PR250 Series

THICK FILM POWER RESISTORS PR250

Features pdf-icon_web

Very good ratio Power / Volume
Easy mounting and wiring with significant cost advantages.
Non inductive performance for high frequency applications.
One models for power applications up to 500W.
Suited to ULV94-V0 application

Electrical Specifications

– Power rating

250W (heatsink at 100°C)

– Resistance range

From 1R0 to 1MOhm, E12 series

– Tolerance

Standard 10%, up to 1% on request

– Temperature coefficient:

±100 ppm/°C

– Max Work. Voltage:

5000 Vac

– Work Temp. Range

From -55°C to +155°C

-Dielectric Strength

7000 Vac (12000 Vac x PR250T)

– Insulation resistance

> 105 MOhm a 500V

– Creep distance

42 mm (65 mm x PR250T)

– Air gap distance

16 mm (29mm x PR250T)

– Partial discharge

< 10 pC @ 5000 Vac

– Self inductance

80 nH

– Parallel capacitance

40 pF

-Capacitance to heatsink

< 120 pF

– Overload

4 Pn x 10 s

– Thermal resistance:

0.15 °C/W

– Heatsink flatness

0.05 mm Max

– Heatsink surface finishe

6.3μm Max

– Thermal grease

Required

– Max torque for contacts

2 Nm (static)

– Max torque for mounting

2 Nm (static)

– Weight:

100 g (130 gx PR250T)

– Options

– For values R039 <R< 1R0 is available Metal Foil type PR250M
– Cable terminals PR250C / PR250TC