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Varistor Products

©2009 Littelfuse, Inc.

Revision: January 15, 2010

ML Varistor Series

Surface Mount Multilayer Varistors (MLVs) > ML Series

Specifications are subject to change without notice.

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

Peak Current and Energy Derating Curve

When transients occur in rapid succession, the average

power dissipation is 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. For applications exceeding 125°C ambient

temperature, the peak surge current and energy ratings

must be derated as shown below.

100

80

60

40

20

0

-55

50

60

70

80

90

100

110

120

130 140 150

T1

T2

100

50

0

O1

TIME

T

Peak Pulse Current Test Waveform for Clamping Voltage

Limit V-I Characteristic for V9MLA0402L

Limit V-I Characteristic for V5.5MLA0402 to V18MLA0402

Limit V-I Characteristic for V3.5MLA0603 to V30MLA0603

1

10

100

1μA

10μA

100μA

1mA

10mA

1A

10A

100A

V9MLA0402L

V5.5MLA0402L

Current (A)

Limit V-I Characteristic for V3.5MLA0805L to V30MLA0805L

1

10

100

1000

10μA

100μA

1mA

10mA

100mA

1A

10A

100A

V5.5MLA0805L

V3.5MLA0805L

V9MLA0805L

V12MLA0805L

V14MLA0805L

V18MLA0805L

V26MLA0805L

V30MLA0805L

Current (A)

1

10

100

1000

10μA

100μA

1mA

10mA

100mA

1A

10A

100A

V30MLA0603

V26MLA0603

V18MLA0603

V14MLA0603

V9MLA0603, V9MLA0603L

V5.5MLA0603, V5.5MLA0603L

V3.5MLA0603

Current (A)

1

10

100

1μA

10μA

100μA

1mA

10mA

1A

10A

100A

Current (A)

V18MLA0402

V14MLA0402

V9MLA0402

V5.5MLA0402

0

T = Time from 10% to 90% of Peak

T

T

Example - For an 8/20

μs Current Waveform:

8

μs = T

20

μs = T

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6