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Metal-Oxide Varistors

(MOVs)

Industrial High Energy Thermally Protected Varistors > TMOV 34S Varistor Series

TMOV

34S Varistor Series

Description

RoHS

Agency Approvals

Agency

Standard

UL1449

QC42201-C001,

QC42201-A001,

IEC 60950-1 (Annex Q)

IEC 61051-1,

IEC 61051-2,

IEC 60950-1 (Annex Q)

Agency File Number

E320116

The Littelfuse TMOV

34S thermally protected varistor

series consists of a 34mm square format varistor element

(MOV) with an integral thermally activated element. This

element is designed to open in the event of overheating

due to abnormal overvoltage, limited current conditions.

Certain TMOV

34S varistor are offered with a "monitor"

lead which may be connected to signalling circuity to

indicate if the MOV has been disconnected from the circuit.

TMOV

34S varistor series offer quick thermal response due

to the close proximity of the integrated thermal element

to the MOV body. The integrated configuration also offers

lower inductance than most discrete solutions resulting

in improved clamping performance to fast over voltage

transients.

Features

•

IECQ-C BSI 15.0009

High peak current

rating to 40 kA

-55ºC to +85ºC

operating temp

RoHS Compliant and

Lead–free Available

Alternative design

available with

narrow 3mm wide

monitor (right) lead

•

Alternative design

available with 2 leads

only (no monitor lead)

•

40021525

•

Absolute Maximum Ratings

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

Applications

TMOV34S

Varistor Series

115 to 750

Continuous

Steady State Applied Voltage:

AC Voltage Range (V

M(AC)RMS

)

Transients:

Peak Pulse Current (I

)

For 8/20µs Current Wave, single pulse

Single Pulse Energy Range

For 2ms Current Wave

Operating Ambient Temperature Range (T

)

Storage Temperature Range (T

STG

)

Temperature Coefficient (a

) of Clamping

Voltage (V

) at Specified Test Current

Hi–Pot Encapsulation (Isolation Voltage

Capability)

COATING Insulation Resistance

Units

•

SPD Products

AC Panel Protection

Modules

UPS (Uninterruptable

Power Supply)

•

Inverters

AC/DC Power Supplies

up to 40,000

Additional Information

280 to 1200

-55 to + 85

-55 to + 125

<0.01

2500

1000

ºC

%/ºC

MΩ

Datasheet

Resources

Samples

* Contact your Littelfuse product representative to discuss alternatives and

for additional information.

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause per-

manent 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.

Specifications are subject to change without notice.

Revised: 09/14/17

Industrial High Energy Thermally Protected Varistors > TMOV 34S Varistor Series

Metal-Oxide Varistors

(MOVs)

TMOV

34S Series Ratings & Specifications - Standard 3 Lead Design

Maximum Rating (85°C)

Lead–free and

RoHS Compliant

Models

Continuous

Volts

Branding

TMOV34S111MP

TMOV34S131MP

TMOV34S141MP

TMOV34S151MP

TMOV34S181MP

TMOV34S201MP

TMOV34S251MP

TMOV34S271MP

TMOV34S301MP

TMOV34S321MP

TMOV34S331MP

TMOV34S351MP

TMOV34S391MP

TMOV34S421MP

TMOV34S461MP

TMOV34S481MP

TMOV34S511MP

TMOV34S551MP

TMOV34S571MP

TMOV34S621MP

TMOV34S661MP

TMOV34S681MP

TMOV34S751MP

Volts

MCOV

Surge

Arrester

M(AC)RMS

(V)

111

119

128

153

170

213

234

255

272

281

298

327

357

391

408

434

468

489

527

561

578

638

Transient

Energy

2ms

1 x Pulse

(J)

280

310

340

360

400

430

490

550

590

640

650

700

800

910

960

965

990

1010

1030

1100

1200

Peak

Current

8 x 20µs

N(DC)

Min

1 x Pulse

(A)

(V)

40000

162

184.5

198

216

256

288

351

387

423

459

476

504

558

612

643.5

675

738

770

819

900

945

980

1080

Specifications (25°C)

Maximum

Typical

Varistor Voltage

Clamping Volt V

Capaci-

at 1mA

at 200A Current tance

Test Current

(8/20µs)

1MHz

N(DC

Max

(V)

198

225.5

242

264

312

352

429

473

517

561

581

616

682

748

786.5

825

902

939

1001

1100

1155

1195

1320

(V)

305

345

375

405

488

540

650

730

780

830

855

910

1005

1130

1188

1240

1350

1415

1480

1589

1720

1772

2000

(pF)

