Datasheet - Littelfuse

Radial Lead Fuses
MICRO™ > Very Fast-Acting Fuse > 262/268/269 Series
QPL
262/268/269 Series, MICRO™ Very Fast-Acting Fuse (High-Reliability)
Description
The 262/268/269 Series are high–reliability MICROTM
fuses, with a 125V rating, very fast-acting type with
high breaking capacity. The 269 series is listed under the
Department of Defense Quality Product List.
Features
• Military grade available
• Available in plug-in and
radial leaded
• Available from very low
ampere of 0.002A to 5A
Applications
Agency Approvals
Agency
QPL
Agency File
Ampere Range
Series
E10480
0.002A - 5A
262 & 268
29862
0.002A - 5A
262 & 268
FM07A
0.002A - 5A
269
Number
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
Ampere Rating
Opening Time
100%
0.002 – 15
4 Hours, Min.
0.002 – 0.3
5 Seconds, Max.
0.4 - 5
2 Seconds, Max.
200%
Electrical Characteristics
Ampere
Rating
(A)
Amp Code
.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
.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.
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)
10,[email protected]/VDC
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
Please contact Littelfuse for Average Time Current Curve.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice. Application testing is strongly recommended.
Revised: 08/10/15
Agency Approvals
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
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Radial Lead Fuses
MICRO™ > Very Fast-Acting Fuse > 262/268/269 Series
Soldering Parameters - Wave Soldering
Recommended Process Parameters:
280
260
Wave Parameter
240
220
Preheat:
200
(Depends on Flux Activation Temperature)
180
160
140
120
100
80
60
40
Lead-Free Recommendation
(Typical Industry Recommendation)
Temperature Minimum:
100° C
Temperature Maximum:
Preheat Time:
150° C
60-180 seconds
Solder Pot Temperature:
260° C Maximum
Solder Dwell Time:
2-5 seconds
Time (Seconds)
Cooling Time
Preheat Time
Dwell Time
240
230
220
210
200
190
180
170
160
150
140
130
120
110
90
100
80
70
60
50
40
30
0
0
20
20
10
Temperature (°C) - Measured on bottom side of board
300
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.
Temperature Re-rating Curve
Notes:
1. Rerating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
2. Please contact Littelfuse for average time current curve.
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/10/15
Radial Lead Fuses
MICRO™ > Very Fast-Acting Fuse > 262/268/269 Series
Product Characteristics
Materials
Gold-Plated Copper Leads, Type II
(Fuse cap is also Gold-Plated)
Weight
262 and 269 Series .36 Grams;
268 Series .48 Grams
Lead Pull Force
MIL-STD-202, Method 211, Test
Condition A (will withstand a 5 lb.
axial pull test)
AQL (Electrical
Characteristics)
Certified to 1% AQL
Sampling
Per MIL-STD-105, Inspection Level II
Traceability and
Identification Records
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
Options
Special screening tests, burn-in, etc.
can be supplied on special order to
meet specific requirements
Product Marking
262 / 268 Series: Brand logo, current
and voltage ratings
269 Series: Brand logo, current and
voltage ratings and agency approval
mark
Dimensions
–55ºC to +125ºC
Shock
(1/500): MIL-STD-202, Method 213,
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)
Vibration
MIL-STD-202, Method 201 (10–55
Hz); MIL-STD-202, Method 204, Test
Condition C (55–2000 Hz at 10 G’s
Peak)
Salt Spray
MIL-STD-202, Method 101, Test
Condition B
Seal Test
MIL-STD-202, Method 112, Test
Condition A
Insulation Resistance
(After Opening)
MIL-STD-202, Method 302, Test
Condition A (1/2 Megohm minimum)
Thermal Shock
MIL-STD-202, Method 107, Test
Condition B (–65ºC to 125ºC)
Moisture Resistance
MIL-STD-202, Method 106
Fuses to MIL SPEC
262 Series is available as FM07A on
QPL for MIL-PRF-23419/7. To order,
change 262 to 269
Part Numbering System
262 000 Series
7.37 4.32
(.29") (.17")
Operating Temperature
0262 xxxx V
268 000 Series
5.97
(.235")
7.37
(.29")
Series
25.4
(1.0")
2.54
(.10")
2.54 (.10")
Amp. Code
Refer to Amp Code column of
Electrical Characteristics Table
Packaging Code
V=5
Packaging
Additional Information
Packaging
Option
Packaging
Specification
Quantity
Quantity &
Packaging Code
Bulk
N/A
5
V
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 08/10/15
Datasheet
262 Series
Resources
262 Series
Samples
262 Series
Datasheet
268 Series
Resources
268 Series
Samples
268 Series
Datasheet
269 Series
Resources
269 Series
Samples
269 Series