 M Series
(M300S/M300T)
300 Watt Single & Triple Output Power Supply
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Features
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300 watt single & triple output switching
power supply.
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High efficiency, 60% minimum.
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Meets MIL-STD-461B, MIL-STD-810C and MIL-S-901C.
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 Click here
for datasheet (PDF)
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Specifications
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Input:
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103.5-126.5 Vac, 47-440 Hz, single
phase. Other inputs available (H and -3 options.)
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Efficiency:
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60% minimum at full load.
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Line Regulation:
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25 mV or within 0.2%, whichever
is greater, for change from low line to high line with load constant.
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Load Regulation:
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25 mV or 0.2%, whichever is greater
for change from no load to full load with line constant.
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Auxiliary Output Tracking:
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The negative output will track the
positive output within 200 mV for all rated conditions (M300T).
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Pard (Noise and Ripple):
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Main and Auxiliary outputs: 30 mV
rms, 100 mV P-P maximum at 25 MHz bandwidth, over entire temperature
range.
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Isolation Voltage:
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500 Vdc, input to output; 500 Vdc,
input to case; 100 Vdc, output to case.
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Insulation Resistance:
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50 Mohms between input and output,
input and case, output and case, when measured at 50 Vdc.
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Temperature Range:
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Operating: 0°C to +71°C maximum,
at center of the baseplate. Storage: -55°C to +85°C, ambient.
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Temperature Coefficient:
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0.01% / °C for main and auxiliary
outputs over entire temp range.
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Input Transient Protection:
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Unit will withstand 143.8 Vac for
0.3 second, in accordance with MIL-STD-1399.
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Load Transient Recovery:
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Output voltage returns to regulation
limits within 1.5 milliseconds for main and 100 microseccond for
auxiliary outputs after 50% change in load current.
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Holdup time:
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10ms after nominal input is lost at full load.
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Short Circuit Protection:
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Completely protected against a short
circuit of any duration. Output automatically restores to normal
when overload is removed.
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Current Limiting:
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Output current is limited to 120%
on main and auxiliary outputs (±10%) under overload conditions.
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Remote Sensing:
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Regulator monitors voltage directly
at the load using extra "sensing" leads and compensates
for a dc voltage drop up to .5 volt in the load leads.
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EMI:
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Units were designed and tested to
the requirement of MIL-STD-461B, Class A1B, for generation of and
susceptibility to radiated and conducted interference. For further
details and reports, consult your nearest sales office.
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Reliability:
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MTBF is calculated per MIL-HDBK-217D
at 50°C baseplate temperature with maximum operating input voltage
and maximum rated output power. The MTBF for M300T at ground benign
environment is 77,455 hours.
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Environment:
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Encapsulated and hermetically sealed
to meet the environmental requirements of MIL-STD-810C and MIL-S-901C,
Class 2, including altitude (to 70,000 feet), vibration, shock,
acceleration, sand, dust, humidity, saltspray, fungus, explosion,
etc.
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Connectors:
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Standard unit is provided with an
input solder pin header and an output "hermetic seal" stud-type
connector.
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Single
Output
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Output Voltage Range
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Output Current (Amps)
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Weight
(Lbs.)
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Size (inches)
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A
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B
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C
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M300S/5-D
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4.75-5.25
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60.0
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7.8
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6 x 8 x 3
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M300S/12-D
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11.40-12.60
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25.0
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7.8
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6 x
8 x 3
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M300S/15-D
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14.25-15.75
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20.0
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7.8
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6 x
8 x 3
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M300S/24-D
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22.80-25.20
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12.5
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7.8
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6 x
8 x 3
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M300S/28-D
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26.60-29.40
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10.7
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7.8
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6 x
8 x 3
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Triple
Output
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Output Voltage (main/aux)
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Output Current (m/aux)
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Weight (Lbs.)
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Size (inches)
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A
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B
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C
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M300T/5/12-D
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5 / ±12
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48/2.5
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9.2
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6 x 8 x 3
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M300T/5/15-D
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5 / ±15
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48/2.0
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9.2
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6 x
8 x 3
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Model
Numbering System
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Model Series
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Total Output Power
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# of Outputs
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Main Output Voltage
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Aux. Output Voltage
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Header Type
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Options
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M
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300
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T
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/
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5
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/
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12
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-
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D
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-
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R
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Options
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A Option:
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Special Connectors. A military-type
hermetically sealed connector is provided in place of our standard
input header. To order, replace the "D" in the model
with "A".
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E Option:
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Severe Shock, Acceleration and Vibration.
Enables all units to withstand 60 g's shock, 50 g's acceleration
and 30g's vibration. To order, add "E" after "D" in
the model number.
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H Option:
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Wide Input Voltage. Units will operate
from 90 to 126.5 Vac with 20% derating in output power. To order,
add an "H" after the "D" in the model number.
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L Option:
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Remote Turn On/Off. Provides isolated
terminals to turn output on/off with TTL logic signal. To order,
add "L" after "D" in the model number.
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R Option:
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Remote Output Adjustment. An adjustment
potentiometer can be remotely located to adjust the output voltage.
To order, add "R" after "D" in the model number.
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T Option:
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Wider Operating Temperature. -20°C
to +71°C. Pard (noise and ripple) specification increases to 200
mV P-P. To order, add "T" after "D" in the
model number.
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-ER Option:
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Provides increased reliability by
using higher levels of military grade components. To order, add "-ER" after
the model number.
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-3 Option:
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WYE Input. Changes input to 3-phase,
4-wire "WYE". To order, add "-3" to the end
of the model number.
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-7 Option:
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50/50 Power Split. Provides a 50/50
power split between main and auxiliary outputs (50% main output,
25% each,, auxiliary outputs). Load regulation of auxiliary outputs
will be 2 times greater than standard model. To order, add "-7" to
the end of the model number.
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