What it is and what the ratings mean
The Siemens SENTRON 3VA2110-7MS36-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 100 A at ambient temperatures up to 50 °C, with no derating needed in that range. Above 50 °C it steps down: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C — so if your panel runs hot, the 100 A frame still carries 90 A at the top of its operating range. The interrupting ratings are the headline here: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. That 330 kA at 240 V means it can safely clear a fault current up to 330 kA without welding contacts or venting plasma — critical for high-capacity transformer secondaries or busway taps where fault current can hit those levels. The 52.5 kA at 690 V still covers most industrial 690 V distribution. This is the starter protection version, designed to sit ahead of a motor starter. The ETU310M electronic overcurrent release handles coordination, and the integrated undervoltage release drops the breaker on loss of control voltage.
Panel fit and integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. The 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size. No auxiliary contacts fitted from the factory (auxiliary contact version: without), and no communication function or phase failure detection. If you need remote status or phase-loss tripping, you'll add the external auxiliary trip (3VA9608-0BB11) or a separate monitoring relay. The basic switch assembly is order code 3VA2110-7MS36-0AA0 — the same breaker minus the UVR coil.
What it does not do
No trip indicator, no voltage-trigger function, no ground-fault monitoring built in. Latching endurance is rated at 20,000 operations. Maximum power loss is 75 W.