Introduction to Circuit Protection

Introduction to Circuit Protection

Transientology

148

© 2009 Littelfuse, Inc.

Specifications are subject to change without notice.

Radial Lead Fuses

373 Series

Please refer to www.littelfuse.com/series/373.html for current information.

Average Time Current Curves

Temperature Rerating Curve

CURRENT IN AMPERES

0.001

0.010

0.100

1

10

100

1000

10000

100000

0.100

1

10

100

0.02

Soldering Parameters - Wave Soldering

Dwell Time

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

Time (Seconds)

Cooling Time

Preheat Time

Wave Parameter

Lead-Free Recommendation

Preheat:

100

150

Solder PotTemperature:

260

°

Solder DwellTime:

Recommended Hand-Solder Parameters:

Note: These devices are not recommended for IR or

Convection Reflow process.

Recommended Process Parameters:

0

20

40

60

80

100

120

140

-40

-20

0

2040

6080

AMBIENT TEMPERATURE (°C)

23°C