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V251HF34

P1-P3P4-P6P7-P8
Varistor Products
©2010 Littelfuse, Inc.
Revision: July 11, 2010
HB34, HF34 and HG34 Varistor Series
Industrial High Energy Terminal Varistors > HB34, HF34 & HG34 Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34 or /hf34 or /hg34.html
for current information.
HG34 Series Ratings & Specifications
Lead–free
and RoHS
Compliant Models
Model
Size
Disc
Dia.
(mm)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Varistor Voltage at 1mA
DC Test Current
Maximum
Clamping Voltage
V
C
at 200A
Current (8/20μs)
Typical
Capaci-
tance
V
RMS
V
%$
Energy
(2ms)
Peak
Current
8 x 20 μs
Part Number
V
M(AC)
V
.%$
W
TM
I
TM
Min V
/%$
Max V
C
f = 1MHz
(V) (V) (J) (A) (V) (V) (V) (V) (pF)
V111HG34 34 110 148 220 40,000
1
156 173  288 11,600
V131HG34 34 140 175 270 40,000
2
184 200 228 345 10,000
V141HG34 34 130 188  40,000
3
 220 248 375 
V151HG34 34 150 200 300 40,000
4
212 240 268 405 8,000
V181HG34 34 180 240 330 40,000 254 282 310 468 6,800
V201HG34 34 200 265 350 40,000 283 314 345 533 6,350
V251HG34 34 250 330 370 40,000 354   650 5,000
V271HG34 34 275 370 400 40,000  430 473 730 4,500
V301HG34 34 300 410 430 40,000 433 478 526 780 4,100
V321HG34 34 320 420 460 40,000 462 510 561 830 3,800
V331HG34 34 330 435 475 40,000 467  570 843 3,750
V351HG34 34 350 460 500 40,000  550 604  3,600
V331HG34 34 385 510 550 40,000 545 604 663 1,000 3,500
V421HG34 34 420 560 600 40,000 610 680 748 1,130 3,000
V441HG34 34 440 587 620 40,000 622   1,150 
V481HG34 34 480 640 650 40,000 670 750 825 1,240 2,700
V511HG34 34 510 675 700 40,000 735 820  1,350 2,500
V551HG34 34 550 710 755 40,000 778 864  1,404 
V571HG34 34 570 730 770 40,000 805  1000 1,480 2,200
V661HG34 34 660 850  40,000  1050 1160 1,720 2,000
V681HG34 34 680 875  40,000  1068 1173 1,777 
V751HG34 34 750  1050 40,000 1080 1200 1320 2,000 1,800
/PUF
 1FBLDVSSFOUBQQMJFTUPBQQMJDBUJPOTSBUFEVQUP7
RMS
1FBLDVSSFOUJTL"GPSBQQMJDBUJPOTHSFBUFSUIBO7
1FBLDVSSFOUBQQMJFTUPBQQMJDBUJPOTSBUFEVQUP7
RMS
1FBLDVSSFOUJTL"GPSBQQMJDBUJPOTHSFBUFSUIBO7
1FBLDVSSFOUBQQMJFTUPBQQMJDBUJPOTSBUFEVQUP7
RMS
1FBLDVSSFOUJTL"GPSBQQMJDBUJPOTHSFBUFSUIBO7
1FBLDVSSFOUBQQMJFTUPBQQMJDBUJPOTSBUFEVQUP7
RMS
1FBLDVSSFOUJTL"GPSBQQMJDBUJPOTHSFBUFSUIBO7
Varistor Products
©2010 Littelfuse, Inc.
Revision: July 11, 2010
HB34, HF34 and HG34 Varistor Series
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34.html or /hf34 or /hg34.thml
for current information.
HI–ENERGY MOV’S HBx/HFx/HGx Series
Should transients occur in rapid succession, the
average power dissipation result is simply the energy
(watt-seconds) per pulse times the number of pulses
per second. The power so developed must be within
UIFTQFDJmDBUJPOTTIPXOPOUIF%FWJDF3BUJOHTBOE
Specifications Table for the specific device. The operating
values must be derated as shown in above.
Power Dissipation Ratings
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK VALUE
Peak Pulse Current Test Waveform
Clamping Voltage for HB34, HF34 and HG34 Series
1000
10000
1mA 10mA 100mA 1A 10A 100A 10000A 100000A
Maximum Clamping Voltage
HB34, HF34, and HG34 series
TA = -55 C to 85C
Current - AMPS
Voltage -
VOLTS
V751
V681V661
V571
V551
V511
V391 V351 V331 V321 V271 V251 V201 V181
V151
V141
V 111
V131
V301
V481
V441
V421
100
1000A
Surge Current Rating Curves for HB34, HF34 and HG34 Series
Hx34
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
20 100 1,000 10,000
SURGE CURRENT (A)
IMPULSE DURATION (μs)
10
1
INDEFINITE
10
5
10
2
2
10
3
10
4
10
6
/05&*GQVMTFSBUJOHTBSFFYDFFEFEBTIJGUPG7
/%$
(at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of V
/%$
, may
result in the device not meeting the original published specifications, but it does not
prevent the device from continuing to function, and to provide ample protection.
0
1
7JSUVBM0SJHJOPG8BWF
55JNFGSPNUPPG1FBL
T
1
= Rise Time = 1.25 x T
T
2
%FDBZ5JNF
Example - For an 8/20 μT$VSSFOU8BWFGPSN
8μs = T
1
= Rise Time
20μs = T
2
%FDBZ5JNF
Figure 1
Figure 2
Figure 3 Figure 4
Varistor Products
©2010 Littelfuse, Inc.
Revision: July 11, 2010
HB34, HF34 and HG34 Varistor Series
Industrial High Energy Terminal Varistors > HB34, HF34 & HG34 Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34 or /hf34 or /hg34.html
for current information.
Operating/Storage
Temperature
-55°C to +85°C/-55°C to +125°C
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% Voltage
Thermal Shock
+85°C to -40°C 10 times
+/-10% Voltage
Solvent Resistance .*-o45%o.FUIPE'
Moisture Sensitivity -FWFM+o45%o$
Lead Material Tin-plated Copper
Soldering
Characteristics
4PMEFSBCJMJUZQFS.*-o45%o
Method 208E
Insulating Material
Cured, flame retardant epoxy polymer
NFFUT6-7oSFRVJSFNFOUT
Device Labeling -'1BSU/VNCFSBOEEBUFDPEF
Physical Specifications Environmental Specifications
Wave Solder Profile
0
50
100
150
200
250
300
00.511.522.5 33.54
TIME(MINUTES)
TEMPERATURE
(ºC)
Maximum Wave 240C
Lead–free Profile
0
50
100
150
200
250
300
00.511.522.5 33.54
TIME(MINUTES)
TEMPERATURE
(ºC)
Maximum Wave 260C
Non Lead–free Profile
Figure 5
Figure 6
P1-P3P4-P6P7-P8

V251HF34

Mfr. #:
Buy V251HF34
Manufacturer:
Littelfuse
Description:
Varistors HIGH ENERGY
Lifecycle:
New from this manufacturer.
Delivery:
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