Siemens 5SY4205-7 Safety Relay Module

Siemens 5SY4205-7 is a two-pole miniature circuit breaker from the SENTRON 5SY4 family, rated for 400 V AC with a 0.5 A nominal current and a 10 kA short‑circuit breaking capacity. It utilizes a Type C tripping curve, suitable for general‑purpose protection of light to moderate loads. The unit is approximately 70 mm wide, designed for compact installation in distribution boards and control panels alongside other SENTRON components. This 5SY4205-7 designation is listed in Siemens catalogs (including variants such as 5SY4205-7KK11) and is widely sold by distributors under the same electrical specifications. With two poles, it interrupts current on both conductors of the protected circuit, providing reliable protection against overloads and short circuits while preserving safe disconnect of the protected load. The 5SY4 family is common in industrial and commercial electrical installations where space is at a premium and reliable overcurrent protection is required.