Varistor Products

©2010 Littelfuse, Inc.

Revision: August 30, 2010

CH Varistor Series

Surface Mount Varistors > CH Series

Specifications are subject to change without notice.

Please refer to www.littelfuse.com/series/CH.html for current information.

100

90

50

10

T

TIME

Peak Pulse Current Test Waveform

Clamping Voltage for V120CH8 – V430CH8

Clamping Voltage for V22CH8 – V68CH8

500

400

300

200

100

90

80

70

60

50

40

30

20

10

PEAK AMPERES (A)

10-3

10-2

10-1

100

101

102

103

V56CH8

V47CH8

V39CH8

V33CH8

V27CH8

V22CH8

MAXIMUM CLAMPING VOLTAGE

MODEL SIZE 5 x 8mm

22 TO 56VN(DC) RATING

TA = -55oC TO 125oC

V68CH8

4,000

3,000

2,000

1,000

900

800

700

600

500

400

300

200

100

10-3

10-2

10-1

100

101

102

103

104

V180CH8

V150CH8

V120CH8

V430CH8

V390CH8

V360CH8

V240CH8

V220CH8

V200CH8

PEAK AMPERES (A)

MAXIMUM CLAMPING VOLTAGE

MODEL SIZE 5 x 8mm

100 TO 430VN(DC) RATING

TA = -55oC TO 125oC

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

Surge Current Rating Curves for V22CH8 - V56CH8

500

200

50

20

10

5

2

1

0.2

0.5

100

20

100

1,000

10,000

IMPULSE DURATION

1

2

10

102

103

104

105

106

INDEFINITE

MODEL SIZE 5 x 8mm

V22CH8 - V56CH8

(μs)

20

100

1,000

10,000

IMPULSE DURATION

2,000

1,000

500

200

100

50

20

10

5

2

1

1

2

10

102

103

104

105

INDEFINITE

MODEL SIZE 5 x 8mm

V120CH8 - V430CH8

106

(μs)

Pulse Rating Curves

0

T = Time from 10% to 90% of Peak

T

T

Example:

For an 8/20 μs Current Waveform:

8μs = T

20μs = T

Surge Current Rating Curves for V120CH8 - V430CH8

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6