Littelfuse TMOV 25S Varistor Series Bedienungsanleitung PDF herunterladen (Seite 4)

218

Revised: May 8, 2013

Varistor Products

TMOV

25S Varistor Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/tmov.html for current information.

Radial Lead Varistors > TMOV

25S Series

Pulse Rating Curve

Wave Solder Proﬁle

Because the TMOV

25S Series contains a thermally

responsive device, care must be taken when soldering

the device into place. Two soldering methods are possible.

Firstly, hand soldering: We recommend the use of pliers

to heat-sink the leads of the device. Secondly, wave-

soldering: This is a strenuous process requiring pre-heat

stages to reduce the stresses on devices.

It is critically important that all preheat stage and the

solder bath temperatures are rigidly controlled. The

recommended solder for the TMOV

Series is a 62/36/2

(Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also

recommends an RMA solder ﬂux. SAC solders (SnAgCu)

are recommended for Lead-free applications.

Soldering Proﬁle

100

150

200

250

300

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

TIME (MINUTES)

MAXIMUM WAVE 260ºC

PREHEAT

TEMPERATURE (ºC)

∞

100

1000

10000

100000

10 100 1000 10000

Impulse Duration (μsecs)

Surge Current (A)

Number of Pulses

Figure 4

Figure 5

1 2 3 4 5 6 7

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