MIL-PRF-27/312C
Marking location: See figure 1.
Part or Identification Number (PIN): M27/312-(dash number from table I).
TABLE I. Electrical ratings.
Secondary (3-5)
Dash
DC resistance
Voltage
Current 1/
number
(ohms)
(volts)
(amperes)
±25 percent
±3 percent
01
5.0
1.00
0.335
02
6.3
0.79
0.530
03
8.0
0.67
0.870
04
10.0
0.50
1.34
05
12.6
0.39
2.06
06
14.0
0.36
2.95
07
16.0
0.34
3.35
08
18.0
0.28
4.65
09
20.0
0.25
5.25
10
22.0
0.22
7.30
11
25.0
0.20
8.23
12
28.0
0.18
11.4
13
31.0
0.16
13.8
14
35.0
0.14
17.6
15
39.0
0.13
19.7
16
43.0
0.12
22.0
17
48.0
0.10
30.0
18
55.0
0.09
34.4
19
63.0
0.08
52.0
20
70.0
0.071
68.0
21
80.0
0.067
80.0
22
90.0
0.055
112
23
100
0.050
113
24
110
0.045
140
25
123
0.040
198
26
138
0.036
227
1/ For 50 Hz operation, reduce secondary current by 10 percent.
VERIFICATION:
Extent of Qualification:
Qualification testing and approval to M27/312-26 or M27/316-30 or M27/322-24 shall be
sufficient to grant qualification approval to MIL-PRF-27/312 through MIL-PRF-27/322,
inclusive, all parts.
Qualification testing and approval to M27/312-26 shall be sufficient to grant qualification
approval M27/312-01 through M27/312-26.
3
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