© 2014 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 11/12/14

Varistor Products

Part Number

Branding

Maximum Rating (85°C)

Specifications (25°C)

Continuous

Transient

Varistor Voltage

at 1mA DCTest

Current

Maximum

Clamping

Voltage

8 x 20

µs

Typical

Capacitance

RMS

Volts

DC

Volts

Energy

2ms

Peak Current

8 x 20

µs

V

M(AC)

V

M(DC)

W

TM

I

TM

1 x Pulse

I

TM

2 x Pulse

V

NOM

Min

V

NOM

Max

V

C

I

PK

f = 1MHz

(V)

(V)

(J)

(A)

(A)

(V)

(V)

(V)

(A)

(pF)

V20E460P

P20V460

460

615

360

10000

6500

675

825

1240

100

400

V07E510P

P7V510

510

670

52

1750

1200

738

902

1355

10

40

V10E510P

P10V510

510

670

92

3500

2500

738

902

1355

25

110

V14E510P

P14V510

510

670

185

6000

4500

738

902

1355

50

200

V20E510P

P20V510

510

670

365

10000

6500

738

902

1355

100

350

V10E550P

P10V550

550

745

95

3500

2500

819

1001

1500

25

100

V14E550P

P14V550

550

745

190

6000

4500

819

1001

1500

50

180

V20E550P

P20V550

550

745

370

10000

6500

819

1001

1500

100

300

V10E625P

P10V625

625

825

100

3500

2500

900

1100

1650

25

90

V14E625P

P14V625

625

825

200

6000

4500

900

1100

1650

50

160

V20E625P

P20V625

625

825

400

10000

6500

900

1100

1650

100

250

NOTE: 1. Average power dissipation of transients should not exceed 0.25W, 0.4W, 0.6W and 1.0W for 7mm, 10mm, 14mm, and 20mm model sizes, respectively.

Should 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

developedmustbewithinthespecificationsshownonthe

DeviceRatingsandSpecificationsTableforthespecific

Current Energy and Power Dissipation Ratings

Peak Pulse Current Test Waveform

FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM

100

90

50

10

T

TIME

T = Time From 10% to 90% of Peak

Example: For an 8/20µs Current Waveform:

0

T = Time from 10% to 90% of Peak

T

T

Example - For an 8/20

µs Current Waveform:

8µs = T

20µs = T

100

90

80

70

60

50

40

30

20

10

0

-55

50

60

70

80

90

100110

120130 140150

FIGURE 1. CURRENT, ENERGY AND POWER DERATING

CURVE

Figure 1A - Power Derating for Epoxy Coated

Figure 2

FIGURE 1. CURRENT, ENERGY AND POWER DERATING

CURVE

100

90

80

70

60

50

40

30

20

10

0

-55

50

60

70

80

90

100110 120130 140150

device. The operating values of a MOV need to be derated

at high temperatures as shown above. Because varistors

only dissipate a relatively small amount of average power

they are not suitable for repetitive applications that involve

substantial amounts of average power dissipation.

Figure 1B - Power Derating for Phenolic Coated