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 TK733 Series

Precision Low TC, Radial-Lead Film Resistors
  • Precision radial leaded film through-hole resistor
  • Caddock’s non-inductive performance
  • Maximum working voltage of 300V
  • Compact rectangular package with standard lead spacing
  • Constructed with Caddock’s Tetrinox® resistance films
  • Long-term absolute stability typically better than ±0.05% per 2,000 hours
  • Temperature range from -40°C up to +150°C

Caddock USF240 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistors
  • Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
  • Maximum working voltage of 300V
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in standard resistance values most commonly used in precision analog design
  • Zero nominal TCR
  • Temperature range from -40°C up to +85°C

Caddock USF270 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistors
  • Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
  • Maximum working voltage of 1.4kV
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in standard resistance values most commonly used in precision analog design
  • Zero nominal TCR
  • Temperature range from -40°C up to +85°C

Caddock USF271 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistors
  • Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
  • Maximum working voltage of 2.5kV
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in standard resistance values most commonly used in precision analog design
  • Zero nominal TCR
  • Temperature range from -40°C up to +85°C

Caddock USF340 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistors
  • Maximum working voltage of 300V
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in standard resistance values most commonly used in precision analog design
  • Zero nominal TCR
  • Temperature range from -40°C up to +85°C

Caddock USF370 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistors
  • Maximum working voltage of 1.4kV
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in standard resistance values most commonly used in precision analog design
  • Zero nominal TCR
  • Temperature range from -40°C up to +85°C

Caddock USF371 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistors
  • Maximum working voltage of 2.5kV
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in standard resistance values most commonly used in precision analog design
  • Zero nominal TCR
  • Temperature range from -40°C up to +85°C

Caddock USFS Series

Ultra-Stable Low TC Ultra-Precision Film Resistors
  • Ultra-stable radial leaded film through-hole resistor sets
  • Sets are available with either 3 or 5 selected USF300 series resistors (model dependent)
  • Voltage coefficient as low as 0.005 ppm/V per resistor set (model dependent)
  • Ceramic package provides cool operation
  • Utilising Caddock’s proprietary resistance film systems
  • Available in 30MΩ, 50MΩ and 100MΩ sets
  • Multiple USFS selected resistor sets can be used in series to achieve higher total resistances and higher voltage ratings

Caddock USG1105 Series

Ultra-Stable Low TC Precision High Voltage Resistors
  • Ultra-stable precision high voltage axial leaded film through-hole resistors
  • Typical load life stability 0.025% per 1,000 hours
  • Temperature range -40°C to +85°C
  • Utilising Caddock’s Tetrinox® resistance film systems
  • Custom low TC HV strings are available: 50KV, 100KV, etc.

Caddock USG1110 Series

Ultra-Stable Low TC Precision High Voltage Resistors
  • Ultra-stable precision high voltage axial leaded film through-hole resistors
  • Typical load life stability 0.025% per 1,000 hours
  • Temperature range -40°C to +85°C
  • Utilising Caddock’s Tetrinox® resistance film systems
  • Custom low TC HV strings are available: 50KV, 100KV, etc.

Caddock USG1115 Series

Ultra-Stable Low TC Precision High Voltage Resistors
  • Ultra-stable precision high voltage axial leaded film through-hole resistors
  • Typical load life stability 0.025% per 1,000 hours
  • Temperature range -40°C to +85°C
  • Utilising Caddock’s Tetrinox® resistance film systems
  • Custom low TC HV strings are available: 50KV, 100KV, etc.

RARA ULH60

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
  • UL approved
  • Extruded aluminium horizontal housing
  • Short time overload of 5 x power rating is 5 seconds

RARA ULH80

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
  • UL approved
  • Extruded aluminium horizontal housing
  • Short time overload of 10 x power rating is 5 seconds

Caddock USGS Series

Ultra-Stable Low TC Precision High Voltage Resistors
  • Ultra-stable axial leaded film through-hole resistor sets
  • Sets are available with either 3 or 5 selected USG1110 series resistors (model dependent)
  • Voltage coefficient as low as 0.02 ppm/V per resistor set (model dependent)
  • Utilising Caddock’s Tetrinox® resistance film systems
  • Available in 300MΩ and 500MΩ sets
  • Multiple USGS selected resistor sets can be used in series to achieve higher total resistances and higher voltage ratings

RARA ULH100

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
  • UL approved
  • Short time overload of 10 x power rating is 5 seconds

Caddock USVD Series

Ultra-Precision Voltage Divider Networks
  • Ultra-precision through-hole high voltage divider
  • 12 standard models of the USVD series
  • Formed by bonding together two selected USF ultra-precision resistors
  • Ratios (RT:R2) of 100:1 or 1,000:1
  • Over voltage of 1.5 times rated voltage for 5s

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.