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The Phoenix Contact 0903035 is a single-pole, solid-state electronic miniature circuit breaker designed for selective protection of 24V DC load circuits. It features active electronic current limitation for short circuits and an overload shutdown function starting from 1.1 times the nominal current (IN). This ensures faster reaction to overloads than the power supply unit, restricting residual current to 1.3 - 1.8 times the nominal current.
With a current rating of 4A and a voltage rating of 24VDC, this circuit breaker is suitable for applications requiring reliable load protection. It supports capacitive loads up to 20,000 µF and can be reset manually via a slide switch or electronically through a reset input. The device has a compact design width of 12.5 mm and mounts easily onto NS 35 DIN rails using screw connections.
Clear signaling of operating and fault states is provided by a multi-color LED and an integrated status output. Wiring and signaling tasks are simplified through the use of power rails and plug-in bridges. This component is ideal for protecting sensitive electronic loads in industrial automation, control systems, and power distribution applications where precise and fast-acting overcurrent protection is essential.
The current rating is 4A.
The voltage rating is 24VDC.
It is a solid state circuit breaker.
It has 1 pole.
It uses a slide switch actuator.
It is designed for DIN rail mounting.
