Mil-COTS Unregulated DC-DC Bus Converters

These military-grade bus converters are the next-generation, board-mountable, isolated, fixed switching frequency DC‑DC converters that use synchronous rectification to achieve extremely high conversion efficiency. The Mil-COTS series provides an isolated step-down voltage from 270V or 600V to 31V intermediate bus with no regulation in a standard half-brick module. MCOTS Bus converters are ideal for creating the mid-bus voltage required to drive point-of-load (non-isolated) converters in Intermediate Bus Architectures.

Operational Features

  • High efficiency, up to 95% at full rated load current
  • Delivers up to 65A @ full power with minimal derating
  • Operating input voltage range: 230-400V, 440-700V, and 800-1000V
  • Fixed frequency switching provides predictable EMI
  • Industry-standard half-brick pin-out configuration
  • -55°C to +100°C Operating Temperature


  • Input under-voltage and over-voltage lockout protects against abnormal input voltages
  • Output current limit and short circuit protection (auto-recovery)
  • Thermal shutdown
  • On/Off control referenced to input side
  • Inherent current share (by droop method) for high current and parallel applications
  • Clock synchronization (primary reference)

Series Table

MCOTS-B-600-31-HT440 V – 700 V400 V – 750 V32.5 A1000W
MCOTS-B-270-31-HT230 V – 400 V155 V – 450 V32.5 A1000W
MCOTS-B-385-270-HT230 V – 400 V155 V – 450 V3.7 A900W
MCOTS-B-270-31-FT230 V – 400 V230 V – 450 V65 A2015W

Ask for Assistance

Selecting the right power supply for your application is not a small task. Let our technical sales engineers guide you through the process of choosing the right solution for your needs.

Below some parameters usually required to size and select the right power supply:

  • Power & control requirements
  • Output & Input Voltage / Multioutput Voltage / Variable Voltage
  • Redundancy level
  • Mounting
  • Inrush Current
  • Environmental specifications (Temperature, altitude, vibration, shock)
  • Specific Industries Standards (Railway, Military, Medical)
  • Terminals

Contact Our Team

Contact our team of experienced engineers to discuss your unique power conversion and backup needs. We offer a wide range of highly reliable components that can be integrated and customized to create a solution that meets or exceeds your requirements.

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