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The Phoenix Contact 0903044 is an electronic miniature circuit-breaker designed for selective protection of 24V DC load circuits. It offers 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, with residual current restricted to 1.3 - 1.8 times the nominal current.
This circuit-breaker supports capacitive loads up to 20,000 µF, shutting down only in the event of an overload or short circuit. Once a fault is detected, the load output is blocked, interrupting current flow. The device can be reactivated using an electronic reset input or manually via the slide switch.
With a design width of 12.5 mm, it easily snaps onto NS 35 DIN rails and is equipped with screw connections. The unit provides clear signaling through a multi-color LED and an integrated status output, displaying operating and fault states. It is suitable for wiring and signaling tasks using power rails and plug-in bridges.
Key specifications include a 3A current rating, 24V DC voltage rating, solid-state breaker type, and single-pole design. It is mounted on a DIN rail and features a manual slide switch actuator.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The current rating is 3A.
The voltage rating is 24 VDC.
It is a solid-state electronic miniature circuit-breaker.
It is designed for DIN rail mounting.
The nominal current can be selected in fixed current strengths from 0.5 A to 12 A.
It enables capacitive loads of up to 20,000 µF to be switched on.
The overload shutdown function activates from 1.1 times the nominal current (IN) upwards.