RTPS48-XX-02UL Series COTS Power Supply

48W mil-std-461 F cots power supplies mil std 461
  • Three 48W Models:
    • 12V @ 4A
    • 24V @ 2A
    • 28V @ 1.71A
  • 48W
  • Meets FCC Part 15 Class B, CISPR22.2 Class A, MIL-STD-461-F Compliant
  • Rugged metal enclosure with potting offers improved shock and vibration performance and
    resistance to environmental factors
  • Universal input 100~240V +/- 10%
  • Convection-cooled
  • Compact size
  • UL Listed 60950-1

DB9 Connector (DB15 shown in photos)

Waterproof/Dustproof to IP52

Input Characteristics  
Voltage and Frequency 90 ~ 264Vac, 47 ~ 63Hz
AC Current 1A Max. at any Input voltage range at Max. load condition
Inrush Current (Typ.)  less than 40A at 120V ~ 240V input (Optional low inrush model: less than 15A at 110V input and less than 30A at 220V input
Leakage Current <0.75mA/240Vac @60Hz
Output Characteristics Part #: RTPS 48-12-02 UL Part #: RTPS 48-24-02 UL Part #:RTPS 48-28-02 UL
Output Voltage 12V 24V 28V
Current (A) Minimum 0A 0A 0A
Current (A) Maximum  4A  2A  1.71A
Voltage Initial Setting +/- 1% +/- 1% +/- 1%
Combined Load/line Regulation Output maximum full rated o/p, CURRENT regulation +/-5%
Ripple and Noise The ripple and noise is as follows when measured with a maximum bandwidth of 20MHz and 4.7uF/50V capacitor connected at output wire shall be less that 1% P-P
Efficiency 81% minimum at 120~240Vac at maximum load
Hold Up Time 8mS minimum
Protection Specifications
Over Current Output limited less than 120% max rated output current
Short Circuit Output shall shut down and automatic restart
Over Voltage Power supply shall not exceed 115% ~130% of rated output voltage
Over Temperature Power supply shall reduce the output voltage and current at the out of spec high temperature condition and maintain the hot spot temperature below components rating
Environment Specifications
Operating Temperature Nominal -40 to +60°C ambient at full load Linearly de-rate output power to 70% up to 80°C
Operating Humidity 5% to 95%, non-condensing
Cooling Requirement Natural air convection cooling
Storage Temp., Humidity -40 ~ +85°C 10 ~95% R.H
Altitude 15,000 ft minimum operation and -500ft to 40,000 ft storage
Vibration Frequency 5 to 50 Hz, acceleration ±7.35 M/(S*S), direction X,Y and Z Axis
Safety And EMC  
Safety Standards Complies with the applicable UL, CSA, RCM, CE and IEC safety requirements, including GS differences.
Official qualification for each, including CB scheme and listed for UL 60950-1. Note: RCM is only available for
the Australian Power Supplies with AS/NZS3112 AC Input Plugs
EMI Conduction & Radiation
  • Meets FCC Part 15 Class B, CISPR22.2 Class A
  • Meets MIL-STD-461F, 102,RE102,CS101,CS114,CS115,CS116,RS103
  • The limits for Army Ground shall apply except where Fixed Wing External/Helicopter limit is specified
Reliability Mean Time Between Failure (MTBF) >100,000 hours, MIL-HDBK217E at 40 degrees C ambient.
EMS Immunity Compliance to EN61000-4-2,3,4,5,6,8,11; ENV50204, EN61547, EN55024, heavy industry level (surge 4KV), criteria A
  • 1500VAC minimum from AC input to DC output
  • 1500VAC minimum from AC input to Chassis Ground
  • 500VAC minimum from DC output to Chassis Ground
Burn-In 48 hours at 100% rated load prior to final testing
MTBF 200K hrs minimum at 25C, convection cooled, per part calculation method
Warranty 3 Years
Mechanical Specifications
Physical Construction Rugged metal enclosure with potting offers improved shock and vibration performance and resistance to environmental factors
Dimensions 5.91(L) X 3.94(W) X 1.61(H) INCH
AC Input Cable 36~48” Black 18AWG wires, White ( Neutral), Black ( Line), Green ( Chassis)
DC Output Cable 36” +/-2″, with D-Sub 9 pin connector
COYTS Power Supply Mechanical Drawing


Part Number AC Input Plug
RTPS48-12-02A-UL NEMA 5-15P
RTPS48-12-02B-UL AS/NZS 3112
RTPS48-24-02A-UL NEMA 5-15P
RTPS48-24-02B-UL AS/NZS 3112
RTPS48-28-02A-UL NEMA 5-15P
RTPS48-28-02B-UL AS/NZS 3112


Output Pin Specifications
Pin 1 Shell, Chassis Ground Pin 6 +12Vdc Return
Pin 2 +12Vdc Pin 7 +12Vdc Return
Pin 3 +12Vdc Pin 8 +12Vdc Return
Pin 4 +12Vdc Pin 9 +12Vdc Return
Pin 5 +12Vdc


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