VR25

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Vishay BCcomponents

Revision: 17-Aug-11

4

Document Number: 28732

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DERATING

The power that the resistor can dissipate depends on the

operating temperature.

APPLICATION INFORMATION

Hot-spot temperature rise (

T) as a function of dissipated

power

PULSE LOADING CAPABILITY

Maximum allowed peak pulse voltage in accordance with

IEC 60065, 14.1.a; 50 discharges from a 1 nF capacitor

Temperature rise (

T) at the lead end (soldering point) as a

function of dissipated power at various lead lengths after

mounting

70

100

50

0

0

50

100

155

- 55

P

max.

(%

P

0

0.1

0.3

0.2

P (W)

ΔT

(K)

50

0

10

20

30

40

4

6

8

10

20

10

1

R

(kV)

^

50

0

0.1

0.3

0

0.2

10

20

30

40

P (W)

∆T

(K)

5 mm

10 mm

15 mm