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UL 94V-0 flammability classification
DESCRIPTION
The foldback characteristic of this device eliminates the clamping
of the DC current, or the battery, used in telecom systems, so
latch-up is eliminated. Latch-up can occur with breakover devices
due to the conduction follow-on current supplied by the DC
system, after the device has responded to a transient.
With breakover devices, latch-up will happen more readily as the
ambient temperature rises because the holding current values will
fall with rising temperature.
The Foldbak eliminates this problem while still providing high
levels of protection.
Min 25.4
4.826
5.207
0.966 - 1.066
ABSOLUTE MAXIMUM RATINGS @25藲C
case temp (unless otherwise noted)
SYMBOL
PPP
PARAMETER
Peak Pulse Current
10x1000碌sec
8-20碌sec
Steady state power dissipation,
lead length 9.5mm, TL - 85藲C (note 1)
Junction temperature
Storage temperature
VALUE
2,200
20,000
5.0
-55 to 150
-55 to 150
Units
W
W
W
藲C
藲C
9.155
9.527
Min 25.4
PM (AV)
Tj
T stg
All dimensions in mm
Note 1. Mounted on copper pad area 40mm square
Characteristics @25藲C case temp (unless otherwise noted)
DEVICE Working Maximum Maximum Minimum
Maximum
TYPE voltage breakover leakage
foldback
Peak Pulse
Voltage current (Ir) voltage Vfb Current (lpp)
(Vr)
(Vbo)
@ Vr
@ Vcl Note 2
volts
FB120
FB160
120
160
volts
170
220
碌A(chǔ)
1.0
1.0
volts
55
110
amps
170
Ipp
Vfb
Ibo
Irm
Vbo
Vrm
220
Note 2. Using 10/1000碌S pulse
304
V-I Characteristic
w w w. l i t t e l f u s e . c o m
LITTELFUSE
1
