V111HB34 Datasheet, PDF (5/8 Pages) Littelfuse – Varistor Products - High Energy Industrial

Varistor Products
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
Power Dissipation Ratings
Peak Pulse Current Test Waveform
100
90
50
Figure 1
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.
10
O₁
T
T₁
T₂
TIME
Figure 2
0₁

7JSUVBM
0SJHJO
PG
8BWF
5


5JNF
GSPN

UP

PG
1FBL
T = Rise Time = 1.25 x T
1
T₂

%FDBZ
5JNF
Example - For an 8/20 μT
$VSSFOU
8BWFGPSN
8μs = T₁ = Rise Time
20μs = T₂

%FDBZ
5JNF
Clamping Voltage for HB34, HF34 and HG34 Series
10000
Maximum Clamping Voltage
HB34, HF34, and HG34 series
Voltage -
VOLTS
1000
V571
V511 ^V551
TA = -55 C to 85C
V661 V681
V751
V481
V441
V421
100
1mA
Figure 3
V111
V141 V131
V151
10mA
100mA
1A
10A
100A
1000A
10000A
Current - AMPS V391 V351 V331 V321 V301 V271 V251 V201 V181
100000A
Surge Current Rating Curves for HB34, HF34 and HG34 Series
50,000
20,000
10,000
1
2
10
5,000 ₁₀₂
2,000 ₁₀₃
1,000
10⁴
500
10⁵ ₁₀₆
200
100
50
20 ^INDEFINITE
10 ₂₀
Figure 4
100
1,000
IMPULSE DURATION (μs)
Hx34
10,000
/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.
©2011 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.
Revision: February 21, 2011
HB34, HF34 and HG34 Varistor Series