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PM-20 Series - 20W Single Output Encapsulated Medical Switching Power Supply



The PM series has been developed to extend our medical product line to include 5 to 20W applications. Featuring a low leakage current of 200uA at 264VAC this unit can be equiped into non-patient contact medical equipment and still comply with class B as per EMI regulations. With energy saving and the environment in mind the no load power consumption is lower than 0.75W so that it complies with the requirements for “green mode” power supplies. Standard functions include short circuit, over load and over voltage protections. Suitable for use in general medical or for industrial usage that require low leakage current, general electronic applications and low profile IT equipment these on-board type PSU’s can be applied on the main control PCB of the final systems.

Additional information







  • Universal AC input / full range
  • Protections: Short circuit / Overload / Over voltage
  • Low leakage current <300µA
  • Cooling by free air convection
  • Medical Safety approved (2 x MOPP between primary to secondary)
  • Ultra miniature size, light weight
  • No load power consumption <0.75W
  • 100% full load burn-in test
  • Fixed switching frequency at 90KHZ
  • High reliability
  • Suitable for BF application with appropiate system consideration
  • 3 years warranty
  • Non-patient connect medical
  • General electronics
  • IT equipment
  • Industrial
Input Voltage85 ~ 264VAC 120 ~ 370VDC
Input Frequency47 ~ 440Hz
AC Current0.6A/115VAC 0.4A/230VAC
Inrush Current30A/115VAC 65A/230VAC typically, cold start
Leakage Current<200uA / 240VAC
Setup, Rise Time500ms, 20ms/230VAC 500ms, 20ms/115VAC at full load
Hold Up Time50ms/230VAC 16ms/115VAC typically at full load
Over Load ProtectionAbove 105% rated output power
Hiccup mode, recovers automatically after fault condition is removed
Over Voltage ProtectionShut off o/p voltage, clamping by zener diode
Working Temperature-20°C to +60°C (Refer to output load derating curve)
Working Humidity20 ~ 90% RH non-condensing
Storage Temperature, Humidity-40°C to +85°C, 10 to 95% RH
Temp Coefficient±0.03%/°C (0 ~ 50°C)
Vibration10 ~ 500Hz, 2G 10min./1cycle, Period for 60min.each along X, Y, Z axes
Satety StandardsUL60601-1,TUV EN60601-1, IEC60601-1 Approved
Withstand VoltageI/P-O/P:4KVAC I/P-FG:1.5KVAC O/P-FG:1.5KVAC
Isolation ResistanceI/P-O/P, I/P-FG, O/P-FG:100M Ohms/500VDC/25°C/70% RH
EMCCompliance to EN55011(CISPR11), EN55022 (CISPR22) Class B, EN61000-3-2,-3
EN61000-4-2,3,4,5,6,8,11; ENV50204, EN55024, EN60601-1-2, EN61204-3 Medical level, criteria A.
MTBF487.8Khrs min. MIL-HDBK-217F (25°C)
Dimensions94 x 56 x 22.7mm
  • CB
  • CE
  • TUVMedical