DIN-rail electronic fuses feature channel-independent protection

RECOM has developed the RACPRO1-4SP series of four-channel electronic fuses, designed to complement their DIN-rail power supply line. These new devices distribute 24V supply voltage across four independently current-limited channels, with models available in both 5A and 10A configurations per channel.

The engineering design incorporates sophisticated safety and operational features. The system employs sequential channel activation with programmed delays to manage inrush currents effectively. An integrated soft-start mechanism enables hot-swap and hot-plug functionality, allowing operators to connect and disconnect loads during operation without system disruption.

Technical specifications include an under-voltage lockout system with hysteresis, engineered to prevent startup complications and maintain consistent operation under heavy loads. Each channel supports 150% of rated current for 5-second durations, accommodating high inductive and capacitive startup loads. The system can handle capacitive loads up to 20mF through controlled output voltage ramping.

The protection architecture implements a hierarchical shutdown sequence during overload conditions, preserving critical loads through prioritized power distribution. Short circuits or extended overloads trigger selective channel disconnection, isolating affected circuits while maintaining power to functional channels. The overcurrent protection system offers both auto-recovery and latching modes.

Installation and maintenance features include paired input terminals and separate load terminals for streamlined wiring configuration. The design supports multi-module expansion, enabling complex system architectures with individualized load monitoring. Maintenance personnel can access individual channel controls, protected by key-lock functionality to prevent accidental deactivation.

System integration capabilities include DC-OK relay reporting and remote reset functionality, facilitating connection with PLCs and SCADA systems. The RACPRO1-4SP series comes with a three-year warranty and is available through authorized distributors or directly from RECOM.

For additional technical specifications and ordering information, interested parties can visit RECOM’s website at www.recom-power.com.