The Siemens SENTRON 3VA1140-5EF36-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for 40 A continuous at 40 °C, with a TM240 thermal-magnetic overcurrent release and an integrated shunt trip (STL) for remote tripping. It's designed for line protection in distribution panels and switchgear assemblies. The interrupting ratings are substantial: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 187 kA figure at 240 V means it can safely clear a fault current up to that level without rupturing — critical for high-fault-capacity installations like transformer secondaries or large motor control centers. Current-carrying capacity holds steady at 40 A from 40 °C through 50 °C ambient, then derates to 39 A at 55–60 °C, 38 A at 65 °C, and 37 A at 70 °C. The shunt trip release allows a remote signal to open the breaker — useful for emergency stops or interlocked disconnects in automated lines.
Integration & Mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard SENTRON 3VA frame size that fits common panel cutouts and DIN-rail adapter plates. The 3-pole footprint matches existing 3VA family busbar and lug kits.
Approvals & Compliance
As a SENTRON MCCB, this breaker carries IEC 60947-2 certification for low-voltage switchgear. The insulation voltage is rated at 800 V, with an operating temperature range of -25 °C to 70 °C and storage from -40 °C to 80 °C. Maximum power loss is 10.8 W.