What this MCCB delivers
The Siemens SENTRON 3VA1010-4ED42-0BA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuously up to 50 °C and derating to 91 A at 70 °C. Its TM210 thermal-magnetic overcurrent release handles overload and short-circuit protection without a communication module or ground-fault monitoring built in. The interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that give selectivity headroom in a main or feeder panel.
Sizing and thermal derating
This MCCB holds its full 100 A rating from 40 °C through 50 °C. Above that, it derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. The maximum power loss is 27.5 W. If the panel ambient runs hot, factor the derating curve into the load schedule — the breaker won't trip prematurely, but the continuous current capability drops.
Interrupting capacity across voltages
The interrupting ratings span the common distribution voltages: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The insulation voltage is rated at 800 V. For a 480 V or 600 V class panel, the 11.9 kA figure at 500 V and 690 V is the limiting value — verify the available fault current at the installation point stays under that ceiling.
Undervoltage release and auxiliary options
This variant includes an undervoltage release (UVR) as the auxiliary release, designed to trip the breaker when supply voltage drops below a threshold — useful for motor protection or to prevent automatic restart after a sag. There is no trip indicator, no voltage-trigger function, and no communication module. The basic switch supplied is 3VA10104ED420AA0. For applications needing remote signaling or energy metering, look at the communication-enabled siblings in the 3VA1 family.