© 2017 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 09/14/17

with appropriate enclosure design, to help facilitate SPD module

compliance to UL 1449, 3rd Edition Section 39.4 (abnormal

overvoltage limited current requirements). Under these extreme

abnormal overvoltage conditions, some units will exhibit substantial

heating, arcing and venting prior to opening. Modules should be

designed to contain this possibility. Application testing is strongly

recommended.

Thermal Characteristics

* Figure 4:Typical time to open circuit under UL1449

Abnormal Overvoltage Limited CurrentTest

0.1

1

10

10

100100010000

Time(s)

0.125A

0.5A

2.5A

5A

Typical

100

1000

10000

0.000001 0.000010.0001 0.001 0.01

0.11

10

1001000 10000

Peak Current (A)

175V

150V

140V

130V

320V

300V

275V

250V

230V

Figure 6: V-I Characteristic Curves for 14mm Types

420V

385V

115V

Maximum Leakage Current

Maximum Clamping Voltage

200V

460V

510V

550V

575V

625V

750V

Maximum Clamping Voltage for 14mm Parts

Maximum Clamping Voltage for 20mm Parts

100

1000

10000

0.000001 0.000010.0001 0.0010.010.1

110100

1000 10000

Peak Current (A)

175V

150V

140V

130V

320V

275V

250V

230V

Figure 7: V-I Characteristic Curves for 20mm Types

420V

385V

115V

Maximum Leakage Current

Maximum Clamping Voltage

200V

460V

510V

550V

575V

625V 750V

300V

Figure 1

Figure 3

Figure 4

Ratings & Specifications

Lead–free And RoHS

Compliant Models

Lead–free and RoHS

Compliant Models

Disc

Diameter

Maximum Rating (85°C)

Specifications (25°C)

Continuous

Transient

Varistor Voltage

at 1mATest

Current

Maximum

Clamping

Voltage 8/20

µs

Typical

Capaci-

tance

f = 1MHz

AC

Volts

DC

Volts

Energy

2ms

Peak Surge

Current 8/20

µs

Part

Number

Branding

Part

Number

Branding

V

M(AC)RMS

V

M(DC)

W

TM

I

Pulse

I

Pulse

V

N(DC)

Min

V

V

C

I

PK

C

(mm)

(V)

(V)

(J)

(A)

(A)

(V)

(V)

(A)

(pF)

TMOV14RP575E P4T575E TMOV14RP575M P4T575M

14

575

730

195

6000

4500

857

1047

1568

50

170

TMOV20RP575E P2T575E TMOV20RP575M P2T575M

20

575

730

375

10000

6500

857

1047

1568

100

275

TMOV14RP625E P4T625E TMOV14RP625M P4T625M

14

625

825

200

6000

4500

900

1100

1650

50

160

TMOV20RP625E P2T625E TMOV20RP625M P2T625M

20

625

825

400

10000

6500

900

1100

1650

100

250

TMOV14RP750E P4T750E TMOV14RP750M P4T750M

14

750

970

210

6000

4500 1080

1320

1980

50

140

TMOV20RP750E P2T750E TMOV20RP750M P2T750M

20

750

970

480

10000

6500 1080

1320

1980

100

175

100

80

60

40

20

0

-55

50

60

70

80

90

100110

120130

Current, Energy, Power Derating Curve

For applications exceeding 85°C ambient temperature, the peak

surge current and energy ratings must be reduced as shown

above.

Figure 2