DIN Rail Accessories

e-Fuses

복잡한 산업용 24V DC 설비에서는 개별 부하를 과전류(Overcurrent) 및 단락(Short circuit) 고장으로부터 보호하는 것이 필수입니다. 특히 중앙의 대전류 전원 하나로 여러 저전력 부하에 전원을 공급하는 경우, 이러한 보호가 더욱 중요합니다. 한 부하에서 고장이 발생하면 시스템 전체 전압이 떨어져 다운될 수 있고, 더 심하면 지속적인 과전류로 인해 배선이 손상되거나 화재로 이어질 위험도 있습니다. 하지만 DC 퓨즈나 회로차단기는 적용 시 문제가 생길 수 있습니다. 너무 빨리 차단되어(불필요한 트립) 정상 동작까지 막거나, 반대로 차단되기 전까지 과도한 전류를 흘려보내는 경우가 있기 때문입니다.

Redundancy Diodes

Redundancy diodes (also known as OR-ing diodes) are electrical components that allow two or more power supply outputs to be safely connected in parallel. In redundancy mode, if any power supply fails, the RD module will prevent current flowing back into the failed unit, ensuring continuous uninterrupted operation. In current share mode, two power supplies can be connected in parallel to generate double the output current. The RD module will ensure that the output current is equally split between the two sources.

Redundancy diode modules are used in mission-critical applications to prevent costly downtime and to ensure fault or supply failure tolerance. Use examples include industrial automation, servers and data centers, telecommunications and packaging plants.
  Series Current (A) Vin (V) Main Vout (V) Mounting Type Package Style
1 RECOM | RACPRO1-4SP Series | AC/DC, DIN-Rail, 4 Channels Output
Focus
5, 10 22 - 28 24 DIN-Rail DIN-Rail (IP20)
RECOM e-Fuse in an industrial application

DIN Rail Smart Protection: RACPRO1 E-Fuse Modules

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e-Fuse

새로운 DIN 레일 스마트 보호 모듈

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DIN rail power supplies

RACPRO1 시리즈를 통한 신뢰성 높은 퓨즈 및 회로 차단기 트립

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RECOM e-Fuse

e-Fuse RACPRO1-4SP

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Frequently Asked Questions

An electronic fuse is an active protection device used to safeguard DC power systems from overcurrent and short-circuit faults. Unlike traditional melting fuses that rely on thermal destruction, an e-fuse uses high-speed electronic monitoring and a power MOSFET to disconnect the circuit instantly when a fault is detected.
An electronic circuit breaker provides significantly faster response times and higher precision. They eliminate "nuisance tripping" caused by temporary inrush currents and, unlike traditional fuses, do not require physical replacement after a fault. They also offer selective load protection, ensuring only the failing branch of a circuit is isolated.
Electronic fuses are widely used in industrial 24VDC systems, automation cabinets, control systems, and distributed power architectures with multiple connected loads. They are essential when a single high-current power supply supports multiple sensitive loads, such as PLCs, sensors, and actuators, where a fault in one component could jeopardize the entire system.
By providing intelligent 24VDC load protection, e-fuses prevent a single short circuit from pulling down the main power bus. This allows the rest of the industrial network to remain operational while a specific fault is isolated, minimizing downtime and simplifying troubleshooting.
A redundancy diode module allows current to flow in one direction only, so if two or more power sources are connected in parallel, current cannot flow from one power supply into the other or from the output back into any power supply. The diode function ensures that even if one power supply fails with an output short circuit, the healthy power supply can still take over and continue to supply the load.
Redundancy diode modules are available with power diodes, but the forward voltage drop across the diodes means that they dissipate a lot of heat at high currents. The RECOM RACPRO1-RD module uses active MOSFET decoupling to substantially reduce the power loss and heat dissipation. This is not just more efficient, delivering more available power to the load, but also reduces the ambient temperature inside the switching cabinet and increases its operational lifetime.

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