109
w w w . l i t t e l f u s e . c o m
Varistor Products
2
V
ARIST
OR
PR
ODUCTS
High Energy Industrial
DHB34 Varistor Series
The DHB34 Series of transient surge suppressors are industrial high-
energy Metal-Oxide Varistors (MOVs). They are designed to provide surge
suppression in the AC mains outdoor and service entrance
environment (distribution panels) of buildings. DHB34 applications also
include industrial heavy motors, controls, and power supplies such as
used in the oil-drilling, mining, and transportation fields, including HVAC
and motor/generator applications.
The DHB34 Series provides rigid terminals for through-hole solder
mounting on printed circuit boards, thereby eliminating the need for screw
mounting.
See Ratings and Specifications table for part numbers.
Features
Wide Operating Voltage Range
VM(AC)RMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110V to 750V
High Energy Absorption
Capability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .WTM = 220J to 1050J
High Peak Pulse Current
Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ITM = 40,000A*
Rigid Terminals for Secure Through-Hole Solder Mounting
No Derating Up to 85
o
C Ambient
AGENCY APPROVALS:
Recognized under the components program of
Underwriters Laboratories. Certified by CSA.
AGENCY FILE NUMBERS:
UL 1449, E75961, UL1414, E56529,
CSA LR91788.
* NOTE: Ratings are for each individual varistor element
in a dual assembly.
NEW
110
w w w . l i t t e l f u s e . c o m
Varistor Products
High Energy Industrial
DHB34 Varistor Series
Absolute Maximum Ratings
For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous:
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 to 750
V
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 to 970
V
Transient:
Peak Pulse Current (ITM)
For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,000
A
Single Pulse Energy Range
For 2ms Current Square Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 to 1050
J
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85
O
C
Storage Temperature Range (TSTG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125
O
C
Temperature Coefficient (
V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01
%/
O
C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent 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.
Device Ratings and Specifications
DHB34 SERIES UNITS
NOTE: Ratings are for each individual varistor element in dual assembly.
1. Average power dissipation of transients not to exceed 2.0W per varistor element (2 varistors per device).
2. 40kA capability depends on applications rated up to 115V . 30kA applies if > 115 V .
3. 40kA capability depends on applications rated up to 123V . 30kA applies if > 123 V .
4. 40kA capability depends on applications rated up to 132V . 30kA applies if > 132 V .
5. 40kA capability depends on applications rated up to 97V
RMS
. 30kA applies if > 97 V
RMS
.
RMS
RMS
RMS
RMS
RMS
RMS
MODEL
NUMBER
SIZE
MAXIMUM RATINGS (85
o
C)
SPECIFICATIONS (25
o
C)
CONTINUOUS
TRANSIENT
VARISTOR VOLTAGE
AT 1mA DC TEST
CURRENT
MAXIMUM
CLAMPING
VOLTAGE
(V
C
) AT 200A
(8/20
s)
TYPICAL
CAPACI-
TANCE
V
RMS
V
DC
ENERGY
(2ms)
PEAK
CURRENT
(8/20
s)
V
M(AC)
V
M(DC)
W
TM
I
TM
MIN
V
N(DC)
MAX
V
C
f = 1MHz
(mm)
(V)
(V)
(V)
(A)
(V)
(V)
(V)
(V)
(pF)
40,000
V131DHB34
V141DHB34
34
34
130
140
175
188
270
291
40,000
184
198
200
220
228
248
345
375
10,000
V151DHB34 34
150
200
300
212
240
268
405
8,000
9,000
V251DHB34
34
250
330
370
354
390
429
650
5,000
V271DHB34
34
275
369
400
40,000
389
430
473
730
4,500
V321DHB34
34
320
420
460
40,000
462
510
561
830
3,800
V331DHB34
34
330
435
475
40,000
467
519
570
843
3,750
V351DHB34
34
350
460
500
40,000
495
550
604
894
3,600
2
V111DHB34
34
110
148
220
40,000
156
173
190
288
11,600
1
40,000
3
40,000
4
V181DHB34 34
180
240
330
254
282
310
468
6,800
40,000
V201DHB34 34
200
265
350
283
314
345
533
6,350
40,000
V301DHB34
34
300
410
430
40,000
433
478
526
780
4,100
111
w w w . l i t t e l f u s e . c o m
Varistor Products
2
V
ARIST
OR
PR
ODUCTS
High Energy Industrial
DHB34 Varistor Series
NOTE: Ratings are for each individual varistor element in dual assembly.
1. Average power dissipation of transients not to exceed 2.0W per varistor element (2 varistors per device).
2. 40kA capability depends on applications rated up to 115V . 30kA applies if > 115 V .
3. 40kA capability depends on applications rated up to 123V . 30kA applies if > 123 V .
4. 40kA capability depends on applications rated up to 132V . 30kA applies if > 132 V .
5. 40kA capability depends on applications rated up to 97V
RMS
. 30kA applies if > 97 V
RMS
.
