Motor starter M250 1NO/1NC (0.16A - 0.25A) 606821

Motor protection with M250 circuit breakers

The M250 motor circuit breaker is a reliable solution for protecting electric motors from the effects of overloads and short circuits. The device effectively protects circuits where temporary but significant current increases may occur during operation – typical for starting motors. The design combines both a thermal and electromagnetic release, providing comprehensive protection.

M250 circuit breakers are available in various versions, tailored to the specific needs of the installation. This model (0.16A - 0.25A) is equipped with an integrated auxiliary contact (1NO1NC), which expands its functionality and enables integration with control and signaling systems.

Characteristics and application

The M250 circuit breaker is characterized by a solid construction – it is a complete device in a housing, ready for mounting. The rated continuous current of 0.25A and the overload release setting range (0.16…0.25A) make it an ideal choice for applications requiring precise protection of low-power motors. The rated operating power for AC-3 is 7.5 kW at 400V and 4.5 kW at 230V.

• Versatile application: protection of electric motors in industrial and commercial installations.
• Thermal protection: protects the motor from overheating caused by overload.
• Short-circuit protection: immediate disconnection of the circuit in the event of a short circuit, minimizing the risk of damage.
• Status indication: integrated auxiliary contact allows remote monitoring of the circuit breaker status and reporting of any failures.
• Mounting: screw connection ensures a secure and durable connection of wires.

Construction and technical parameters

The M250 circuit breaker has been designed with easy installation and reliable operation in mind. Its compact dimensions (45 mm wide, 89 mm high and 72.5 mm deep) allow installation even in limited spaces. The IP3X degree of protection provides protection against contact and the ingress of solid objects larger than 2.5 mm – important in industrial environments. The rated short-circuit breaking capacity Icu at 400V AC is as high as 6kA, which guarantees effective protection even in the event of serious disturbances in the power supply network. The circuit breaker has a lever as an actuator and a thermomagnetic tripping method – a standard solution ensuring a quick reaction to overloads and short circuits. The short-circuit release setting range is 2.8…4.2 A, allowing it to be adapted to the specifics of the protected installation.