Bel Fuse / Power-One / Melcher M 1000 AC-DC/DC-DC Converter

The M 1000 is an AC-DC/DC-DC converter delivering up to 1000 W across multiple voltage configurations. Purpose-built for industrial and medical applications, this chassis-mount unit accepts AC input from 85–264 VAC or DC input from 60–150 VDC depending on series variant. Output voltage options span 3.3 VDC to 58 VDC with currents reaching 42 A at rated power, achieving efficiency up to 96.4%. The converter provides galvanic isolation between input and output while protecting both sides against electrical transients. Output circuits are individually controlled, fully isolated, and short-circuit proof. Logic-inhibit capability and optional output voltage adjustment are available on select models.

Technical Specifications AC input rating: 85–264 VAC. DC input rating: 60–150 VDC (series-dependent). Output voltage options: 3.3 VDC, 5.1 VDC, 12 VDC, 15 VDC, 24 VDC, 25.68 VDC, 30 VDC, 48 VDC, 58 VDC. Output current: up to 42 A. Power output: 1000 W. Efficiency: up to 96.4%. Operating temperature: –40 °C to +70 °C. Case temperature limit: 95 °C under forced cooling. Isolation: input to output galvanic isolation provided.

Key Features

Output overvoltage, overcurrent, and overtemperature protection

Input surge/transient suppression and inrush current limiting

Input over- and undervoltage lockout

Open- and short-circuit proof outputs

Logic inhibit function (Pin 2) for output control

Optional output voltage adjustment on select models

RoHS compliant; CSA/EN/IEC/UL safety approvals

Medical compliance: EN/IEC 60601-1 (MVPS1000 series)

Typical Applications Industrial electronic systems and medical equipment requiring regulated multi-voltage or single-output power conversion with high reliability and comprehensive fault protection.

Compatibility & Integration Chassis-mount enclosed design with fan cooling or convection cooling options. MBE1000 series features Molex Header connector; dimensions 9.51 × 5 × 1.61 inches.