63 A MCCB with high interrupting capacity for line protection
The Siemens SENTRON 3VA1163-6EF36-0DA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity reaches 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — figures that place it in the high-fault-current tier for industrial distribution panels and motor control centers. The 800 V rated insulation voltage (Ui) supports 690 V line-to-line systems common in European and North American heavy industrial plants. This MCCB is dimensioned at 130 mm height, 76.2 mm width, and 70 mm depth — a 3-pole footprint that fits standard SENTRON panel-mount cutouts. Front-side IP40 protection covers the operator interface; the enclosure itself is rated for panel interior use, not washdown zones.
Thermal derating and operating range
The 63 A rating holds flat from 40 °C through 50 °C. Above that, derating begins: 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. For a panel pulling near the 63 A limit at an ambient above 50 °C, the effective continuous current drops — factor this into load schedules. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Undervoltage release and auxiliary options
This variant includes an undervoltage release (UVR) — the auxiliary release type is designated as 3VA9608-0BB25. The UVR trips the breaker when control voltage drops below a threshold, a standard requirement for safety circuits that need to drop a load on loss of control power. No auxiliary contacts are fitted on this order code; no communication module, no phase-failure detection, no ground-fault monitoring. If remote signaling or status feedback is needed, the auxiliary contact kit is a separate add-on.