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The E-T-A 3120-N Series thermal circuit breaker is a single-pole device that combines overcurrent protection with the functionality of an ON/OFF switch. It utilizes a thermal-bimetal trip element for reliable operation.
This circuit breaker is designed for overload protection of motors, pumps, transformers, and cables. It features a current rating range of 0.1 to 20A and a voltage rating of up to 415V AC or 50V DC. The device is panel mountable and has a rocker actuator.
Key features include a positively trip-free mechanism for reliable disconnection, even with a blocked actuator. It is suitable for applications in medical and laboratory equipment, apparatus and machine construction, professional tools, and household appliances. The breaker can be easily and quickly reset after tripping, ensuring maximum equipment availability and reduced downtime.
Additional options include push-in terminals for simplified wiring and expandable functionality through add-on modules for low voltage release, auxiliary contact, remote trip, or fast magnetic trip.
The rated voltage is AC 240V and DC 50V, with AC 415V available upon request.
The current rating range is from 0.1A to 20A.
This is a single-pole (1-pole) circuit breaker.
It is a thermal circuit breaker.
It is designed for panel mounting.
The typical life is 30,000 cycles for 1-pole devices under specified conditions.