Varistor Products

©2010 Littelfuse, Inc.

Revision: September 22, 2010

ZA Varistor Series

Radial Lead Varistors > ZA Series

Specifications are subject to change without notice.

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

V360ZA05(P) - V750ZA05(P)

3000

2000

1000

500

PEAK AMPERES (A)

0.01

0.1

1

10

100

1000

0.001

0.0001

V750ZA05(P)

V715ZA05(P)

V680ZA05(P)

V620ZA05(P)

V470ZA05(P)

V430ZA05(P)

V390ZA05(P)

V360ZA05(P)

MAX CLAMPING VOLTAGE

MODEL SIZE 5mm

Should transients occur in rapid succession, 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 temperatures as

shown in the diagram above. 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.

Power Dissipation Ratings

600

500

400

300

200

100

90

80

70

60

50

40

30

20

PEAK AMPERES (A)

MAX CLAMPINGVOLTAGE

MODEL SIZE 5mm

10

V68ZA05(P)

V56ZA05(P)

V47ZA05(P)

V39ZA05(P)

V33ZA05(P)

V27ZA05(P)

V22ZA05(P)

V18ZA05(P)

V12ZA05(P)

V8ZA05(P)

Maximum Clamping Voltage for 5mm Parts

Peak Pulse Current Test Waveform

V8ZA05(P) - V68ZA05(P)

V82ZA05(P) - V33ZA05(P)

2000

1000

500

200

PEAK AMPERES (A)

0.01

0.1

1

10

100

1000

100

0.001

0.0001

V100ZA05(P)

V82ZA05(P)

MAX CLAMPING VOLTAGE

MODEL SIZE 5mm

V330ZA05(P)

V270ZA05(P)

V240ZA05(P)

V220ZA05(P)

V205ZA05(P)

V180ZA05(P)

V150ZA05(P)

V120ZA05(P)

0

1

T

T

Example - For an 8/20 μ

8μs = T

20μs = T

100

90

80

70

60

50

40

30

20

10

0

-55 50

60

70

80

90 100 110 120 130 140 150

100

90

50

10

T

TIME

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5