11500

10000

9000

8000

6800

6500

5000

4500

4050

3800

3700

3500

3300

3000

2800

2700

2500

2250

2200

2100

2000

1970

1800

Part Number

TMOV34S111MP

TMOV34S131MP

TMOV34S141MP

TMOV34S151MP

TMOV34S181MP

TMOV34S201MP

TMOV34S251MP

TMOV34S271MP

TMOV34S301MP

TMOV34S321MP

TMOV34S331MP

TMOV34S351MP

TMOV34S391MP

TMOV34S421MP

TMOV34S461MP

TMOV34S481MP

TMOV34S511MP

TMOV34S551MP

TMOV34S571MP

TMOV34S621MP

TMOV34S661MP

TMOV34S681MP

TMOV34S751MP

M(AC)RMS

M(DC)

(V)

115

130

140

150

180

200

250

275

300

320

330

350

385

420

460

480

510

550

575

620

660

680

750

(V)

150

175

188

200

240

265

330

369

400

420

435

460

506

560

610

640

675

700

730

800

850

890

970

Notes :

Same ratings and specifications apply to 2 leaded alternative design. Replace 'M' with 'E' in part number. Refer to Part Numbering System at the end of this document.

Specifications are subject to change without notice.

Revised: 09/14/17

Metal-Oxide Varistors

(MOVs)

Industrial High Energy Thermally Protected Varistors > TMOV 34S Varistor Series

Ratings & Specifications - Alternative 2 Lead Design

Maximum Rating (85°C)

Continuous

Volts

Branding

TMOV34S111EP

TMOV34S131EP

TMOV34S141EP

TMOV34S151EP

TMOV34S181EP

TMOV34S201EP

TMOV34S251EP

TMOV34S271EP

TMOV34S301EP

TMOV34S321EP

TMOV34S331EP

TMOV34S351EP

TMOV34S391EP

TMOV34S421EP

TMOV34S461EP

TMOV34S481EP

TMOV34S511EP

TMOV34S551EP

TMOV34S571EP

TMOV34S621EP

TMOV34S661EP

TMOV34S681EP

TMOV34S751EP

M(AC)RMS

(V)

TMOV34S111EP

TMOV34S131EP

TMOV34S141EP

TMOV34S151EP

TMOV34S181EP

TMOV34S201EP

TMOV34S251EP

TMOV34S271EP

TMOV34S301EP

TMOV34S321EP

TMOV34S331EP

TMOV34S351EP

TMOV34S391EP

TMOV34S421EP

TMOV34S461EP

TMOV34S481EP

TMOV34S511EP

TMOV34S551EP

TMOV34S571EP

TMOV34S621EP

TMOV34S661EP

TMOV34S681EP

TMOV34S751EP

115

130

140

150

180

200

250

275

300

320

330

350

385

420

460

480

510

550

575

620

660

680

750

150

175

188

200

240

265

330

369

400

420

435

460

506

560

610

640

675

700

730

800

850

890

970

Volts

M(AC)

MCOV

Surge

Arrester

M(AC)RMS

(V)

111

119

128

153

170

213

234

255

272

281

298

327

357

391

408

434

468

489

527

561

578

638

Transient

Energy

2ms

1 x Pulse

(J)

280

310

340

360

400

430

490

550

590

640

650

700

800

910

960

965

990

1010

1030

1100

1200

Peak

Current

8 x 20

µs

1 x Pulse

(A)

40000

Specifications (25°C)

Maximum

Typical

Varistor Voltage

Clamping Volt V

Capaci-

at 1mA

at 200A Current tance

Test Current

(8/20µs)

1MHz

N(DC)

Min

(V)

162

184.5

198

216

256

288

351

387

423

459

476

504

558

612

643.5

675

738

770

819

900

945

980

1080

N(DC

Max

(V)

198

225.5

242

264

312

352

429

473

517

561

581

616

682

748

786.5

825

902

939

1001

1100

1155

1195

1320

(V)

305

345

375

405

488

540

650

730

780

830

855

910

1005

1130

1188

1240

1350

1415

1480

1589

1720

1772

2000

(pF)

11500

10000

9000

8000

6800

6500

5000

4500

4050

3800

3700

3500

3300

3000

2800

2700

2500

2250

2200

2100

2000

1970

1800

Lead–free

and RoHS

Compliant

Models

Part Number

Notes :

Same ratings and specifications apply to 3 leaded design. Replace 'E' with 'M' in part number. Refer to Part Numbering System at the end of this document.

Specifications are subject to change without notice.

Revised: 09/14/17

Industrial High Energy Thermally Protected Varistors > TMOV 34S Varistor Series

Metal-Oxide Varistors

(MOVs)

Typical time to open circuit under UL1449 Abnormal

Overvoltage Limited Current Test

Peak Current & Energy Derating Curve

100

PERCENT OF RATED VALUE

Typical

2.5A

0.5A

0.125A

-55

100

110

120

130

0.1

100

Time s

Figure 2

1000

10000

AMBIENT TEMPERATURE (ºC)

Figure 1

Note: The Industrial TMOV

34S varistor are intended, in

Abnormal Overvoltage Limited

design, to help facilitate

conjunction with appropriate enclosure

Current Test

SPD module compliance to UL 1449 (Abnormal Overvoltage

Limited Current Requirements). Under these extreme abnormal

overvoltage conditions, the units will exhibit substantial heating

and potential venting prior to opening. Modules should be

designed to contain this possibility. Application testing is strongly

recommended.

