Siemens 5SY4102-8 Molded Case Circuit Breaker

Siemens 5SY4102-8 is a single-pole molded case circuit breaker (MCCB) in the 5SY family, rated for 230/400 V AC with a nominal current of 2 A. It uses a Type D tripping characteristic and delivers up to 10 kA of breaking capacity, enabling safe interruption of fault currents in typical distribution panel applications. The unit is designed for compact installation in Siemens panelboards and ships with an auxiliary contact block (5ST3010-2) that provides one normally open and one normally closed contact for signaling or interlocking when used with compatible devices. This 1P 5SY4102-8 is commonly used to protect small circuits such as lighting, fans, control circuits, or small motor loads in residential, commercial, and light industrial environments, where a compact 2 A protection device and an available auxiliary contact are advantageous. The IP20-rated enclosure and compatibility with the 5SL/5SY/5SP families support straightforward wiring and integration in standard electrical installations.