Littelfuse 473 User Manual

Axial Lead & Cartridge Fuses

PICO® ll > Slo-Blo® > 473 Series

473 Series, PICO® II, Slo-Blo® Fuse

Description

The PICO

®

II Slo-Blo® Fuse combines time-delay

performance characteristics with the proven reliability of

®

a PICO

Fuse.

Features

PS

E

Agency Approvals

Agency Agency File Number Ampere Range

E10480 375mA - 7A

LR 29862 375mA - 7A

PS

E

JET 1896-31007-1001 1A - 5A

Additional Information

Datasheet

Resources

Samples

Electrical Characteristics

•Enhancedinrush

withstand

• Smallsize

• Widerangeofcurrent

ratings (375mA - 7A)

• RoHScompliant

• Wideoperating

temperature range

• Lowtemperature
de-rating)

Applications

•Flat–panelDisplayTV

•LCDmonitor

•Medicalequipment

•Industrialequipment

•Lightingsystem

Electrical Characteristics

% of Ampere

Rating

100% 4 Hours, Min.

200% 1 Sec., Min.; 60 Sec., Max.

300% 0.2 Sec., Min.; 3 Sec., Max.

800% 0.02 Sec., Min.; 0.1 Sec., Max.

Opening Time

Ampere

Rating

(A)

0.375 .375 125

0.500 .500 125 1.1300 0.210 0.775 X X

0.750 .750

1.00 001.

1.50 01.5 125 0.1160 3.940 0.208 X X X

2.00 002. 125 0.0712 7.600 0.180 X X X

2.25 2.25 125 0.0630 9.280 0.164 X X X

2.50 02.5 125 0.0520 13.00 0.153 X X X

3.00 003.

3.50 03.5 125 0.0240 26.80 0.094 X X X

4.00 004. 125 0.0194 35.00 0.086 X X X

5.00 005. 125 0.0133 54.80 0.074 X X X

7.00 0 0 7. 125 0.0092 105.00 0.070 X X

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13

Amp

Code

Max

Voltage

Rating

(V)

125
125

125

Interrupting

Rating

50 amperes at 125 VDC/

VAC

Nominal Cold

Resistance

(Ohms)

1.7400 0.085 0.840 X X

0.4600 0.760 0.429 X X

0.3000 2.010 0.353 X X X

0.0380 21.00 0.140 X X X

Nominal

Melting

2

t (A2 sec)

I

Nom

Voltage Drop

(mV)

Agency Approvals

PS

E

Axial Lead & Cartridge Fuses

.375A

TIME IN SECONDS

CURRENT IN AMPERES

PICO® ll > Slo-Blo® > 473 Series

Temperature Rerating Curve

Note:

1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.

Soldering Parameters

Recommended Process Parameters:

Average Time Current Curves

.50A

.75A

1.0A

1.5A

2.0A

2.5A

3.0A

1000

100

10

1

0.1

0.01

3.5A

4.0A

5.0A

7.0A

10001001010.1

Preheat:

(Depends on Flux Activation Temperature)

Temperature Minimum:
Temperature Maximum:
Preheat Time: 60-180 seconds

Solder Pot Temperature:
Solder Dwell Time: 2-5 seconds

Recommended Hand-Solder Parameters:

Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.

Note: These devices are not recommended for IR or
Convection Reflow process.

Wave Parameter Lead-Free Recommendation

(Typical Industry Recommendation)

100

° C

150

° C

260

° C Maximum

Specifications are subject to change without notice.

© 2013 Littelfuse, Inc.

Revised: 12/19/13