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A-H FOUR TERMINAL
PRECISION
RESISTORS

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A-H resistors are constructed with four terminal, isolated voltage and current connections (i.e. Kelvin Connection)
making them suitable for very precise current measurements, current limitations and current regulation in power
units, current sources and electronic loads.  Other applications include:  Current measurements in pulse width
modulated(PWM) control circuits as in servo and stepper motors and solenoid driver circuits.

GENERAL SPECIFICATIONS

Model

Resistance

Load Capacity

TCR [ppm/C]
(R>20mohms)

Tolerance

A-H

(1, 2, 5, 22, 50, 100,
200, 500)mohms

(1, 2, 5, 10, 20,100)
ohms

10W
(with heatsink)

<+-10ppm/K
(20C t0 60C)

0.1(B)
0.5(D)
1(F)

 

 

 

CHARACTERISTICS                                                  Values in [ ] mean change in ohmic value after test

Operating Temp. Range -55C to 125C
Dielectric Withstanding Voltage 500VAC
Load Capacity 10W with heatsink
Thermal Resistance to Aluminum Base Plate Rth < 3C/W
Thermal Resistance to Ambient Temperature 15C/W
Inductance (R=10mohms) <10nH
Stability at 125C Foil Temperature Deviation <0.1% after 2000 hours

 

 

 


DIMENSIONS

DERATING

ORDERING PROCEDURE EXAMPLE

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