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The E-T-A 3120-N521-P7T1-W01D-3.5A is a thermal circuit breaker that combines overcurrent protection with the function of an ON/OFF switch. It utilizes a thermal-bimetal trip element and is designed for reliable overload protection of motors, pumps, transformers, and cables.
This two-pole breaker has a current rating of 3.5A and a voltage rating of up to 415V AC. It is designed for panel mounting, offering a space-saving solution for equipment protection. The breaker can be easily and quickly reset after tripping, and its positively trip-free mechanism ensures reliable disconnection even when the actuator is blocked.
Key features include its suitability for medical equipment according to IEC/EN 60601, and a typical life of 30,000 to 50,000 cycles depending on the configuration. The breaker is also available with optional features such as push-in terminals for simplified wiring and expandable functionality through add-on modules.
Typical applications for this thermal circuit breaker include medical and laboratory equipment, apparatus and machine construction, professional tools, household and garden appliances, office machines, audio equipment, and machine tools. Its robust design ensures maximum equipment availability through overload protection matched to the loads and quick resettability.
The circuit breaker has a voltage rating of 415V, with additional ratings of 240VAC and 50VDC.
The current rating is 3.5A, with a current rating range of 0.1 to 20A for the series.
It uses a rocker actuator.
The mounting type is panel mount.
The typical life is 30,000 cycles at 1 x IN under inductive load for AC 240V and DC 50V, and 50,000 cycles for 2-pole operation at AC 240V.
It is approved to CSA C22.2 No 235, GB 17701, IEC 60934, and UL1077 standards.