RBQ-12/33-D48xB-C Quarter-Brick 400 W Isolated DC/DC Converter

Murata Power Solutions' fully-isolated RBQ-12/33-D48xB-C module accepts a 36 to 75 VDC input voltage range and converts it to a low VDC output

The fully-isolated (2250 VDC) RBQ-12/33-D48xB-C module accepts a 36 to 75 VDC input voltage range (48 VDC nominal) and converts it to a low VDC output. Applications include 48 V-powered datacom and telecom installations, base stations, cellular dataphone repeaters, instruments, and embedded systems. Wideband output ripple and noise is a low 100 mV, peak-to-peak. The RBQ’s synchronous-rectifier topology with line regulation and fixed-frequency operation means excellent efficiencies up to 96%, enabling “no heatsink” operation for most applications up to +85 °C (with derating airflow). “No fan” or zero-airflow higher temperature applications may use the optional baseplate for cold-surface-mounting or natural-convection heatsinks. A wealth of electronic protection features includes input under-voltage lock-out (UVLO), output current limit, short-circuit hiccup, and over-temperature shutdown. Available options include positive or negative logic remote On/Off control, conformal coating, and various pin lengths. Assembled using ISO-certified automated surface-mount techniques, the RBQ series is certified to all UL and IEC emissions, safety, and flammability standards.

  • 386 W total output power, 11.7 VDC at 33 A
  • Regulated Intermediated Bus Architecture (RIBA) with PoL converters
  • 96% ultra-high efficiency at full load (typical)
  • 36 to 75 VDC input range (48 VDC nominal)
  • Standard quarter-brick footprint
  • Synchronous rectifier topology with 100 mV ripple and noise
  • Up to +85°C thermal performance (with derating)
  • Stable no-load operation
  • Multiple-unit parallel operation for increased current
  • Fully-isolated to 2250 VDC (basic)
  • Remote On/Off enable control
  • Extensive protection features – SC, OC, UVLO, OT
  • Certified to full safety, emissions, and environmental standards
  • Approved to UL 60950-1, CAN/CSAC22.2 No. 60950-1, IEC60950-1, EN60950-1 safety approvals (2nd Edition, with Amendment 1)

RBQ-12/33-D48xB-C Series

Manufacturer Part Number Description Available Quantity Datasheets
RBQ-12/33-D48NBS-C DC/DC CONVERTER 11.85V 33A 391W 30
RBQ-12/33-D48NB-C DC/DC CONVERTER 11.85V 33A 391W 49