Littelfuse TMOV 34S Varistor Series Instrukcja Użytkownika Pobierz pdf (Strona 5)

227

Revised: December 16, 2013

Varistor Products

TMOV

34S Varistor Series

Industrial High Energy Thermally Protected Varistors > TMOV

34S Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/tmov34s.html for current information.

Hi–EnErgy MoV’s

TMOV

34S Series

Pulse Rating Curve

FIGURE 6. SURGE CURRENT RATING CURVES FOR

HB34, HF34 and HG34

Hx34

50,000

20,000

10,000

5,000

2,000

1,000

500

200

100

20 100 1,000 10,000

SURGE CURRENT (A)

IMPULSE DURATION ( µs)

INDEFINITE

Peak Current & Energy Derating Curve

Typical time to open circuit under UL1449 Abnormal

Overvoltage Limited Current Test

* Figure 4: Typical time to open circuit under UL1449

Abnormal Overvoltage Limited Current Test

10 100 1000 100

Time s

0.125A

0.5A

2.5A

Typical

V–I Characteristic Curves for TMOV

34S Varistor

1000

10000

1mA 10mA 100mA 1A 10A 100A 10000A 100000A

TA = -55 C to 85C

V751

V681V661

V571

V551

V511

V391 V351 V331 V321 V271 V251 V201V181

V151

V141

V111

V131

V301

V481

V461

V421

100

1000A

Maximum Clamping Voltage

TMOV34S series

Current - AMPS

Voltage -

VOLTS

Note:TheIndustrialTMOV

Series TMOV

34S devices

are intended, in conjunction with appropriate enclosure

design,tohelpfacilitateSPDmodulecomplianceto

UL1449,Section37.4(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.

Forapplicationsexceeding85ºCambienttemperature,thepeak

surge current and energy ratings must be reduced as shown.

For applications exceeding 85˚C ambient

temperature, the peak surge current and energy

ratings must be reduced as shown in Figure 5.

Figure 5: Peak Current & Energy Derating Curve

100

-55 50 60 70 80 90 100 110 120 130

AMBIENT TEMPERATURE (ºC)

PERCENT OF RATED VALU

Figure 1

Figure 2

Figure 3

Figure 4

1 2 3 4 5 6 7 8

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