MIL-DTL-2212K(SH)
3.16.20 Terminals and terminal boards. Power current carrying studs, screws, and other current carrying
components of power connections shall be constructed of nonferrous materials. Control current carrying
components or connections shall be constructed of either nonferrous materials or silver-plated ferrous materials.
Where practical, terminal boards shall be in accordance with A-A-59125. Construction materials shall be durable
and corrosion-resistant.
3.16.21 Equipment capacitance and Electromagnetic Interference (EMI) filters. Where EMI filters are
required, line-to-line filters are preferred to line-to-ground filters (see 3.17.8). AC line-to-ground capacitance shall
be in accordance with MIL-STD-1399-300 and MIL-STD-461.
3.17 Performance.
3.17.1 Temperature rise (see 6.8.96). When tested as specified in 4.6.1, temperature rises shall not exceed the
values shown in table VIII. Coil rises shall be determined by the resistance method. All other rises shall be
measured by thermocouple or thermometer.
TABLE VIII. Maximum temperature rise.
Allowable temperature rise over
ambient (°F)
Part
122 °F ambient
149 °F ambient
Shunt coils:
Class A insulation
140
113
Class B insulation
185
158
Class F insulation
230
203
Class H insulation
275
248
Series coils: Single layer
Class A insulation
122
95
Class B insulation
158
131
Class F insulation
203
176
Class H insulation
248
221
Bare or enameled
149
122
Series coils: Multi layer
Class A insulation
104
77
Class B insulation
140
113
Class F insulation
185
158
Class H insulation
230
203
Contacts
158
131
Terminal studs and bolted
connections:
Silver-plated
149
122
Not silver-plated
122
95
25
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