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Varistor Products

2

High Energy Industrial

DA/DB Varistor Series

Pulse Rating Curves

NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than ±10% could result.This type of shift, which normally results in a decrease of VN(DC),

may result in the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection.

FIGURE 5. SURGE CURRENT RATING CURVES FOR

V131DA40, V131DB40 - V751DA40, V751DB40

DISC SIZE 40mm

V131DA40 - V751DA40

50,000

20,000

10,000

5,000

2,000

1,000

500

200

100

50

20

10

20

100

1,000

10,000

IMPULSE DURATION ( µs)

V131DB40 - V751DB40

2

1

INDEFINITE

10

DA SERIES

Dimensions in millimeters and (inches).

A

4.3mm

(0.170)

15mm (0.59)

“A”DIMENSION:

FILISTER HEAD SCREW - 51mm (2.01)

PAN HEAD SCREW - 53mm (2.09)

23mm ± 1mm

(0.90 ± 0.04)

57mm

(2.24)

67mm

(2.64)

62mm

(2.44)

M4 INTERNATIONAL

THREAD

4.5mm (0.18)

Mechanical Dimensions

DB SERIES

60.3

(2.37)

44.45 ± 0.75

(1.75 ± 0.03)

46.8

(1.84)

25.4 ± 0.75

(1.00 ± 0.03)

ALL DIMENSIONS ARE MAXIMUM

EXCEPT WHERE NOTED

HOLES 0.23 THRU

BORE 0.370 x 0.370 DP

12.7

(0.50)

6.60

(0.26)

2 HOLES

6.60

(0.26)

41

(1.61)

40.5

(1.6)

1.6

(0.06)

23

(0.90)

12.7

(0.50)