The Siemens 3RV1421-4BA10 is a circuit breaker designed for transformer protection, sized as S0, suitable for current ranges of 14 to 20A. This breaker features A-release characteristics, allowing it to automatically disconnect the circuit based on load variations, effectively preventing transformer damage due to overloads or short circuits. It uses screw terminal connections for easy installation and wiring and is designed with standard switching capacity, making it ideal for protecting transformers and other electrical devices in protection circuits.
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