HiTron HSU45-10 Power Supply

The HiTron HSU45-10 is a 45 W switching mode power supply engineered for industrial and commercial VMEbus systems. This Eurocard-format unit delivers regulated 5 VDC at 9 A output with dual-selectable 115 Vac / 230 Vac input (47–63 Hz), making it suitable for distributed embedded applications demanding compact, reliable DC conversion. Forward-topology design ensures fast transient response and integrated protection against overload, short circuit, and overvoltage conditions.

Technical Specifications Electrical Performance

Output: 5 VDC @ 9 A

Input: 115 Vac / 230 Vac (47–63 Hz, user-selectable)

Input current: 0.88 A @ 115 Vac; 0.44 A @ 230 Vac

Line regulation: ±0.4% typ.

Load regulation: ±1.0% typ. (main output)

Efficiency: 70–75% typ.

Switching frequency: 100 kHz typ.

Transient response: 3 mS typ. (25% load step)

Hold-up time: 20 mS @ 115 Vac / 50 mS @ 230 Vac

Earth leakage: 0.3 mA typ. @ 230 Vac Physical & Thermal

Form factor: 3U × 6 HP × 160 mm (Eurocard, VMEbus-compatible)

Weight: 537 g

Cooling: Free air convection

Operating temperature: 0 to +50°C (full load); derates to +70°C (half load)

Storage temperature: −20 to +85°C

Temperature coefficient: 0.04%/°C typ. Protection & Interfaces

Overload & short-circuit protection: Full

Overvoltage protection: Latch-type at main output

Remote sense: Installed on main output

Remote logic inhibit: Available

Power-fail signal: Installed

Input fuse: T2.0A / 250 Vac

Connectors: DIN 41612 (input/output, rear)

Key Features

Compact 3U Eurocard format fits standard VMEbus backplanes

Dual input voltage selection eliminates region-specific supply concerns

Built-in remote sense corrects line-drop errors in distributed systems

Fast transient settling (3 mS) supports dynamic loads

Low earth leakage meets Class I safety requirements

Integrated power-fail notification for system monitoring

Typical Applications

Industrial control and process automation

Embedded VMEbus systems and crate assemblies

Commercial telecommunications equipment

Instrumentation and test racks requiring regulated 5 V distribution

Compatibility & Integration The HSU45-10 conforms to IEC 60950-1 / UL 60950-1 Class I and meets CISPR 22 & FCC Class B EMI limits. DIN 41612 rear connectors ensure compatibility with standard Eurocard backplane installations. Remote inhibit and sense functions allow integration with larger power distribution and monitoring schemes. Limited current availability; replacement models such as HSU45-10N may be available from the manufacturer.