Figure 4:

Typical time to open circuit under UL1449

For applications exceeding 85ºC ambient temperature, the peak

surge current and energy ratings must be reduced as shown.

Pulse Rating Curve

50,000

20,000

5,000

10,000 15

SURGE CURRENT (A)

2,000

1,000

500

200

100

INDEFINITE

100

1,000

IMPULSE DURATION ( µs)

10,000

Figure 3

V–I Characteristic Curves

10000

FIGURE 6. SURGE CURRENT RATING CURVES FOR

HB34, HF34 and HG34

Maximum Clamping Voltage

TA = -55 C to 85C

Voltage -

VOLTS

V511

V551

V571

V751

V661

V681

1000

V481

V141 V131

V461

V421

100

1mA

10mA

100mA

10A

100A

1000A

V111

V151

10000A

100000A

Figure 4

Specifications are subject to change without notice.

Revised: 09/14/17

Current - AMPS

V391

V351 V331 V321 V301 V271

V251 V201 V181

Metal-Oxide Varistors

(MOVs)

Industrial High Energy Thermally Protected Varistors > TMOV 34S Varistor Series

Lead Configurations

TMOV

34S Varistor "E" 2-Lead Varistor

Thermal

Fuse

Element

Line

Line Fuse

To Protected Circuit

TMOV

34S Varistor "M" 3-Lead Varistor

Thermal

Fuse

Element

Monitor Lead

MOV

Note: MOVs are non-polarized passive elements

TMOV34S “M”

Varistor

Monitor

LED

Lead

TMOV 34S Varistor Application Examples

Neutral

The application examples below show how the monitor lead on the TMOV

34S varistor can be used to indicate that the

Figure Application example 1

thermal element has been opened. This signifies that the circuit is no longer protected from transients by the MOV.

Line

Application Example 1

In this case, the LED is normally on, and is off when the

thermal element opens.

Line

Line Fuse

To Protected Circuit

Application Example 3

Line Fuse

TMOV34S “M”

Varistor

Line

LED

This circuit illustrates the use of the monitoring lead of

TMOV34S “M”

the TMOV

34S varistor to ensure that equipment is only

Varistor

operated when overvoltage protection

OPTOCOUPLER

In normal

present.

operation the load switch relay solenoid is powered via the

TO STATUS

ANNUNCIATOR

LIGHT/ALARM

monitor lead of the TMOV 34S varistor. In the event of the

Neutral

thermal element being activated, the relay will de-activate,

cutting power to the protected circuit and the fault LED will

Figure 2. Application example 2

illuminate.

Line

Line Fuse

Load Switch Relay

(loss of protection)

"Load Powered"

neon lamp

Line Fuse

Neutral

TMOV34S “M”

Figure 1. Application example 1

Varistor

LED

To Protected Circuit

Application Example 2

Line

Line Fuse

TMOV34S “M”

Varistor

Fault LED

(Normallyoff)

This circuit utilizes an optocoupler to provide

Neutral

galvanic isolations between the TMOV

34S

Figure

TMOV34S “M”

example 1

1. Application

varistor and the indicating or alarm circuitry.

Varistor

Line

Line Fuse

AC OPTOCOUPLER

To Protected Circuit

Neutral

Figure 3. Application example 3

Neutral

TMOV34S “M”

Figure 2. Application example 2

Varistor

AC OPTOCOUPLER

Line

Line Fuse

Neutral

Figure 2. Application example 2

Load Switch Relay

(loss of protection)

TO STATUS

ANNUNCIATOR

LIGHT/ALARM

"Load Powered"

neon lamp

TMOV34S “M”

Varistor

Line

Line Fuse

Fault LED

(Normallyoff)

Load Switch Relay

(loss of protection)

Varistor

Fault LED

(Normallyoff)

To Protected Circuit

Neutral

Disclaimer Notice - Information furnished is believed

"Load Powered"

to be accurate and reliable. However, users should independently evaluate the suitability of and

neon lamp

test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.

Figure 3. Application example 3

Read complete

TMOV34S “M”

Disclaimer Notice at

www.littelfuse.com/disclaimer-electronics.

To Protected Circuit

TO STATUS

ANNUNCIATOR

LIGHT/ALARM

Please note: Indicator circuits are provided as a

guideline only. Verification of actual indicator circuitry

is the responsibility of the end user. Component

values selected must be appropriate for the specific

AC line voltage service and application.

Specifications are subject to change without notice.

Revised: 09/14/17

Neutral