Thermal Fuse & MOV (TFMOV)

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.

Symbol

Parameter

Value

Units

TF

Fuse temperature

146

ºC

TO

Operating temperature

-40 to +85

ºC

TS

Storage Temperature Range

-40 to +100

ºC

TL

Hand soldered temperature / Time

265/3

ºc/s

Part

Number

Maximum

Continuous

Operating

Voltage

Varistor

Voltage

@1mA dc

Clamping

Voltage

(Max)

Maximum

Peak Current

(8/20μs)

Leakage current

Maximum

Energy

(Joule)

Typical

Capacitance

(Reference)

AC

r.m.s

DC

Min

Max

V C

I P

I max

IR@ (75% of V1mA

(DC))

10/1000

μ

s

@1kHz

( V )

( V )

( V )

(A )

( A )

(uA)

( J )

( pF )

14D511KT

320

410

459

561

845

50

4500

≤

10

136

450

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.