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
