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Scientific Instrumentation

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.

Scientific Instrumentation

2N6550

InterFET 2N6550 N-Channel JFET with N0450L Geometry. Typical leakage of -6pA and a low input capacitance of 35pF (max). All of this in a TO-46 package.

2N6550

Ametherm ACC-001

Precision interchangeable NTC thermistor
Brown coloured small bead design
Resistance of 2.252kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACC-001

Ametherm ACC-002

Precision interchangeable NTC thermistor
Red coloured small bead design
Resistance of 3kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACC-002

Ametherm ACC-003

Precision interchangeable NTC thermistor
Orange coloured small bead design
Resistance of 5kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACC-003

Ametherm ACC-004

Precision interchangeable NTC thermistor
Yellow coloured small bead design
Resistance of 10kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Yellow colour code
Temperature range from -40°C to +150°C

Ametherm ACC-004

Ametherm ACW-005

Precision interchangeable NTC thermistor
Green colour small bead design
Resistance of 30kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACW-005

Ametherm ACW-006

Precision interchangeable NTC thermistor
Blue coloured small bead design
Resistance of 50kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACW-006

Ametherm ACW-007

Precision interchangeable NTC thermistor
Violet coloured small bead design
Resistance of 100kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACW-007

Caddock 1776 Series

Precision voltage dividers
Resistance ranges from 900Ω to 10MΩ
Absolute Tolerance of +0 -0.5%, ±0.1% or ±0.25%
VCR from ±0.02 ppm/V to ±0.5 ppm/V
Voltage rating of 750V up to 1.2kV
Temperature range 1 from -40°C to +85°C Temperature range 2 from 0°C to +70°C

Caddock 1776 Series

Caddock 1787 Series

Current sensing resistor network
Resistance ranges from 0.9Ω to 1kΩ
Absolute Tolerance of ±0.05%, ±0.1% or ±0.25%
TCR from ±50 ppm/°C to ±100 ppm/°C
Power rating of 1W depending on the model
Temperature range from -55°C to +85°C

Caddock 1787 Series

Caddock 1789 Series

Precision resistor network
Resistance range from 0.5Ω to 10kΩ
Tolerance of ±0.05% to ±1.0%
TCR of ±50, ±80 or ±100 ppm/°C
Power rating of 100mW up to 2W per resistor
Temperature range from 0°C to +70°C

Caddock 1789 Series

Caddock CC1512FC Series

Current sense resistor
Resistance range from 0.01Ω to 10Ω
Tolerance from ±1.0% to ±5.0%
TCR of -20 to +80, 0 to +200 or +300 ppm/°C
Power rating of 0.75W at 70°C
Temperature range from -55°C to +150°C

Caddock CC1512FC Series

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 CC2015FC Series

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 HVD Series

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 Series-1

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 MG Series-1

2N6550

N-Channel JFET

InterFET 2N6550 N-Channel JFET with N0450L Geometry. Typical leakage of -6pA and a low input capacitance of 35pF (max). All of this in a TO-46 package.

Ametherm ACC-001

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Brown coloured small bead design
Resistance of 2.252kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACC-002

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Red coloured small bead design
Resistance of 3kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACC-003

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Orange coloured small bead design
Resistance of 5kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACC-004

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Yellow coloured small bead design
Resistance of 10kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Yellow colour code
Temperature range from -40°C to +150°C

Ametherm ACW-005

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Green colour small bead design
Resistance of 30kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACW-006

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Blue coloured small bead design
Resistance of 50kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Ametherm ACW-007

ACCU-CURVE™ NTC Thermistors

Precision interchangeable NTC thermistor
Violet coloured small bead design
Resistance of 100kΩ (at 25°C)
Tolerance of ±0.2°C
Maximum power rating of 250mW
Temperature range from -40°C to +150°C

Caddock 1776 Series

Precision Decade Resistor Voltage Dividers

Precision voltage dividers
Resistance ranges from 900Ω to 10MΩ
Absolute Tolerance of +0 -0.5%, ±0.1% or ±0.25%
VCR from ±0.02 ppm/V to ±0.5 ppm/V
Voltage rating of 750V up to 1.2kV
Temperature range 1 from -40°C to +85°C Temperature range 2 from 0°C to +70°C

Caddock 1787 Series

Current Sense Resistor Networks

Current sensing resistor network
Resistance ranges from 0.9Ω to 1kΩ
Absolute Tolerance of ±0.05%, ±0.1% or ±0.25%
TCR from ±50 ppm/°C to ±100 ppm/°C
Power rating of 1W depending on the model
Temperature range from -55°C to +85°C

Caddock 1789 Series

Custom Low Resistance Value, Precision SIP Resistor Networks

Precision resistor network
Resistance range from 0.5Ω to 10kΩ
Tolerance of ±0.05% to ±1.0%
TCR of ±50, ±80 or ±100 ppm/°C
Power rating of 100mW up to 2W per resistor
Temperature range from 0°C to +70°C

Caddock CC1512FC Series

Low Resistance Precision Chip Resistors

Current sense resistor
Resistance range from 0.01Ω to 10Ω
Tolerance from ±1.0% to ±5.0%
TCR of -20 to +80, 0 to +200 or +300 ppm/°C
Power rating of 0.75W at 70°C
Temperature range from -55°C to +150°C

Caddock CC2015FC Series

Low Resistance Precision Chip Resistors

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 HVD Series

Ultra-Precision Voltage Divider Networks

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 -15 Range

Precision High Voltage Resistors

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

Precision High Voltage Resistors

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}

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