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HPF250
NON-INDUCTIVE HIGH POWER |
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|
HPF250
NON-INDUCTIVE HIGH POWER |
|
Download PDF File |
|
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
Copyright 1999-2005, RARA Electronics Corporation