RMS
RMS
RMS
RMS
RMS
RMS
MODEL
NUMBER
SIZE
MAXIMUM RATINGS (85 oC)
SPECIFICATIONS (25oC)
CONTINUOUS
TRANSIENT
VARISTOR VOLTAGE
AT 1mA DC TEST
CURRENT
MAXIMUM
CLAMPING
VOLTAGE
(VC) AT 200A
(8/20
s)
TYPICAL
CAPACI-
TANCE
VRMS
VDC
ENERGY
(2ms)
PEAK
CURRENT
(8/20
s)
VM(AC)
VM(DC)
WTM
ITM
MIN
VN(DC)
MAX
VC
f = 1MHz
(mm)
(V)
(V)
(V)
(A)
(V)
(V)
(V)
(V)
(pF)
V421DHB34
34
420
560
600
40,000
610
680
748
1,130
3,000
V441DHB34
34
440
585
630
40,000
622
691
759
1,147
2,900
V391DHB34
34
385
510
550
40,000
545
604
663
1,000
3,500
V481DHB34
34
480
640
650
40,000
670
750
825
1,240
2,700
V511DHB34
34
510
675
700
40,000
735
820
910
1,350
2,500
V551DHB34
34
550
710
755
40,000
778
864
949
1,404
2,390
V571DHB34
34
575
730
770
40,000
805
910
1000
1,480
2,200
V661DHB34
34
660
850
900
40,000
940
1050
1160
1,720
2,000
V681DHB34
34
680
875
925
40,000
962
1068
1173
1,777
1,900
V751DHB34
34
750
970
1050
40,000
1080
1200
1320
2,000
1,800
Device Ratings and Specifications
112
w w w . l i t t e l f u s e . c o m
Varistor Products
High Energy Industrial
Power Dissipation Ratings
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
the specifications shown on the Device Ratings and Specifications table
for the specific device. The operating values must be derated as shown
in Figure 1.
Transient V-I Characteristics Curves
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK V
ALUE
O
1
= Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T
1
= Virtual Front time = 1.25 t
T
2
= Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20
s Current Waveform:
8
s = T
1
= Virtual Front Time
20
s = T
2
= Virtual Time to Half Value
1000
10000
0.001
0.01
0.1
1
10
100
10000
100000
Maximum Clamping Voltage
DHB34 Series
110 to 750V AC Rating
TA = -55 C to 85C
Current - AMPS
Voltage
Volts
V751
V681
V661
V571
V551
V511
V391
V351 V331 V321
V271
V251 V201 V181
V151
V141
V111
V131
V301
V481
V441
V421
100
1000
DHB34 Varistor Series
FIGURE 3. CLAMPING VOLTAGE FOR DHB34 SERIES
113
w w w . l i t t e l f u s e . c o m
Varistor Products
2
V
ARIST
OR
PR
ODUCTS
High Energy Industrial
DHB34 Varistor Series
FIGURE 4. SURGE CURRENT RATING CURVES FOR
V131DHB34 - V751DHB34
DISC SIZE 34mm
V131DHB34 - V751DHB34
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 (
s)
10
1
INDEFINITE
10
5
10
2
2
10
3
10
4
10
6
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current)
of more than 10% could result. This type of shift, which normally results in a
decrease of VN(DC), may result in the device not meeting the original pub-
lished specifications, but it does not prevent the device from continuing to
function, and to provide ample protection.
Pulse Rating Curves
Dia 3.81 +/- 0.08
7.06 +/- 0.2
0.51 typ
12.7 typ
3.7 typ
56 max
S2
S1
T max
25.4 +/- 0.5
37.5 max
TABLE OF DIMENSIONS -
THICKNESS AND TERMINAL OFFSETS
TYPE
T MAX
S1
+/- 1.15 mm
V131DHB34
7.8
V141DHB34
8.2
V151DHB34
8.8
V251DHB34
7.8
V271DHB34
8.7
V301DHB34
8.9
V321DHB34
9.3
V421DHB34
11.3
V481DHB34
12.2
V511DHB34
13.4
V571DHB34
V661DHB34
V751DHB34
14.8
S2
+/- 2.30mm
5.70
2.85
V111DHB34
7.6
5.50
2.65
6.00
3.00
6.30
3.15
6.00
3.00
V181DHB34
9.0
6.50
3.25
V201DHB34
9.2
6.70
3.35
6.50
3.25
7.00
3.50
7.24
3.66
V331DHB34
9.5
7.40
3.70
9.00
4.50
V441DHB34
11.5
9.10
4.55
V391DHB34
11.2
8.90
4.45
V351DHB34
10.5
8.20
4.10
9.60
4.80
10.50
5.25
V551DHB34
14.6
11.40
5.70
11.60
5.80
13.30
6.65
17.20
V681DHB34
14.00
7.00
17.5
14.70
7.35
18.20
VARISTOR DESIGNATOR
MAX AC
RMS
WORKING VOLTAGE
(FIRST SIGNIFICANT DIGITS) V
M(AC)
DISC SIZE (mm)
SERIES DESIGNATOR
V
M(AC)
VOLTAGE DECADE MULTIPLIER
V 13 1 DHB 34
Ordering Information
Mechanical Dimensions
Terminals Configuration: Terminals A & B are connected to one varistor
element. Terminals B & C connected to second varistor element.
Terminal materials: Tin Plated over copper.
PDF 
ZIP