What this MCCB is and what it does
The Siemens 3VA1010-4ED36-0HH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in industrial distribution panels. Rated 100 A continuously at 40 °C ambient, it carries a 3-pole construction and delivers a breaking capacity of 121 kA at 240 V AC — enough to handle high-fault-current points like main feeders or large motor branch circuits. Its 800 V rated insulation voltage gives headroom for 480 V and 600 V class systems without derating the dielectric.
Breaking capacity — what the numbers mean for your panel
The interrupting ratings span your common industrial 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 (–). That 75.6 kA at 415 V is the figure most relevant for 400 V class three-phase panels in European and Asian plants — it tells you this MCCB can clear a bolted fault without upstream fuses needing to blow first, which keeps selectivity intact. The 11.9 kA at 690 V is lower but still covers the typical SCCR for 690 V motor drives and transformers.
Thermal performance and derating
The 100 A rating holds flat from 40 °C through 50 °C (–). At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A (–). That means in a sealed, uncooled enclosure next to heat-generating contactors or drives, you still have 91 A available at the maximum operating temperature of 70 °C. Maximum power loss is 25 W — moderate for a 100 A frame, so ventilation slots in the enclosure cover should be adequate.
Panel fit and auxiliaries
The 3VA1010-4ED36-0HH0 measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount backplates without requiring a sub-panel. It ships with 2 auxiliary switches plus 1 trip alarm switch HQ, and includes a shunt trip (STL) release for remote tripping via a PLC or E-stop circuit. There is no undervoltage release and no ground-fault monitoring on this variant — if you need those, look at the 3VA1 family with the UG or GF option codes.