Bel Fuse / Power-One SPM3E2KS442 Modular High Power Supply (28V/27A)

The Bel Fuse/Power-One SPM3E2KS442 is a modular DC output module engineered to deliver 28V at 27A from a 300 VDC system power bus. Operating as part of the SPM3 series architecture, this switch-mode module accepts input from either AC utility mains or a user-supplied 300 VDC source, making it adaptable to diverse system topologies. The modular platform supports up to 21 outputs per power supply and enables over 10 million configuration possibilities across the series.

Technical Specifications

Output Voltage: 28V

Output Current: 27A

System Input Bus: 300 VDC

Power Factor Correction: Up to 99% PFC (EN60555 compliance)

Output Regulation: Fully regulated and isolated single outputs

Module MTBF: Greater than 5 million hours

Vibration Performance: 6 GRMS, 3-axis, 10 Hz to 2000 Hz

Key Features

Parallelable outputs with current-sharing capability eliminates external balancing networks

No minimum load requirement on most outputs simplifies system design

System and individual module inhibit control signals enable flexible power sequencing

Modular single-width slot bank form factor optimizes board density

AC input sections feature extensive transient protection for harsh environments

Metric mounting available on selected models

Compatibility & Integration

Certifications: EN60950/UL1950 approved, CE marked to Low Voltage Directive

Integrates within SPM3 modular platform supporting multiple isolated DC outputs

Compatible with both AC utility and DC source architectures via 300 VDC intermediate bus