Siemens 3VA5225-5EC31-0AA0 Air Circuit Breaker

Siemens 3VA5225-5EC31-0AA0 is a three‑pole molded‑case circuit breaker in the SENTRON 3VA5 family, rated for In = 250 A and intended for three‑phase distribution protection. As a UL Frame 250 A device, it provides a 35 kA short‑circuit interrupting capacity at 480 V and ships with a TM230 trip unit featuring FTAM accessories for reliable long‑time and instantaneous protection. The unit offers Ui 800 V insulation voltage and Ue up to 690 V AC (750 V DC), with 3 poles and a mechanically rated life around 20,000 switching cycles. Its short‑circuit protection is Ir = 250 A and fixed short‑circuit protection Ii = 5–10 × In without external connections, and it conforms to HACR‑type usage for heating, air conditioning, and refrigeration circuits. This MCCB is designed for protection of feeders and equipment in industrial and commercial electrical distributions, providing UL 489 compliance and robust 3‑phase protection in a compact UL 250 A frame.