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HPF250 NON-INDUCTIVE HIGH POWER
THICK FILM
RESISTORS

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INTRODUCTION
These are 250W, chassis mounted, non-inductive, high power resistors. The small and thin size is ideal for
high density, compact instruments. Theses models exhibit superior vibration characteristics. The thermal
resistance between the element and heat sink is excellent. Superior dielectric strength is achieved by
using a 96% aluminium substrate as an insulator between the element and metal base. Applications include:
snubber and attenuator resistors.

GENERAL SPECIFICATIONS

Model

Wattage Rating
on Heatsink
Resistance
Range [ohms]

Tolerance[%]

HPF250 250W See Note: 1 5 to 1K +-10(K)

Notes:
1/  The base of the resistor should be kept below 100C

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

Temperature Range

-55 to +125C

Insulation Resistance Over 1Gohm Between two  terminals and tab
Dielectric Strength DC5000V   1min
Temp. Coefficient +-250ppm/C
Moisture Resistance +- [2.00%+0.05ohm], 60C, 90 to 95%RH, DC 1W, 1000H.
Vibration +- [0.5%+0.05ohm], JIS-C-5202
Load Life +- [2.00%+0.05ohm], 25C, 90min. ON, 30min. OFF,1000H., rated
Thermal Resistance 0.1C/W, from Resistor Surface to Fin
Mounting Torque 15kgf cm
Max. Applied Voltage 1000V, Voltage is in accordance with E= root(RP)
Temperature Cycle +- [0.5%+0.05ohm], -55C, 30 min., +120C. 30min., 20cycles

 

 

 

 

 

DIMENSIONS


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Tel:82-32-817-4325 Fax:82-32-817-4329

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