MIL-PRF-27/235E
REQUIREMENTS: (When numbers in parentheses, i.e., (1-2) are used, they indicate the winding and
terminals of the windings.)
Electrical ratings:
Primary (1-2): 115 volts rms, 50/60 hertz, see table I.
Secondary (5-6): 115 volts rms, see table I.
Working voltage (peak): See table I.
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle: Continuous.
Case: Metal encased.
Material: Brass.
Mounting cover: Cold rolled steel.
Terminals: Brass, solder, lug, insulated, United Transformer Company P/N ST-1506, or equivalent.
Height: See table I.
Weight: See table I.
Operating temperature range: -55°C to +105°C.
Dielectric withstanding voltage (at sea level): 500 volts rms.
Electrical characteristics:
No load: With 115 volts rms, 60 hertz across (1-2), current in (1-2) shall not exceed "X"
milliamperes and the power in (1-2) shall not exceed "Y" watts.
Voltage across (5-6): 115 volts rms ±3 percent. See table I for "X" and "Y" values.
Rated load: With 115 volts, 60 hertz across (1-2), the voltage across (5-6) shall be
115 volts ±3 percent.
Polarity: Additive with terminals 2 and 6 connected.
Electrostatic shielding: Voltage ratio > 100:1 at 20 kilohertz.
DC resistance: See table I.
Temperature rise: 40°C with 115 volts rms, 60 hertz across (1-2) at an ambient temperature of
65°C.
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