Bel Fuse / Power-One CPA500-4530S218 AC-DC Power Supply

The Bel Fuse/Power-One CPA500-4530S218 is a 500 W AC-DC power supply engineered for CompactPCI® systems and demanding applications in communications, industrial, military, and aerospace environments. Built on patented EDGE™ technology, this unit delivers high power density and 85% efficiency while maintaining thermal stability across wide input ranges. Four independent regulated outputs support diverse load requirements, with integrated protection against overload, short-circuit, and open-circuit faults. The design accommodates both AC (90–264 VAC, 50–60 Hz) and DC (36–75 VDC) input sources via active power factor correction, eliminating manual voltage selection. Hot-swap capability and soft-start circuitry enable field replacement and controlled power-up sequencing without system interruption. Remote sense lines and inhibit/enable control inputs provide flexible integration into managed power architectures.

Technical Specifications Electrical

Input voltage: 90–264 VAC or 36–75 VDC

Input frequency: 50–60 Hz

Maximum input current: 7.2 A to 8.0 A

Output 1: 5 V @ 50 A

Output 2: 3.3 V @ 60 A

Output 3: 12 V @ 8–12 A

Output 4: −12 V @ 4 A

Total rated power: 500 W

Efficiency: 85%

Isolation voltage: 1.5 kV

Power factor correction: Active Physical

Dimensions: 162.5 mm (L) × 40.6 mm (W) × 128.7 mm (D)

Height: 261.874 mm (mounting dependent)

Weight: 1.65–1.77 kg

Pin count: 47; terminal count: 48

Mounting: Chassis, desktop, rack Environmental & Compliance

Operating temperature range: −25 °C to +50 °C

Overtemperature protection: Built-in

Standards: CSA, EN, IEC, UL/CSA 62368-1

RoHS compliant; lead-free

China RoHS compliant

Key Features

Four independent, regulated output channels

Low inrush current; varistor-protected input transient suppression

Hot-swap operation without system shutdown

Soft-start circuitry for controlled power sequencing

Remote sense and inhibit/enable control inputs

Continuous overload, short-circuit, and open-circuit protection

Wide input voltage range eliminates manual selection

Typical Applications CompactPCI® platforms, communications infrastructure, industrial control systems, military and aerospace power distribution, field-replaceable modular power subsystems.

Compatibility & Integration Designed as a plug-in module for CompactPCI® chassis. Remote sense capability supports precision load regulation. Inhibit and enable inputs facilitate sequencing and system management integration.