Document Number: 28733

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Revision: 24-Feb-04

3

VR37

High Ohmic/High Voltage Resistors

Vishay BCcomponents

The power that the resistor can dissipate depends on the operating

temperature.

Derating

Pulse Loading Capability

70

100

50

0

0

50

100

155

−55

4

6

8

10

20

10

1

(MΩ)

(kV)

^

Maximum allowed peak pulse voltage in accordance with

“IEC 60065 chapter 14.1”

; 50 discharges from a 1 nF capacitor

charged to

; 12 discharges/minute (drift ∆R/R ≤ 2 %).

Application Information

0

0.4

1.2

0

0.8

20

40

60

80

P (W)

∆T

(K)

Hot-spot temperature rise (∆T) as a function of dissipated power.

0

0.4

1.2

0

0.8

10

20

30

40

50

P (W)

5 mm

10 mm

15 mm

∆T

(K)

Temperature rise (∆T) at the lead end (soldering

point) as a function of dissipated power at various

lead lengths after mounting.