Document Number: 28729

For technical questions contact: ff3dresistors@vishay.com

www.vishay.com

Revision: 24-Feb-04

1

PR01/02/03

Vishay BCcomponents

Power Metal Film Resistors

FEATURES

• High power in small packages

• Different lead materials for different applications

• Defined interruption behaviour.

APPLICATIONS

• All general purpose power applications

A homogeneous film of metal alloy is deposited on a high

grade ceramic body. After a helical groove has been cut in

the resistive layer, tinned connecting wires of electrolytic

copper or copper-clad iron are welded to the end-caps. The

resistors are coated with a red, nonflammable lacquer which

provides electrical, mechanical and climatic protection. This

coating

is

not

resistant

to

aggressive

fluxes.

The

encapsulation is resistant to all cleaning solvents in

accordance

with

“MIL-STD-202E,

method 215”,

and

“IEC 60068-2-45”.

Notes

3. Ohmic values (other than resistance range) are available on request.

TECHNICAL SPECIFICATIONS

DESCRIPTION

VALUE

PR01

PR02

PR03

Cu-lead

FeCu-lead

Cu-lead

FeCu-lead

0.22 Ω to 1 MΩ

0.33 Ω to 1 MΩ

1 Ω to 1 MΩ

0.68 Ω to 1 MΩ

1 Ω to 1 MΩ

Resistance tolerance and series

± 1 % (E24, E96 series); ± 5 % (E24 series); see notes 1 and 2

R < 1 Ω

0.6 W

1.2 W

−

1.6 W

−

1 Ω ≤ R

1 W

2 W

1.3 W

3 W

2.5 W

135 K/W

75 K/W

115 K/W

60 K/W

75 K/W

Temperature coefficient

Maximum permissible voltage

(DC or RMS)

350 V

500 V

750 V

Basic specifications

IEC 60115-1 and 60115-4

Climatic category (IEC 60068)

55/155/56

Stability after:

load

∆R/R max.: ± 5 % + 0.1 Ω

climatic tests

∆R/R max.: ± 3 % + 0.1 Ω

soldering

∆R/R max.: ± 1 % + 0.05 Ω