Radial Lead Fuses
MICRO™ > Very Fast-Acting > 262/268/269 Series
262/268/269 Series,
MICRO™ Very Fast-Acting Fuse (High-Reliability)
QPL
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
radial leaded
ampere of 2mA to 5A
Applications
Agency Approvals
Agency
Agency File Number
Ampere Range
E10480
LR 29862
2mA - 5A
2mA - 5A
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.
Electrical Characteristics
% of Ampere
Rating
100%
200%
Ampere Rating
1/500–15
1/500–3/10
4/10-5
Opening Time
4 Hours,
Min.
5 Seconds,
Max.
2 Seconds,
Max.
QPL
FM07A
Electrical Characteristics
Ampere
Rating
(A)
.002
.005
.010
.015
.031
.050
.062
.100
.125
.200
.250
.300
.400
.500
.600
.700
.750
.800
1.00
01.5
2.00
3.00
4.00
5.00
Max
Voltage
Rating
(V)
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
2000
280
94.0
44.0
16.45
3.20
2.25
1.17
1.0
2.30
1.75
1.25
0.227
0.167
0.140
0.114
0.104
0.094
0.100
0.063
0.046
0.034
0.019
0.018
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Agency Approvals
Amp Code
.002
.005
.010
.015
.031
.050
.062
.100
.125
.200
.250
.300
.400
.500
.600
.700
.750
.800
001.
01.5
002.
003.
004.
005.
QPL
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
10,000 amperes at
125 VAC/VDC
Please contact Littelfuse for Average Time Current Curve.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/262.html,
/268.html or /269.html for current information.
262/268/269 Series
127
Revised: January 7, 2009
262/268/269
Radial Lead Fuses
Introduction to Circuit Protection
Transientology
MICRO™ > Very Fast-Acting > 262/268/269 Series
Soldering Parameters - Wave Soldering
300
Recommended Process Parameters:
Wave Parameter
Preheat:
(Depends on Flux Activation Temperature)
(Typical Industry Recommendation)
Temperature
(°C) - Measured on bottom side of board
280
260
240
220
200
180
160
140
120
100
80
60
40
20
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
10
20
30
40
50
60
70
80
90
0
0
Lead-Free Recommendation
Temperature Minimum:
Temperature Maximum:
Preheat Time:
Solder Pot Temperature:
Solder Dwell Time:
100
°
C
150
°
C
60-180 seconds
260
°
C Maximum
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.
Time
(Seconds)
Preheat
Time
Dwell
Time
Cooling
Time
Temperature Rerating Curve
Please contact Littelfuse for average time current curve.
262/268/269 Series
128
Revised: January 7, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/262.html,
/268.html or /269.html for current information.
Radial Lead Fuses
MICRO™ > Very Fast-Acting > 262/268/269 Series
Product Characteristics
Materials
Weight
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
Per MIL
-STD-105, Inspection Level II
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
Salt Spray
Seal Test
Insulation Resistance
(After Opening)
Thermal Shock
Moisture Resistance
Fuses to MIL SPEC
Vibration
Operating Temperature
–55ºC to +125ºC
(1/500): MIL
-STD-202, Method 213,
Test Condition A (50 G’s peak for
11 milliseconds). (1/200–5): MIL
-
STD-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)
MIL
-STD-202, Method 106
262 Series is available in FM07A on
QPL for MIL
-PRF-23419/7 To order,
.
change 262 to 269
Shock
Lead Pull Force
AQL (Electrical
Characteristics)
Sampling
Traceability and
Identification Records
Options
Product Marking
Dimensions
Part Numbering System
262
000
Series
7.37 4.32
(.29") (.17")
5.97
(.235")
268
000
Series
7.37
(.29")
25.4
(1.0")
2.54
(.10")
0262 xxxx V
Series
Amp. Code
Refer to Amp Code column of
Electrical Characteristics Table
2.54 (.10")
Packaging Code
V=5
Packaging
Packaging Option
Bulk
Packaging Specification
N/A
Quantity
5
Quantity &
Packaging Code
V
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/262.html,
/268.html or /269.html for current information.
129
Revised: January 7, 2009
262/268/269 Series
262/268/269
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