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
T
F
T
O
T
S
T
L
Parameter
Value
146
-40 to +85
-55 to +150
265/3
Units
ºC
ºC
ºC
ºc/s
Fuse temperature
Operating temperature
Storage Temperature Range
Hand soldered temperature / Time
Part
Number
Maximum
Continuous
Operating
Voltage
AC
DC
r.m.s
(V)
Varistor
Voltage
@1mA dc
Min
(V)
Max
Clamping
Voltage
(Max)
V
C
(V)
I
P
(A )
Maximum
Peak Current
(8/20μs)
I max
(A)
Leakage current
I
R
@ (75% of V1mA
(DC))
(uA)
Maximum
Energy
(Joule)
10/1000
μs
(J)
Typical
Capacitance
(Reference)
@1kHz
( pF )
14D391KT
250
320
351
429
650
50
4500
10
100
800
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.
Thermal Fuse & MOV (TFMOV)
Physical parameters
T
max
Unit: mm
D
H2
T
L
l
(max.)
(max.)
(max.)
(min)
(min)
17.5
21.0
10.0
20.0
15.0
H
2
14D391KT
R
d
2
d1
W2
W1
e1
e2
Marking
VDR
14D391KT
W
1
W
2
e1
e2
d1
d2
(±1.0)
(±1.0)
(max)
(max)
(±0.1)
(±0.1)
7.5
3.0
3.2
4.8
0.8
0.5
Tinning copper wire
L
l
Lead wire
Comply with ROHS Directive
Coating
Blue insulated epoxy resin
Weight, g
6.2
■
Bulk
Tape&Reel
Ammopack
200pcs/bag
----pcs/reel
----pcs/bag
1000pcs/box
------pcs/box
--------------------
2000pcs/carton
------pcs/carton
------pcs/carton
Packing
□
□
Revision December 18, 2013
2/2
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
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