Siemens SENTRON 5SL4620-8 — D-curve MCB for high-inrush loads
The Siemens SENTRON 5SL4620-8 is a 3P+N miniature circuit breaker with a D tripping characteristic, rated 20 A at 400 V AC and a 10 kA breaking capacity per EN 60898. The 3P+N configuration includes a switched neutral, so it suits single-phase or three-phase circuits where neutral disconnection is required. Rated 20 A at 30 °C ambient; at 40 °C the continuous rating derates to 18.48 A, and at 55 °C to 15.92 A — factor this into panel thermal calculations if the breaker is in a warm enclosure.
IP20 with connected conductors; touch protection is built in, so no additional finger-safe covers are needed for the terminals. Sealable and halogen-free, silicon-free construction — suitable for installations with strict material-compatibility requirements (e.g., clean rooms, medical facilities). Degree of pollution 2, overvoltage category III, energy limitation class 3.