The Siemens SENTRON 3VA1010-4ED36-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuously at 40 °C without derating. The TM210 thermal-magnetic overcurrent release handles overload and short-circuit protection in one package, with an undervoltage release (UVR) built in for coordinated load shedding or emergency stop circuits.
Breaking capacity and selectivity
The interrupting rating hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that govern fault-current coordination downstream. At 690 V it still clears 11.9 kA, so this breaker can sit at the secondary of a 690 V distribution transformer without needing a current-limiting fuse ahead of it. The insulation voltage is rated 800 V, giving headroom for 690 V line-to-line systems.
Thermal derating and panel fit
At 40 °C the breaker carries a full 100 A; at 55 °C it derates to 98 A, at 70 °C to 91 A. That means a panel ambient of 50 °C still allows the full 100 A rating — no upsizing needed for typical enclosed switchgear. The 70 mm depth and 76.2 mm width fit standard Siemens SENTRON mounting footprints, and the 130 mm height leaves clearance for cable entry and busbar connections in a distribution board.
Auxiliary release and monitoring
The undervoltage release (UVR) trips the breaker when control voltage drops below a threshold, which is standard for emergency-off circuits or undervoltage protection on motor feeders. The breaker has no trip indicator, no voltage trigger, and no ground-fault monitoring — the TM210 release handles overcurrent only, so any ground-fault protection must come from an external relay or an upstream RCD.