250W, Dual-output Railway AC-DC Power Supplies with Pure Convection Cooling

PFC 252R-HSA-F3 Series dual-output railway AC-DC power supplies with PFC-input and pure convection cooling 


Dual-output, PFC-input railway AC-DC power supplies with pure convection cooling by heatsink fins offer flexible mounting options

The PFC 252R-HSA-F3 series dual-output railway AC-DC power supplies with pure convection cooling deliver up to 250W output power. The units employ active power factor correction (PFC) to convert a universal ac-input (95V to 264Vac) to two outputs. Output V1 provides any voltage 12V to 110Vdc/10A to 14A max; output V2 offers any voltage 5V to 24Vdc/8A to 2A. Both outputs are individually regulated, returns are common. Other input/output voltages are available on request. An optional built-in redundancy diode allows for parallel and N+1 operation. 

The PFC 252R-HSA-F3 AC-DC power supplies are designed for applications where a suitable heatsinking surface is not available and only pure convection cooling is feasible. A heatsink assembly is attached to the under-surface of the F3 power supply module, providing a pure convection cooled solution. Additional cooling is achieved by natural convection through the cooling slots. This enables operation within a -40 to +55°C temperature range for full specification without derating. Wider temperature ranges are available on request. 

F3-HSA heatsink assembly

F3-HSA heatsink assembly, chassis-mount

The heatsink assembly can be mounted to a chassis or DIN-rail. The heatsink is also suitable for mounting on thermally non-conductive surfaces such as wood, plastic and brick walls. Chassis-mounting is recommended for installation on railway rolling stock; DIN-rail mounting is only suitable for trackside applications. 

The PFC-input railway AC-DC power supplies comply with EN 61000-3-2 directive for low input harmonic distortion. They meet the requirements of EN 50155 for electronic equipment used on railway rolling stock. They are equipped with heavy filtering on the input and output and comply with EN 50121-3-2. They also meet EN 50121-4, EN 61000-4-2 (ESD), EN 61000-4-3 (RF Immunity), EN 61000-4-4 (Fast Transients), and EN 61000-4-6 (Conducted Immunity). Other electronic protection also includes 4300Vdc input-output isolation, overload protection and output overvoltage protection. 

F3-HSA heatsink assembly

F3-HSA heatsink assembly with DIN-rail clips

ABSOPULSE Electronics is an original equipment manufacturer (OEM) engaged in the design and manufacture of an extensive range of railway and industrial quality power conversion solutions. We specialize in fully custom solutions. All of our existing designs can also be modified to meet customer specifications. To discuss any of your power conversion requirements, please get in touch with us.

Key PFC 252R-HSA-F3 Specifications

  • 250W Railway AC-DC power supplies;
  • Comply with EN50155;
  • EMI: EN50121-3-2;
  • Input: 95V to 264Vac universal;
  • Active power factor correction (PFC) on input;
  • Power factor meets EN61000-3-2
  • Two individually regulated outputs;
  • Output V1: any voltage 12V to 110Vdc10A to 14A max;
  • Output V2: any voltage 5V to 24Vdc8A to 2A;
  • Line/load regulation: ±1% combined from no load to full load on both outputs;
  • Cooling: natural convection by heatsink fins;
  • -40°C to +55°C operating temperature range for full specification;
  • Chassis-mount and DIN-rail mount options available;
  • F3 chassis on HSA heatsink block: 132 x 102 x 300 mm (5.2″ x 4″ x 11.8″) total size

Generic Data sheet – PFC 252R-HSA-F3 railway AC-DC power supply

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