Line protection MCCB with TM240 release and UVR
The Siemens SENTRON 3VA1163-4EF36-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 63 A. Its TM240 thermal-magnetic overcurrent release handles the overload and short-circuit trip curves, while the integrated undervoltage release (UVR) — designated 3VA9608-0BB24 — drops the breaker when supply voltage falls below the dropout threshold. Breaking capacity hits 121 kA at 240 V and 75.6 kA at 415 V, so it clears high-fault conditions on distribution feeders or large motor branch circuits without cascading upstream.
What the ratings mean for panel fit
At 70 mm deep, 76.2 mm wide, and 130 mm tall, this MCCB fits standard SENTRON mounting footprints. The IP40 front face keeps dust out of the enclosure cutout; the rest of the breaker is rated for the panel interior. Rated insulation voltage Ui is 800 V, so it's fine on 480/277 V or 600 V systems with margin. The 63 A rating holds flat from 40 °C to 50 °C — no derating needed in a typical 40 °C panel — then drops to 60.48 A at 55 °C and 56.7 A at 70 °C. If the panel ambient runs hot, size for the 70 °C number.
Auxiliary contacts and release configuration
Comes with 2 auxiliary switches (HQ type) — enough for a status feedback to the PLC and a remote indication lamp without adding a side-mount block. The undervoltage release is factory-fitted; no field wiring of a separate UVR module. No voltage trigger, no phase failure detection, no communication module, and no ground fault monitoring on this variant — it's a straightforward line-protection breaker, not a power monitoring device. Latching endurance is 15 000 operations, typical for distribution-grade MCCBs.