Bel Fuse / Power-One SPL53-4101 Power Supply Board

The Bel Fuse/Power-One SPL53-4101 is an open-frame linear power supply board engineered for precision power conversion and distribution across demanding industrial, medical, rail, eMobility, and telecommunications applications. This design delivers stable, low-noise output ideal for sensitive equipment including amplifiers, broadcast systems, ATE, and control instrumentation requiring minimal ripple and exceptional regulation.

Technical Specifications Input Power

AC Input: 100 to 264 VAC nominal, 47–63 Hz

10% output current derating required for 50 Hz operation Output Performance

Output Ripple: 5.0 mV peak-to-peak maximum (2–15 V units); 0.02% peak-to-peak maximum (20–200 V units)

Transient Response: ≤50 µs for 50% load change

Line Regulation: ±0.05% for 10% line change

Load Regulation: ±0.05% for 50% load change

Stability: ±0.3% over 24 hours (post 1-hour warm-up)

Temperature Coefficient: ±0.03%/°C maximum Protection & Control

Short Circuit Protection: Automatic current limit/foldback

Overload Protection: Automatic current limit/foldback

Overvoltage Protection (OVP): Built-in on 5 V outputs (6.2 V ± 0.4 V); optional adjustable modules available (6.4–34 V range); unavailable for 48 V models

Output Inhibit: Standard capability

Remote Sense: Provided on most outputs

Parallel Operation: Master/slave configuration supported Thermal Requirements

Operating Temperature: 0°C to 50°C full-rated; linear derate to 40% at 70°C

Cooling: 12 CFM forced air cooling required above 80% total rated output power to meet IEC 380/950 Interfaces

Bus A and Bus B ports

IEEE-STD-488 port

Trap Detect, XMIT Sync, and Composite Video outputs

Key Features

CE marked to Low Voltage Directive (LVD)

Domestic and international regulatory standard approval

Isolated output available via jumper W1 removal (specific models)

High-reliability design for systems

Typical Applications Amplifier systems, broadcast equipment, automated test equipment, acoustic instrumentation, and precision control electronics requiring ultra-low output noise and ripple.

Compatibility & Integration The SPL53-4101 integrates with IEEE-STD-488 and MIL-STD-1553 test and measurement ecosystems, supporting multi-unit parallel architectures for scalable power delivery.