Littelfuse FB160 Silicon avalanche diodes - axial leaded telecommunications transient voltage suppressor Datasheet

Silicon Avalanche Diodes
Axial Leaded Telecommunications Transient Voltage Suppressors
FOLDBAK™ SERIES
Designed to protect sensitive telecommunications electronics from
transients which originate from induced lightning, power cross
and inductive load switching etc., especially where breakover
devices would cause nuisance latch-up.
Typical equipment would be: line cards, PABX, modems,
multiplexers and NTDs.
FEATURES
• Foldback characteristics
• 2200 watts Peak Power rated with 10/1000µS pulse
• 30,000 watts Peak Pulse Power based on 8/20µS
• 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.
0.966 - 1.066
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
ABSOLUTE MAXIMUM RATINGS @25˚C
case temp (unless otherwise noted)
SYMBOL
PPP
PM (AV)
9.155
9.527
PARAMETER
Peak Pulse Current
10x1000µsec
8-20µsec
Steady state power dissipation,
lead length 9.5mm, TL - 85˚C (note 1)
VALUE
Units
2,200
20,000
W
W
5.0
W
Tj
Junction temperature
-55 to 150
˚C
T stg
Storage temperature
-55 to 150
˚C
Min 25.4
All dimensions in mm
Note 1. Mounted on copper pad area 40mm square
Characteristics @25˚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
volts
µA
volts
amps
FB120
120
170
1.0
55
170
FB160
160
220
1.0
110
220
Ipp
Vfb
Ibo
Irm
Vbo
Vrm
Note 2. Using 10/1000µS pulse
304
V-I Characteristic
w w w. l i t t e l f u s e . c o m
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