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The E-T-A 1620-3-20A is a single-pole, thermal miniaturised circuit breaker (Mini-CBE) specifically engineered for automotive applications. It fits into fuse blocks designed to ISO 8820-3, Type F.
This circuit breaker has a current rating of 20A and a maximum voltage rating of 29V DC. It is designed to meet the requirements of SAE J553 and is suitable for protecting electrical systems in passenger cars, trucks, buses, and watercraft.
The device operates within an ambient temperature range of -40°C to +85°C. It offers various reset options, including automatic reset for DC 12V systems and an open circuit version with modified reset to SAE standards. The circuit breaker will reset after the load is removed, making it suitable for installation in hard-to-reach locations.
Key technical data includes a service short-circuit breaking capacity of 300 operations at 2 x IN and an ultimate short-circuit breaking capacity of at least 2,000 A. It also meets stringent environmental and mechanical test standards for vibration, shock, corrosion, and humidity.
The circuit breaker is rated for 12V DC and 24V DC nominal operation, with a maximum voltage rating of 29V.
The ambient temperature range is -40°C to +85°C.
At 12V DC, nominal 20A with maximum 30A. At 24V DC, maximum 25A.
It is a single-pole (1 pole) circuit breaker.
The actuator type is push-to-reset.
Operating area: IP40 (variant -3) or IP50 (variants -1, -2). Terminal area: IP00.
Ultimate breaking capacity is minimum 2000A for one break operation. Service breaking capacity is 300 operations at 2× rated current.