Wide Input, Isolated DOSA Quarter Brick DC-DC Converters

Murata Power Solutions
Part Number Information
Part #: Price/Availability:
UWQ 240 Buy Now

The UWQ 240 Watt quarter-brick DCDC converter is designed for wireless backhaul, smart grid, and a broad range of networking and other telecommunications applications. With a fixed 12 VDC / 20 A single output this DOSA compatible open-frame quarter brick package occupies only 58.4 x 36.8 x 11.7 mm. This compact device helps designers conserve valuable board footprint for today's space-constrained designs.

The converter accepts a wide 3:1 input range of voltage from 18 to 60 VDC around a nominal 48 VDC. A remote sense feature provides the automatic adjustment of Vout to make up for line and load losses while a trim function allows ±10% of Vout. The series has tight load and line regulation that ensures that the output voltage does not vary beyond ±1.25% when the load changes.

The UWQ-12/20-T48 has a typical efficiency of 92% and up to 3 units can operate in parallel in order to provide redundancy or load sharing of a higher power requirement.

Controls include remote On/Off control of either negative or positive logic. In addition, the converter has a number of protection features including overcurrent, over-temperature, input under-voltage and output short circuit.

The UWQ converter is designed to operate in environments ranging from -40 to + 85°C. Input to output isolation is 2,250 VDC with a Basic insulation system to meet industry safety requirements. An optional baseplate is offered to suit conduction cooled applications.


  • Fixed DC outputs, 12V @ 20A
  • Industry standard quarter brick open frame package
  • Wide range 18 to 60 Vdc input voltages
  • Remote ON/Off enable control
  • DOSA-compatible pinouts and form factor
  • Certified to UL/60950-1, CSA-C22.2 No. 60950-1, 2nd edition safety approvals


  • Embedded systems, datacom and telecom installations, wireless base stations
  • Disk farms, data centers and cellular repeater sites
  • Remote sensor systems, dedicated controllers
  • Instrumentation systems, R&D platforms, automated test fixtures
  • Data concentrators, voice forwarding and speech processing systems