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V111DHB34 Datasheet(PDF) 4 Page - Littelfuse

Part No. V111DHB34
Description  Varistor Products - High Energy Industrial
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Manufacturer  LITTELFUSE [Littelfuse]
Direct Link  http://www.littelfuse.com
Logo LITTELFUSE - Littelfuse

V111DHB34 Datasheet(HTML) 4 Page - Littelfuse

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www .littelfuse .com
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
O1
T
T1
T2
TIME
O1 = Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T1 = Virtual Front time = 1.25 • t
T2 = Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20µs Current Waveform:
8µs = T1 = Virtual Front Time
20µs = T2 = 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


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