MIL-PRF-27/205D
TABLE I. Electrical ratings. 1/
DC 3/
DC
Quality
Temperature
Working
Test
Inductance 2/
H
current
Resistance
factor
stability
voltage
voltage
Dash
(1-2)
mA (max)
ohms ±20%
(min)
(-55șC to
(peak)
(1-2)
no.
±1%
(1-2)
(1-2)
at 1 V
+105șC)
V
01
0.007
250
0.6
115 at 5 kHz
±2.0%
350
1 V at 1 kHz
02
0.012
200
1.1
125 at 5 kHz
±2.0%
350
1 V at 1 kHz
03
0.020
150
1.6
125 at 5 kHz
±2.0%
350
1 V at 1 kHz
04
0.030
125
2.5
130 at 5 kHz
±2.0%
350
1 V at 1 kHz
05
0.050
100
3.9
135 at 5 kHz
±2.0%
350
1 V at 1 kHz
06
0.070
80
5.7
145 at 5 kHz
±2.0%
350
1 V at 1 kHz
07
0.120
60
9.1
145 at 5 kHz
±2.0%
350
1 V at 1 kHz
08
0.2
50
16
120 at 3 kHz
±2.0%
350
1 V at 1 kHz
09
0.3
40
25
118 at 3 kHz
±2.0%
350
1 V at 1 kHz
10
0.5
30
39
110 at 3 kHz
±2.0%
350
1 V at 1 kHz
11
0.7
25
58
105 at 3 kHz
±2.0%
350
1 V at 1 kHz
12
1.0
20
84
105 at 3 kHz
±2.0%
350
1 V at 1 kHz
13
1.5
17
130
95 at 3 kHz
±2.0%
350
1 V at 1 kHz
14
2.5
13
215
85 at 3 kHz
±2.0%
350
1 V at 1 kHz
15
4.0
10
335
50 at 1 kHz
±2.0%
350
1 V at 500 Hz
16
6.0
9
510
45 at 1 kHz
±2.0%
350
1 V at 500 Hz
17
10
7
840
45 at 1 kHz
±2.0%
350
1 V at 500 Hz
18
15 ±2%
5
1350
42 at 1 kHz
±2.0%
350
1 V at 500 Hz
19
22 ±2%
4
1960
40 at 1 kHz
±2.0%
350
1 V at 500 Hz
20
35 ±2%
3
3200
40 at 1 kHz
±2.0%
350
1 V at 500 Hz
1/ Qualification testing and approval to M27/205-20 shall be sufficient to grant qualification approval to
M27/205-01 through M27/205-19. For partial qualification, testing to one particular inductance value
shall be sufficient to grant qualification approval to any smaller inductance value than what was
qualified.
2/ The inductance is measured with 0 A dc applied to (1-2) and at the specified test voltage across
(1-2).
3/ The amount of dc current that will reduce the inductance a maximum of 8 percent.
REQUIREMENTS: (When numbers in parentheses, i.e., (1-2) are used, they indicate the winding and
the extreme terminals of the windings.)
Electrical ratings: See table I.
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle: Continuous.
Case: Metal enclosed.
Terminals: Solder terminal, United Transformer Co. Number ST-1708, or equivalent.
Terminal height: .266 ±.031 inch.
2
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