Scientific Instrumentation

Services

A wide range of precision and ultra-precision resistors from Alpha Electronics, General Resistance and Susumu, power resistors from Caddock and current sensing resistors and shunts from Isabellenhütte in a variety surface-mount and through-hole packages and virtually any resistance value.

Variety of NTC and PTC thermistors, thermal probes and inrush current limiters from Ametherm.

A range of digital isolators from NVE Corporation, based on their patented spintronic GMR technology.

Caddock HVD Series

Ultra-precision through-hole high voltage divider
6 standard models of the HVD series
Monolithic voltage dividers built with ceramic sandwich construction
Ratios (R_T:R₂) of 100:1 or 1,000:1
Ideal for high performance voltage division applications in medical equipment, laboratory equipment and analytical instruments
Over voltage of 1.5 times rated voltage for 5s

Caddock MG Standard Range

Cylindrical high voltage axial leaded resistor
Maximum operating voltage from 600V up to 30kV *
Resistance values from 200Ω up to 2GΩ *
Tolerances of ±0.1%, ±0.25%, ±0.5% and ±1%
TCR as tight as ±80 ppm/°C from -15°C to +105°C
Maximum power rating from 0.5W up to 15W *
Operating Temperature Range of -55°C to +225°C

_{* Dependant on selected resistor model}

Caddock CC2015FC Series

Current sensing resistor
Resistance range from 0.02Ω to 10Ω
Tolerance from ±1.0% to ±5.0%
TCR of -20 to +80, 0 to +200 or +300 ppm/°C
Power rating of 1W at 70°C
Temperature range from -55°C to +150°C

Caddock MG -15 Range

Cylindrical high voltage axial leaded resistor
Maximum operating voltage from 960V up to 48kV *
Resistance values from 6.5MΩ up to 2GΩ *
Tolerances of ±1% and ±5%
TCR as tight as ±80 ppm/°C from -15°C to +105°C
Maximum power rating from 0.5W up to 15W *
Operating Temperature Range of -55°C to +225°C

_{* Dependant on selected resistor model}

Caddock MG Extended Range

Cylindrical high voltage axial leaded resistor
Maximum operating voltage from 2kV up to 30kV *
Resistance values from 600Ω up to 10GΩ *
Tolerances of ±1% and ±5%
TCR as tight as ±80 ppm/°C from +25°C to +105°C
Operating Temperature Range of -55°C to +225°C
Maximum power rating from 1.5W up to 15W *

_{* Dependant on selected resistor model}

Caddock TF020 Series

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

Caddock TF050 Series

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

Caddock TF626 Series

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

Caddock TF656 Series

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

Caddock TG Series

Precision high voltage axial leaded through-hole resistor
Maximum operating voltage from 4kV up to 30kV (standard series)
Utilises Caddock’s Tetrinox® resistance film to achieve the unique combination of low TCR and high stability performance
Load life stability of 0.25% per 1,000 hours at +125°C
-15 series increases the maximum voltage ratings by 60% (48kV for the TG1015 model)
Maximum continuous operating temperature of +225°C

Caddock USF240 Series

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 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 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 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 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 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