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.

Caddock MPM20 Series

Kool-Pak® Power Film Resistors
  • TO-220 Kool-Tab® style power through-hole resistor
  • “Pure Tin free” design for high performance industrial and military applications
  • Metal mounting tab with single screw hole for simplified heat sink mounting
  • Non-inductive design
  • Constructed with Caddock’s Micronox® resistance film technology
  • Maximum voltage rating of 300V
  • Operation up to +175°C case temperature

Caddock MS Series

Precision Power Film Resistors
  • Precision high temperature power axial leaded through-hole resistor
  • Maximum operating voltage up to 6kV
  • Maximum operating temperature up to +275°C
  • Utilises Caddock’s Micronox® resistance film for outstanding stability when exposed to a high ambient temperature, thermal shock and high power densities
  • MS resistors have demonstrated excellent long-term stability of 0.05% per 1,000 hours over extended life
  • Caddock’s non-inductive design available on some models

Caddock MV Series

Low Resistance Power Film Resistors
  • Low resistance high temperature power axial leaded through-hole resistor
  • Maximum operating temperature up to +275°C
  • Utilises Caddock’s Micronox® resistance film
  • Five sizes and power ratings
  • Utilises Caddock’s non-inductive design

Caddock MX500 Series

Precision High Voltage Resistors
  • High ohmic high voltage axial leaded through-hole resistor
  • Maximum operating temperature up to +175°C
  • Utilises Caddock’s Micronox® resistance film
  • Five sizes and voltage ratings from 7.5kV up to 32kV
  • Utilises Caddock’s non-inductive design

Caddock SR10 Series

Precision Current Sense Resistors
  • Low resistance precision current sense through-hole resistor
  • 4-terminal (Kelvin terminals) design
  • Compact footprint
  • Utilises Caddock’s Micronox® resistance film
  • Temperature range up to +150°C
  • Utilises Caddock’s non-inductive design

Caddock SR20 Series

Precision Current Sense Resistors
  • Low resistance precision current sense through-hole resistor
  • 4-terminal (Kelvin terminals) design
  • Compact footprint
  • Utilises Caddock’s Micronox® resistance film
  • Temperature range up to +150°C
  • Utilises Caddock’s non-inductive design

Caddock T1794 Series

Custom Low Ratio TC, Precision SIP Resistor Networks
  • Custom through-hole low TCR precision SIP resistor networks
  • Ratio-of-ratios as required down to as close to 0.025%
  • Unique thin-profile, single-in-line edge-mounted package
  • Utilises Caddock’s Tetrinox® resistance technology

Caddock T912 Series

Precision and Ultra-Precision Networks with Low Ratio TC
  • Through-hole precision resistor network
  • 2 resistor elements, with either a ratio of 10:1, 9:1 or 1:1
  • Utilises Caddock’s Tetrinox® resistance technology
  • Voltage rating of 30VDC or RMS AC applied to R1 or R2
  • Custom options and configurations are available upon request

Caddock T914 Series

Precision and Ultra-Precision Networks with Low Ratio TC
  • Through-hole precision resistor network
  • 4 resistor elements, with a ratio of 1:1
  • Utilises Caddock’s Tetrinox® resistance technology
  • Voltage rating of 30VDC or RMS AC applied to R1, R2, R3 or R4
  • Custom options and configurations are available upon request

Caddock TF020 Series

Low TC Ultra-Precision Film Resistors
  • Ultra-precision film through-hole resistor
  • Radial or axial leaded variants available
  • Maximum working voltage of 300V
  • 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 IRH60

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 5 x power rating is 5 seconds

RARA IRH80

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 TF050 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 IRH100

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 TF626 Series

Low TC Ultra-Precision Film Resistors
  • Ultra-precision film through-hole resistor
  • Radial or axial leaded variants available
  • Maximum working voltage of 300V
  • 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 IRH120

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

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.