500 & 600W Quarter-Brick Bus Converters with PMBus Digital Communications

Murata Power Solutions
Part Number Information
Part #: Price/Availability:
DRQ-12/42 Buy Now
DRQ-12/50 Buy Now

Incorporating a 32-bit ARM7 Processor, the 600W DRQ-12/50-L48 & 500W DRQ-12/42-D48 models are the second product families offered by Murata Power Solutions to include a PMBus compatible digital interface. The DRQ family is packaged in the industry standard quarter-brick format incorporating the Advanced Bus Converter (ABC) pinout for PMBus communications to an isolated DC-DC converter.

The -L48 module has a 12 VDC 50 Amp output, accommodates an input voltage range from 44 to 57 VDC and is ideal for Intermediate Bus Applications (IBA) with a tightly controlled power source. The -D48 converter provides a 11.5 VDC 43.5 Amp output and supports the TNV 2:1 wide input voltage range of 38 to 75 VDC. These highly efficient units, typically 95.5%, run much cooler than less efficient units making them ideal for use in modern space constrained telecoms and data networking equipment.

The PMBus interface facilitates power management features not previously available in an isolated power module rated at 500-600W in a 1/4 brick format. By interfacing the DRQ module to the system's 12C bus, a system engineer can monitor critical system level performance requirements that include Vin, lin, Vout, lout and operating temperature. The PMBus can also be used to set warning flags for temperature, Vin, Vout, lout and allows for the user to customize parameters such as Vout, Vin Turn on/off thresholds, output over voltage protection and output current limit and ramp-up characteristics to name a few.

Also, in applications where additional output power is required or to build redundancy into the power architecture, two or more converters can be connected in parallel.


  • Fixed DC outputs, 11.5V @ 43.5A or 12V @ 50A
  • Advanced Bus Converter industry standard quarter-brick with digital PMBus interface
  • High efficiency
  • Optional five pin version (DOSA compatible pinouts)
  • Baseplate and heatsink options


  • MicroTCA
  • Servers
  • Storage
  • Networking equipment
  • POE applications
  • Wireless Networks
  • Industrial Applications
  • Test equipment