Siemens 5SY41 1492-D Circuit Breaker

Siemens 5SY41 is a one‑pole supplementary miniature circuit breaker designed for DIN‑rail mounting on standard 35 mm rails, providing additional protection for control circuits and auxiliary loads. The device is rated for up to 277 V and is offered with selectable current ratings, so you choose the ampere rating that matches your circuit. Trip curves available for 5SY41 models include B, C, and D, allowing tailoring of the breaker’s response to your load characteristics. This 5SY41 device is part of Siemens’ miniature circuit‑breaker lineup and is commonly used to safeguard low‑voltage control circuits within industrial or building automation installations, all in a compact DIN‑rail form factor suitable for panelboards and distributed control cabinets where space is at a premium.