensing & Low Resistance Resistors (129)

Low-ohmic resistors used as the sensing element, where the voltage across a known resistance is the measurement. Four-terminal construction, low temperature coefficient and low thermal EMF keep a milliohm-level reading honest. Specified as shunts in battery and power supply monitoring.

Precision / Ultra-Precision Resistors (126)

Resistors specified by tolerance, temperature coefficient and long-term stability rather than by power rating. Used in instrumentation front ends, references and calibration circuits, where drift over years is the property that decides the design.

Load Banks (89)

Resistive load banks that dissipate a controlled amount of power so a supply or converter can be tested under load. Rated by continuous power, resistance range and cooling method.

Non-Magnetic Resistors (64)

Resistors made without ferromagnetic material, so they neither distort a magnetic field nor move within one. Intended for magnetic resonance imaging, precision instrumentation and any assembly sitting inside a measured field.

Z Foil resistors (56)

Bulk metal foil resistors, holding temperature coefficient, load-life drift and thermal EMF to very low levels, with coefficients down to ±0.2ppm/°C on selected series. Used in metrology, automatic test equipment and space-qualified work.

High-Temperature Resistors (36)

Resistors qualified for high ambient and high surface temperature, in precision and power constructions. Derating curve, terminal material and mounting method carry more weight here than the room-temperature specification.

Power Resistors (33)

Resistors for higher dissipation, in several mounting styles and across a wide resistance span. The thermal path is as much part of the specification as the resistance value, because the rating depends on how the heat leaves the part.

Networks & Voltage Dividers (22)

Resistor networks and voltage dividers where the ratio between elements matters more than the absolute value. Matched and tracking configurations hold that ratio across temperature, for references, instrumentation amplifiers and precision measurement.

High-Voltage Resistors (21)

Resistors rated by voltage as well as by power, for measurement dividers, discharge paths and high-voltage supply control. Creepage, tracking resistance and voltage coefficient are the properties that decide whether the part survives the application.

Standard Resistors (9)

General-purpose resistors in common values, tolerances and packages, for the parts of a design where the resistor is not the critical element.

Thermosensitive Resistors (7)

Resistors whose resistance changes predictably with temperature, used deliberately as a compensating element rather than held stable against it. For temperature measurement, bias compensation and thermal protection in analogue and power circuits.

RARA IRH150

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Option of flying leads (tab terminals are standard)
  • Inductive or non-inductive design
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C
  • Extruded aluminium horizontal housing
  • Short time overload of 10 x power rating is 5 seconds

RARA IRH200

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Option of flying leads (tab terminals are standard)
  • Inductive or non-inductive design
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C
  • Extruded aluminium horizontal housing
  • Short time overload of 10 x power rating is 5 seconds

Caddock TF656 Series

Low TC Ultra-Precision Film Resistors
  • Ultra-precision film through-hole resistor
  • Radial or axial leaded variants available
  • Maximum working voltage of 1.4kV
  • Constructed with Caddock’s Tetrinox® resistance films
  • Long term stability to 0.01% per 1,000 hours
  • Storage temperature range from -55°C up to +105°C

RARA IRH300

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Option of flying leads (tab terminals are standard)
  • Inductive or non-inductive design
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C
  • Extruded aluminium horizontal housing
  • Short time overload of 10 x power rating is 5 seconds

Caddock TG Series

Low TC Precision High Voltage Resistors
  • Precision high voltage axial leaded through-hole resistor
  • Resistance range: 25 kΩ to 1,000 MΩ
  • Temperature coefficient: ±25 ppm/°C from -55°C to +125°C
  • Load life stability: 0.25% per 1,000 hours at +125°C
  • Resistance tolerance options: ±0.1%, ±0.25%, ±0.5%, ±1%
  • Maximum continuous operating voltage up to 30 kV
  • -15 series increases maximum voltage by 60%

RARA IRH400

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Option of flying leads (tab terminals are standard)
  • Inductive or non-inductive design
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C
  • Extruded aluminium horizontal housing
  • Short time overload of 10 x power rating is 5 seconds

RARA IRH500

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Option of flying leads (tab terminals are standard)
  • Inductive or non-inductive design
  • Insulation resistance of 20MΩ minimum
  • Temperature range of -55°C up to +200°C
  • Extruded aluminium horizontal housing
  • Short time overload of 10 x power rating is 5 seconds

RARA IRM600

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 94Ω
  • Power rating of up to 600W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM Series

RARA IRM800

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 112Ω
  • Power rating of up to 800W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM

RARA IRM1000

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 150Ω
  • Power rating of up to 1000W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM

RARA IRM1200

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.1Ω up to 160Ω
  • Power rating of up to 1200W (on a heat sink)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM

RARA IRM1600

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.3Ω up to 88Ω
  • Power rating of up to 570W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM

RARA IRM2000

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.45Ω up to 133Ω
  • Power rating of up to 650W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM

RARA IRM2400

Metal Clad Wire Wound Resistors
  • Metal clad wire wound resistor
  • Resistance options from 0.6Ω up to 144Ω
  • Power rating of up to 720W (free air)
  • Tolerance options between ±1% and ±10.0%
  • TCR of +260 ppm/°C maximum
  • For UL Approval see the ULM

Caddock THV10 Series

Precision High Voltage Divider Networks
  • Precision through-hole high voltage divider network
  • Total resistance of 100MΩ
  • Ratios of 100:1 or 1,000:1
  • Tighter ratio TCR and ratio tolerances than with standard high voltage divider products
  • Utilises Caddock’s Tetrinox® resistance films

Caddock THV15 Series

Precision High Voltage Divider Networks
  • Precision through-hole high voltage divider network
  • Total resistance of 150MΩ
  • Ratios of 100:1 or 1,000:1
  • Tighter ratio TCR and ratio tolerances than with standard high voltage divider products
  • Utilises Caddock’s Tetrinox® resistance films

Custom Component Solutions

Working alongside your design team from the earliest stage, we help you select the right part for the application and, where a standard part will not do, develop customised components with our manufacturing partners such as lead length, termination and package size.

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Resistors

Resistors run across twelve sub-categories: precision and ultra-precision, Z-foil, current sensing and low resistance, high-voltage, high-temperature, high-energy, non-magnetic, power, standard, thermosensitive, networks and voltage dividers, then load banks. Custom values are available on several lines.