What this 100 A MCCB delivers on the line
The Siemens SENTRON 3VA1010-4ED32-0JA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current (Iu) at 40 °C through 50 °C, with a TM210 thermal-magnetic overcurrent release. Its interrupting capacity reaches 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — figures that govern selectivity coordination downstream. The integrated shunt trip (STL) release (order code 3VA9688-0BL32 for the auxiliary trip unit) allows remote tripping via a control signal, so this breaker fits into a safety circuit that needs a hard-wired trip path independent of the overcurrent protection.
Sizing and thermal derating for panel builders
Rated continuous current holds at 100 A from 40 °C up to 50 °C ambient. Above that, derate linearly: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, 90 A at 70 °C. The TM210 release is fixed thermal-magnetic — no electronic adjustment, so the trip curve is set at the factory. Panel builders should confirm the 70 mm depth, 76.2 mm width, and 130 mm height clear the enclosure door and adjacent devices; IP40 on the front face means the breaker is protected against tools and solid objects larger than 1 mm, but not against water ingress — keep it inside a rated enclosure.
Key ratings at a glance
Rated insulation voltage Ui is 800 V. Mechanical endurance is rated at 15 000 cycles (latching endurance). The breaker includes a voltage trip trigger but no undervoltage release, no auxiliary contact version, no communication function, no phase failure detection, and no ground fault monitoring. Storage temperature range is -40 °C to 80 °C; operating ambient is -25 °C to 70 °C. Reference code per DIN EN 81346-2 is Q.