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The Phoenix Contact 0903026 is an electronic miniature circuit breaker designed for selective protection of 24V DC load circuits. It features a solid-state design with 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.
This circuit breaker supports capacitive loads up to 20,000 µF, allowing for reliable startup of such loads. It can be reactivated manually via a slide switch or through an electronic reset input. The device has a design width of 12.5 mm and is equipped with screw connections for easy wiring. It mounts directly onto NS 35 DIN rails.
Key features include selective load protection with an electronic shutdown characteristic curve, active current limitation, and clear signaling via LED and status output. The 4A nominal current rating makes it suitable for various DC load protection applications where precise and fast-acting overcurrent protection is required.
The rated current is 4A.
The voltage rating is 24VDC.
It is a solid state circuit breaker.
It is a 1-pole circuit breaker.
It mounts on a DIN rail.
It uses a slide switch actuator.
It uses screw terminals.