Siemens 5SX4 120-7 Molded Case Circuit Breaker is a single‑pole protective device rated for 20 A at up to 380 VAC, designed for use in low‑voltage distribution panels. Identified by Siemens part number 186127, it belongs to the 5SX4 molded‑case family and provides overcurrent protection for a single conductor in a panel setup. Its molded‑case construction supports straightforward installation in standard distribution boards while delivering clearly labeled voltage and current ratings for safe, reliable performance.
