Littelfuse CH User Manual

Varistor Products

Surface Mount Varistors > CH Series

CH Varistor Series

Agency Approvals

Recognized under the components program of
Underwriters Laboratories.

AGENCY AGENCY FILE NUMBER

UL E320116

RoHS

Description

CH Series transient surge suppressors are small,
metal-oxide varistors (MOVs) manufactured in leadless
chip form. They are intended for use in a variety of
applications from low voltage DC to off-line board-level
protection. These devices, which have significantly
lower profiles than traditional radial lead varistors,
permit designers to reduce the size and weight and
increase the reliability of their equipment designs.

CH Series varistors are available in a voltage range from
14V to 275V (V

), and energy ratings up to 8J.

M(AC)RMS

See the Littelfuse Multilayer Suppressor Series also.

Features

• Lead–free

• Leadless, surface
mount chip in 5
x 8mm Size

• Supplied in tape and
reel or bulk pack

• No derating up to
125ºC ambient

• Voltage ratings

M(AC)RMS

14V to 275V

V

CH Series

Absolute Maximum Ratings

• For ratings of individual members of a series, see Device Ratings and Specifications chart

Continuous CH Series Units

Steady State Applied Voltage:

AC Voltage Range (V

DC Voltage Range (V

Transient:

Peak Pulse Current (ITM)

For 8/20μs Current (See Figure 2) 100 to 250 A

Single Pulse Energy Range

For 10/1000μs Current Wave (W

Operating Ambient Temperature Range (T

Storage Temperature Range (T

Temperature Coefficient (DV) of Clamping Voltage (V

CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

) -55 to +150 ºC

STG

) 14 to 275 V

M(AC)RMS

) 18 to 369 V

M(DC)

) 1.0 to 8.0 J

) -55 to +125 ºC

A

TM

) at Specified Test Current

C

<0.01 %/ºC

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.

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

69

Revised: May 8, 2013

CH Varistor Series

Varistor Products

Surface Mount Varistors > CH Series

Device Ratings and Specifications

Maximum Ratings (125ºC) Specifications (25ºC)

Varistor Voltage at 1 mA DC

Test Current

MIN V

N(DC)

Part

Number

Continuous Transient

V

RMS

V

M(AC)

V

V

M(DC)

DC

Energy

(10/1000μ s)

W

TM

Peak Current

(8/20μs)

I

TM

(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

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

Max Clamping Volt V

Test Current (8/20μs)

MAX V

at

C

Capacitance

C

I

P

f=1MHz

Typical

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.

CH Varistor Series

Figure 1

70

Revised: May 8, 2013

100

90

80

70

60

50

40

30

20

PERCENT OF RATED VALUE

10

0

-55 50 60 70 80 90 100 110 120 130 140 150

AMBIENT TEMPERATURE (

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

Specifications are subject to change without notice.

o

C)

© 2013 Littelfuse, Inc.