The Siemens SENTRON 3VA1112-3ED36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 125 A continuously at 40 °C with no derating needed up to 50 °C — it holds 125 A all the way to that point, then tapers to 114 A at 70 °C. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V, so it handles high-fault utility feeds and transformer-secondaries common in North American and European industrial panels. The TM210 thermal-magnetic trip unit gives fixed thermal and magnetic settings — no adjustment dials, which means fewer setup errors on the line but also no field tweaking if the load changes.
Breaking capacity and selectivity
At 240 V the 75.6 kA interrupting rating puts this MCCB well above typical service-entrance fault levels for most industrial and commercial panels — you get full selectivity with upstream fuses or a larger-frame SENTRON without worrying about cascade failure. At 415 V the 52.5 kA still covers heavy industrial transformer feeds; at 690 V the 11.9 kA rating is adequate for downstream sub-distribution but not for main incomer duty on a high-power VFD bus. The rated insulation voltage of 800 V means the internal clearances and creepage are designed for 690 V systems with margin.
Thermal performance and power loss
Maximum power loss is 28.1 W at full rated load — that is the heat you need to vent inside the enclosure. The breaker is rated for continuous operation from -25 °C to 70 °C ambient, with storage range from -40 °C to 80 °C. The IP40 front protection means it is splash-safe from the front but not sealed against hose-down; mount it in a panel with proper gasketing if the environment is wet.
Dimensions and panel fit
At 130 mm high, 76.2 mm wide, and 70 mm deep, this breaker fits the standard 3-pole SENTRON 3VA footprint. No undervoltage release, no shunt trip, no communication module — it is a straight thermal-magnetic line-protection device. The TM210 trip unit is fixed; if you need adjustable thermal or magnetic pickup later, you are looking at a different variant (the 3VA1112-5EE32-0AA0, for instance, carries an electronic trip unit).