Siemens SENTRON 3VA1132-6ED36-0AH0 — 200 A MCCB, Starter Protection Version
The Siemens 3VA1132-6ED36-0AH0 is a SENTRON molded case circuit breaker (MCCB) in the starter protection version, rated for 200 A continuous current (Iu) with a TM120M thermal-magnetic overcurrent release. It carries a 220 kA breaking capacity at 240 V, 154 kA at 415 V, 76 kA at 440 V, 30 kA at 500 V, and 3 kA at 690 V — per the datasheet, these are the short-circuit current ratings the device can safely interrupt at each voltage level. The 3-pole unit includes 2 auxiliary switches plus 1 trip alarm switch (HQ version) and a trip indicator. The 220 kA at 240 V rating means this MCCB can safely clear a fault up to that prospective short-circuit current without rupturing or welding contacts — critical for high-fault-capacity installations like transformer secondaries or large motor control centers where upstream fault levels are substantial. The TM120M release provides thermal protection for overloads and magnetic (instantaneous) protection for short circuits, with the thermal curve calibrated for motor starting inrush.
Thermal Derating and Operating Range
The 200 A continuous rating holds flat from 40 °C through 50 °C ambient. Above that, derating applies: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. The operating ambient range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. For a panel builder, this means the breaker can be mounted in a warm enclosure without losing capacity up to 50 °C — above that, the load must be reduced per the curve.
Motor Switching Duty (AC-3)
Rated for AC-3 motor switching duty: 55 kW at 230 V and 110 kW at 400 V. This is the power it can switch under the IEC AC-3 utilization category — starting and stopping squirrel-cage motors during running, not just isolating. The 110 kW at 400 V figure is the one most site electrical engineers will verify against their motor nameplate.