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The Phoenix Contact 2800851 is a single-pole thermomagnetic device circuit breaker designed for reliable protection of 230/240 V AC power supply systems. It features a medium-blow tripping characteristic (M1) and a 1 PDT contact, making it suitable for monitoring and signaling applications.
With a compact design and precise nominal current levels, this circuit breaker offers modular expansion possibilities through its uniform, plug-in housing concept. It can protect power supply systems up to 277V AC and 50V DC, with a rated current of 5A. The device operates within an ambient temperature range of -30°C to 60°C.
Installation instructions note that when mounted in rows, the nominal device current may need to be limited to 80% or overdimensioned accordingly. The circuit breaker has a degree of protection of IP30 in the actuation area and is mounted on a base element. It is constructed with an insulating material group II and a pollution degree of 2.
Key technical data includes a rated surge voltage of 2.5 kV and an insulation resistance of > 100 MΩ at 500 V DC. The tripping method is thermomagnetic with a trip-free mechanism. A required backup fuse of 20A is specified.
The rated current is 5A according to IEC 60934 and for inductive loads under UL 1077 and UL 508.
The rated voltage is 277 V AC according to UL 1077 and UL 508 with a plug-in base.
The ambient temperature range for operation is -30 °C to 60 °C.
The degree of protection for the actuation area is IP30.
The tripping characteristic is M1 (medium-blow).