45
AXIALLEADANDCARTRIDGEFUSES
SUBMINIATURE
MICRO
FUSE
Very Fast-Acting Type
Developed originally for the U.S. Space Program, MICRO
fuse provides reliability in an extra compact design.The
MICRO fuse is available in plug in or radial lead styles and
a complete range of ampere ratings from 1/500 to 5
amperes to suit a wide variety of design needs.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Ampere
Rating
Rating
100%
1/500
–
5
1/500
–
3/10
4/10
–
5
Opening
Time
4 hours,
Min
imum
5 seconds,
Max
imum
2 seconds,
Max
imum
200%
AGENCY APPROVALS:
Recognized under the
Components Program of Underwriters Laboratories and
Certified by CSA.
AGENCY FILE NUMBERS:
UL E10480, CSA LR 29862.
INTERRUPTING RATING:
10,000 amperes at 125 VAC/VDC.
FUSES TO MIL SPEC: 273 Series
is available in Military
QPL type (FM02).To order, change
273
to
274
.
Operating Temperature:
273
and
279:
–
55
°
C to 85
°
C.
272
and
278:
–
55
°
C to 125
°
C
PATENTED
ORDERING INFORMATION:
Plug-In
Radial Lead
Catalog
Catalog
Catalog
Catalog Ampere Voltage Resistance
Number
Number
Number
Number Rating Rating Cold Ohms
272
.002
273
.002
278
.002
279
.002
272
.005
273
.005
278
.005
279
.005
272
.010
273
.010
278
.010
279
.010
272
.015
273
.015
278
.015
279
.015
272
.031
273
.031
278
.031
279
.031
272
.050
273
.050
278
.050
279
.050
272
.062
273
.062
278
.062
279
.062
272
.100
273
.100
278
.100
279
.100
272
.125
273
.125
278
.125
279
.125
272
.200
273
.200
278
.200
279
.200
272
.250
273
.250
278
.250
279
.250
272
.300
273
.300
278
.300
279
.300
272
.400
273
.400
278
.400
279
.400
272
.500
273
.500
278
.500
279
.500
272
.600
273
.600
278
.600
279
.600
272
.700
273
.700
278
.700
279
.700
272
.750
273
.750
278
.750
279
.750
272
.800
273
.800
278
.800
279
.800
272
001
273
001
278
001
279
001
272
01.5
273
01.5
278
01.5
279
01.5
272
002
273
002
278
002
279
002
272
003
273
003
278
003
279
003
272
004
273
004
278
004
279
004
272
005
273
005
278
005
279
005
Nominal
Nominal
Melting I
2
t
A
2
Sec.
0.00000000845
0.0000000810
0.000000462
0.00000123
0.00000810
0.0000666
0.000115
0.000385
0.000691
0.00409
0.00640
0.00945
0.0251
0.0716
0.0411
0.0710
0.0900
0.113
1/500
1/200
1/100
1/64
1/32
1/20
1/16
1/10
1/8
2/10
1/4
3/10
4/10
1/2
6/10
7/10
3/4
8/10
1
1
1
/
2
2
3
4
5
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
2200
280
80.0
44.0
16.0
3.20
2.32
1.25
1.0
2.30
1.75
1.25
0.227
0.167
0.430
0.324
0.293
0.271
0.0880 0.0648
0.0578 0.160
0.0425 0.300
0.0275 0.759
0.0202 1.38
0.0156 2.21
100
10
1
0.1
0.01
0.001
1
10
100
0.01
0.1
0.005
1
1
1
1
1
1
1
1
3
1
1
2
3
4
5
T
CURRENT IN AMPERES
Average Time Current Curves
QPL
.29"
.17"
.35"
.17"
.10"
.29"
1.0"
.10"
1.0"
.10"
.235"
.25"
.235"
.10"
.35"
.25"
272
000
Series
273
000
Series
278
000
Series
279
000
Series
NOTE: Amperage and voltage rating stamped on cap. Leads are solder-coated
copper; .025" diameter.