20D471KT Datasheet, PDF (1/2 Pages) UN Semiconducctor INC – Thermal Fuse & MOV (TFMOV)

Thermal Fuse & MOV (TFMOV)
UN Thermal Fuse & MOV (TFMOV) is a new patented product
in the field of surge protection. TFMOV is a fail-safe
device,which integrated a disk varistor and a Thermal Fuse in
a single package. The Thermal Fuse is designed to
disconnect the MOV from the circuit, in case of MOV's failure.
Because the MOV might thermally run away due to the
increasing leakage current, or burn and burst in the event of a
short-circuit fault.
Symbol
TF
TO
TS
Fuse temperature
Parameter
Operating temperature
Storage Temperature Range
TL
Hand soldered temperature / Time
Value
146
-40 to +85
-40 to +100
265/3
Units
ºC
ºC
ºC
ºc/s
Part
Number
20D471KT
Maximum
Continuous
Operating
Voltage
AC
r.m.s
DC
(V)
Varistor
Voltage
@1mA dc
Min
Max
(V)
300
385 425 517
Clamping
Voltage
(Max)
VC
IP
(V)
(A )
775
100
Maximum
Peak Current
(8/20μs)
I max
(A)
Leakage current
IR@ (75% of V1mA
(DC))
(uA)
10000
≤10
Maximum
Energy
(Joule)
10/1000
μs
(J)
173
Typical
Capacitance
(Reference)
@1kHz
( pF )
1200
Revision December 18, 2013
1/2
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.