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
•Militarygradeavailable
• Availablefromverylow
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
• Availableinplug-inand
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
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
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
Product Characteristics
Radial Lead Fuses
MICRO™ > Very Fast-Acting > 262/268/269 Series
Materials
Weight
Lead Pull Force
AqL (Electrical
Characteristics)
Sampling Per MIL-STD-105, Inspection Level II
Traceability and
Identification Records
Options
Product Marking
Gold-Plated Copper Leads, Type II
(Fuse cap is also Gold-Plated)
262 and 269 Series .36 Grams;
268 Series .48 Grams
MIL-STD-202, Method 211, Test
Condition A (will withstand a 5 lb.
axial pull test)
Certified to 1% AQL
Controlled by lot number and
retained on file for a minimum
of three years. Copies of Lot
Certification Test data available when
requested with order
Special screening tests, burn-in, etc.
can be supplied on special order to
meet specific requirements
262 / 268 Series: Brand logo, current
and voltage ratings
269 Series: Brand logo, current and
voltage ratings and agency approval
mark
Dimensions
Operating Temperature –55ºC to +125ºC
(1/500): MIL-STD-202, Method 213,
Shock
Vibration
Salt Spray
Seal Test
Insulation Resistance
(After Opening)
Thermal Shock
Moisture Resistance MIL-STD-202, Method 106
Fuses to MIL SPEC
Test Condition A (50 G’s peak for
11 milliseconds). (1/200–5): MILSTD-202, Method 213, Test Condition
I (100 G’s peak for 6 milliseconds)
MIL-STD-202, Method 201 (10–55
Hz); MIL-STD-202, Method 204, Test
Condition C (55–2000 Hz at 10 G’s
Peak)
MIL-STD-202, Method 101, Test
Condition B
MIL-STD-202, Method 112, Test
Condition A
MIL-STD-202, Method 302, Test
Condition A (1/2 Megohm minimum)
MIL-STD-202, Method 107, Test
Condition B (–65ºC to 125ºC)
262 Series is available in FM07A on
QPL for MIL-PRF-23419/7. To order,
change 262 to 269
Part Numbering System
262 000 Series 268 000 Series
7.37
(.29")
4.32
(.17")
2.54 (.10")
5.97
(.235")
7.37
(.29")
25.4
(1.0")
2.54
(.10")
Packaging
Packaging Option Packaging Specification Quantity
Bulk N / A 5 V
0262 xxxx V
Series
Amp. Code
Refer to Amp Code column of
Electrical Characteristics Table
Packaging Code
V = 5
Quantity &
Packaging Code
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 12/19/13
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