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.

Part

Number

Maximum Ratings (125ºC)

Specifications (25ºC)

Continuous

Transient

Varistor Voltage at 1 mA DC

Test Current

Max Clamping Volt V

Test Current (8/20μs)

Typical

Capacitance

V

RMS

V

DC

Energy

(10/1000μ s)

Peak Current

(8/20μs)

V

M(AC)

V

M(DC)

W

TM

I

TM

MIN

V

N(DC)

MAX

V

C

I

P

f=1MHz

(V)

(V)

(J)

(A)

(V)

(V)

(V)

(V)

(A)

(pF)

V22CH8

14

18 (Note 3)

1.0 (Note2)

100

18.7

22.0

26.0

47

5

1600

V27CH8

17

22

1.0

100

23.0

27.0

31.1

57

5

1300

V33CH8

20

26

1.0

100

29.5

33.0

36.5

68

5

750

V39CH8

25

31

1.0

100

35.0

39.0

43.0

79

5

700

V47CH8

30

38

1.2

100

42.0

47.0

52.0

92

5

650

V56CH8

35

45

1.4

100

50.0

56.0

62.0

107

5

600

V68CH8

40

56

1.5

100

61.0

68.0

75.0

127

10

500

V120CH8

75

102

2.0

250

108.0

120.0

132.0

200

10

300

V150CH8

95

127

3.0

250

135.0

150.0

165.0

250

10

250

V180CH8

115

153

4.0

250

162.0

180.0

198.0

295

10

120

V200CH8

130

175

4.0

250

184.0

200.0

228.0

340

10

110

V220CH8

140

180

5.0

250

198.0

220.0

242.0

360

10

105

V240CH8

150

200

5.0

250

212.0

240.0

268.0

395

10

100

V360CH8

230

300

6.0

250

324.0

360.0

396.0

595

10

70

V390CH8

250

330

7.0

250

354.0

390.0

429.0

650

10

60

V430CH8

275

369

8.0

250

389.0

430.0

473.0

710

10

50

Device Ratings and Specifications

NOTES:

1. Power dissipation of transients not to exceed 0.25W.

2. Energy rating for impulse duration of 30ms minimum to one half of peak current value.

3. Also rated to withstand 24V for 5 minutes.

4. All Littelfuse CH Series Varistors are recognized under UL file #E320116 as a recognized component.

5. The Typical Capacitance is for reference only

Current, Energy and Power Derating Curve

Continuous power dissipation capability is not an applicable

design requirement for a suppressor, unless transients

occur in rapid succession. Under this condition, the

average power dissipation required is simply the energy

(watt-seconds) per pulse times the number of pulses

per second. The power so developed must be within

the specifications shown on the Device Ratings and

Specifications Table for the specific device. Furthermore,

the operating values need to be derated at high tempera

tures as shown in this diagram. Because varistors can only

dissipate a relatively small amount of average power they

are, therefore, not suitable for repetitive applications that

involve substantial amounts of average power dissipation.

100

90

80

70

60

50

40

30

20

10

0

-55

50

60

70

80

90 100 110 120 130 140 150

Figure 1