FM12A, MIL-PRF-23419/12 QPL Series
Part Numbering System
FM12A
Fuse Type
Part Number/Rating
72V
Voltage
Cold Resistance
(Ohm) Note 1
Max.
voltage
(VDC)
Current
Rating
(Amp)
Min.
FM12A50V20A
50
20.0
0.0025
0.0050
FM12A72V1/8A
72
1/8
6.375
FM12A72V1/4A
72
1/4
1.875
FM12A72V3/8A
72
3/8
FM12A72V1/2A
72
FM12A72V3/4A
FM12A72V1A
Part Number
Max.
1A
Amp
Overload Interrupt Time
(Second) Nominal Rating - Note 2
Maximum I2T
2
(Ampere Second)
Nominal Rating - Note 3
Fig.*
(1, 2,
Or 3)
250%
400%
3
.01 - .300
.001 - .015
10.625
1
0 - 30.0
3.125
1
0 - 30.0
1.125
1.875
1
1/2
0.675
1.125
72
3/4
0.225
72
1.0
0.135
FM12A72V-1.5A
72
1.5
FM12A72V2.0A
72
FM12A72V3.0A
FM12A72V4.0A
600%
250%
400%
600%
.00015 - .003
750.000
96.000
43.200
0 - .015
0 - .003
2.930
0.004
0.002
0 - .015
0 - .003
11.719
0.015
0.007
.01 - .300
.001 - .015
.00015 - .003
0.264
0.034
0.015
1
.01 - .300
.001 - .015
.00015 - .003
0.469
0.060
0.027
0.375
1
.01 - .300
.001 - .015
.00015 - .003
1.055
0.135
0.061
0.225
1
.01 - .300
.001 - .015
.00015 - .003
1.875
0.240
0.108
0.097
0.163
1
.01 - .300
.001 - .015
.00015 - .003
4.219
0.540
0.243
2.0
0.045
0.075
1
.01 - .300
.001 - .015
.00015 - .003
7.500
0.960
0.432
72
3.0
0.0262
0.0438
1
.01 - .300
.001 - .015
.00015 - .003
16.875
2.160
0.972
72
4.0
0.0195
0.0325
1
.01 - .300
.001 - .015
.00015 - .003
30.000
3.840
1.728
FM12A72V5.0A
72
5.0
0.0135
0.0225
1
.01 - .300
.001 - .015
.00015 - .003
46.875
6.000
2.700
FM12A72V6.0A
72
6.0
0.0112
0.0188
1
.01 - .300
.001 - .015
.00015 - .003
67.500
8.640
3.888
FM12A72V7.5A
72
7.5
0.0082
0.0138
1
.01 - .300
.001 - .015
.00015 - .003
105.469
13.500
6.075
FM12A72V10A
72
10.0
0.0063
0.0107
2
.01 - .300
.001 - .015
.00015 - .003
187.500
24.000
10.800
FM12A72V15A
72
15.0
0.0038
0.0070
2
.01 - .300
.001 - .015
.00015 - .003
421.875
54.000
24.300
FM12A125V1/8A
125
1/8
6.375
10.625
1
0 - 30.0
0 - .015
0 - .003
2.930
0.004
0.002
FM12A125V1/4A
125
1/4
1.875
3.125
1
0 - 30.0
0 - .015
0 - .003
11.719
0.015
0.007
FM12A125V3/8A
125
3/8
1.125
1.875
1
.01 - .300
.0005 - .015
.00005 - .003
0.264
0.034
0.015
FM12A125V1/2A
125
1/2
0.675
1.125
2
.01 - .300
.0005 - .015
.00005 - .003
0.469
0.060
0.027
FM12A125V3/4A
125
3/4
0.225
0.375
2
.01 - .300
.0005 - .015
.00005 - .003
1.055
0.135
0.061
FM12A125V1A
125
1.0
0.090
0.270
2
.01 - .300
.0005 - .015
.00005 - .003
1.875
0.240
0.108
FM12A125V1.5A
125
1.5
0.085
0.225
2
.01 - .300
.0005 - .015
.00005 - .003
4.219
0.540
0.243
FM12A125V2.0A
125
2.0
0.045
0.135
2
.01 - .300
.0005 - .015
.00005 - .003
7.500
0.960
0.432
FM12A125V3.0A
125
3.0
0.035
0.105
2
.01 - .300
.0005 - .015
.00005 - .003
16.875
2.160
0.972
FM12A125V4.0A
125
4.0
0.030
0.090
2
.01 - .300
.0005 - .015
.00005 - .003
30.000
3.840
1.728
FM12A125V5.0A
125
5.0
0.022
0.068
2
.01 - .300
.0005 - .015
.00005 - .003
46.875
6.000
2.700
NOTES:
1. Cold resistance is measured at from 0.1 to 10 milliamperes of current.
2. Overload interrupt times at -55ºC and 250% overload current shall be as follows:
a) Fuses with ratings <3/8 amps shall open in 60 secs max. b) Fuses with ratings from 3/8 to 1.0 amp shall open in 10 secs max. c) Fuses with ratings > 1.0 amp shall open in 5 secs max.
3. Maximum I2T at -55ºC and 250% overload current may be greater than indicated. To calculate I2T at a case temperature of -55ºC and 250% overload current, multiply the I2 product by the
maximum blow times indicated in note 2 above.
*Please see MIL-PRF-23419/12A for figures detailing dimensions, construction and marking
