Littelfuse 269 User Manual

Radial Lead Fuses

QPL

QPL

QPL

MICRO™ > Very Fast-Acting > 262/268/269 Series

262/268/269 Series, MICRO™ Very Fast-Acting Fuse (High-Reliability)

Description

The 262/268/269 Series are high–reliability micro
fuses, with a 125V rating, very fast-acting type with
high breaking capacity. This series is listed under the
Department of Defense Quality Product List.

Features

•Militarygradeavailable

• Availablefromverylow

ampere of 2mA to 5A

Applications

Agency Approvals

Agency Agency File Number Ampere Range

E10480 2mA - 5A

Protection of electrical, electronic, and communication
equipment having printed circuit boards (PCBs) usable
in direct current (DC) and alternating current (AC) (up
to 400 hertz (Hz)) circuits capable of withstanding and
functioning in extreme conditions found in Spacecraft or
Military applications as described in MIL-PRF-23419.

LR 29862 2mA - 5A

FM07A 2mA - 5A

Electrical Characteristics

% of Ampere

Rating

100% 1/500–15 4 Hours, Min.

200%

Electrical Characteristics

Ampere

Rating

(A)

.002 .002 125
.005 .005 125 280

.010 .010 125 94.0
.015 .015 125 44.0
.031 .031 125 16.45
.050 .050 125 3.20
.062 .062 125 2.25
.10 0 .100 125 1. 17
.125 .125 125 1. 0
.200 .200 125 2.30
.250 .250 125 1.75
.300 .300 125 1.25
.400 .400 125 0.227
.500 .500 125 0.167
.600 .600 125 0.140
.700 .700 125 0.114
.750 .750 125 0.104
.800 .800 125 0.094

1. 0 0 001. 125 0.100

01. 5 01. 5 125 0.063

2.00 002. 125 0.046

3.00 003. 125 0.034

4.00 004. 125 0.019

5.00 005. 125 0.018

Please contact Littelfuse for Average Time Current Curve.

Amp Code

Max

Voltage

Rating

(V)

Interrupting

Rating

10,000 amperes at

125 VAC/VDC

Nominal Cold

Resistance

(Ohms)

2000

• Availableinplug-inand

radial leaded

Ampere Rating Opening Time

1/500–3/10 5 Seconds, Max.

4/10-5 2 Seconds, Max.

Agency Approvals

X X X
X X X
X X X
X X X
X X X
X X X
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X X X
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X X X
X X X
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Specifications are subject to change without notice.

© 2013 Littelfuse, Inc.

Revised: 12/19/13

Radial Lead Fuses

300

240

Temperature (°C) - Measured on bottom side of board

MICRO™ > Very Fast-Acting > 262/268/269 Series

Soldering Parameters - Wave Soldering

280

260

240

220

200

180

160

140

120

100

80

60

40

20

0

0

102030405060708090

Time (Seconds)

Preheat Time

100

Temperature Rerating Curve

110

120

130

Dwell Time

Recommended Process Parameters:

Wave Parameter Lead-Free Recommendation

Preheat:

(Depends on Flux Activation Temperature)

Temperature Minimum:
Temperature Maximum:

(Typical Industry Recommendation)

100

° C

150

° C

Preheat Time: 60-180 seconds

Solder Pot Temperature:

260

° C Maximum

Solder Dwell Time: 2-5 seconds

140

150

160

170

180

190

200

210

220

Recommended Hand-Solder Parameters:

230

Solder Iron Temperature: 350° C +/- 5°C

Cooling Time

Heating Time: 5 seconds max.

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

Additional Information

Datasheet

262 Series

Resources

262 Series

Samples

262 Series

Please contact Littelfuse for average time current curve.

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

Datasheet

268 Series

Datasheet

269 Series

Resources

268 Series

Resources

269 Series

Samples

268 Series

Samples

269 Series