Calex – 50 Watt 4:1 Encased DC/DC Converters (SBMQ12 Series)

The world of “brick” DC-DC converters has seen a steady size reduction. The SBM series makes another dramatic size shrink down to a “sixteenth brick” width (1.04 inches) while still retaining a high power output and full 2828 Volt DC isolation.

The converter family accepts 9 to 36 Volts DC inputs and delivers fixed outputs regulated up to within ±0.125%. The SBM converters are ideal for industrial and railway applications, datacom and telecom applications, cell phone towers, data centers, server farms and network repeaters.


  • High efficiency synchronous flyback topology
  • 9-36 Volts DC wide input range with a single 5, 12, 15 or 24 Volts for an output voltage
  • Up to 54 Watts total output power with overtemperature shutdown
  • 1.44″x1.04″x0.50″ (baseplate without flange)
  • Industry standard DOSA “brick” format and pinout
  • Extensive self-protection shut down features
  • Small footprint DC-DC converter, ideal for high current applications
  • Meets the AREMA® standard of 2828Vdc isolation
  • Operating temperature range -40 to +85°C with derating
  • Stable no-load operation with no required external components
  • Certified to UL 60950-1, 2nd Edition, EN60950-1 safety approvals


Safety Features

  • Basic insulation
  • 2828Vdc, Input-to-Output isolation
  • UL 60950-1, 2nd Edition
  • CAN/CSA-C22.2 NO. 60950-1
  • EN 60950-1
  • RoHS compliant