TMOV25SP385M Littelfuse Inc, TMOV25SP385M Datasheet - Page 175

TMOV VARISTOR PB FREE 25S

TMOV25SP385M

Manufacturer Part Number
TMOV25SP385M
Description
TMOV VARISTOR PB FREE 25S
Manufacturer
Littelfuse Inc
Series
iTMOV®r
Datasheets

Specifications of TMOV25SP385M

Varistor Voltage
682V
Current-surge
20kA
Number Of Circuits
1
Maximum Ac Volts
385VAC
Energy
430J
Package / Case
Disc 25mm 3-Lead
Suppressor Type
Varistor
Peak Surge Current @ 8/20µs
20000A
Varistor Case
25mm DISC
Clamping Voltage Vc Max
1010V
Peak Energy (10/1000us)
430J
Voltage Rating Vdc
682V
Voltage Rating Vac
385V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Maximum Dc Volts
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34.html or /hf34 or /hg34.thml
for current information.
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 above.
Clamping Voltage for HB34, HF34 and HG34 Series
V421
V441
Figure 3
V481
Voltage -
VOLTS
Figure 1
10000
1000
100
1mA
Maximum Clamping Voltage
HB34, HF34, and HG34 series
V511
10mA
Current - AMPS
V551
100mA
V571
1A
V391
V351 V331 V321
10A
V661
V681
100A 
V301
TA = -55 C to 85C
V271
V751
Varistor Products
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
1000A
V251 V201 V181
V141
10000A
V151
V131
V111
Revision: November 5, 2009
100000A
171
NOTE: If pulse ratings are exceeded, a shift of V
+/-10% could result. This type of shift, which normally results in a decrease of V
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.
Peak Pulse Current Test Waveform
Surge Current Rating Curves for HB34, HF34 and HG34 Series
Figure 4
Figure 2
50,000
20,000
10,000
5,000
2,000
1,000
0
T = Time from 10% to 90% of Peak
T
T
Example - For an 8/20 μs Current Waveform:
500
200
100
1
1
2
50
20
10
= Virtual Origin of Wave
= Rise Time = 1.25 x T
= Decay Time
O
20
100
1
8μs = T
20μs = T
10
10
10
10
90
10
INDEFINITE
0
2
2
3
4
1
1
2
= Rise Time
100
= Decay Time
T
T
IMPULSE DURATION (μs)
1
T
2
N(DC)
10
5
(at specified current) of more than
HB34, HF34 and HG34 Varistor Series
10
1,000
6
TIME
Hx34
10,000
N(DC)
, may

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