3-pole MCCB for line protection — 63 A frame with TM240 release
The Siemens SENTRON 3VA1163-5EF36-0JH0 is a 3-pole molded case circuit breaker (MCCB) built for line protection. It carries a rated continuous current Iu of 63 A and a TM240 thermal-magnetic overcurrent release. The 187 kA interrupting rating at 240 V is the headline number, but what matters for panel coordination is the full voltage curve: 121 kA at 415 V, 75.6 kA at 440 V, and still 17 kA at 690 V — meaning this breaker stays selective downstream across a wide range of fault levels without cascading upstream. The 63 A rating holds flat from 40 °C up to 50 °C, then derates gradually: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. That means in a warm panel near the top of a switchboard, you still get nearly full rated current — no need to oversize the frame for a 50 °C ambient. The operating range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C.
Integration — panel fit and auxiliary wiring
This MCCB measures 76.2 mm wide by 130 mm tall by 70 mm deep — a standard 3-pole SENTRON 3VA frame that fits existing DIN-rail or screw-mounted panel layouts without re-drilling. The front face carries an IP40 protection rating, suitable for enclosed distribution boards where dust ingress is limited. A mechanical trip indicator and a voltage trigger are built in, giving the maintenance tech a clear visual and electrical signal when the breaker has opened on fault. The auxiliary contact block comes configured with 2 auxiliary switches plus 1 trip alarm switch (HQ type). That gives three separate signal paths: two for status feedback (open/closed) and one dedicated to the trip event. The integrated shunt trip release (STL) is designed for remote tripping via a control signal — useful for emergency-stop circuits or supervisory shutdown. No undervoltage release, no ground-fault monitoring, and no communication module on this variant; it's a straightforward line-protection breaker with remote-trip capability.