Siemens SENTRON 3VA1150-6ED36-0AA0 — 50 A MCCB, 500 A Frame, TM210 Release
The Siemens SENTRON 3VA1150-6ED36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 50 A continuous current on a 500 A frame, with a TM210 thermal-magnetic overcurrent release. It delivers a 220 kA interrupting capacity at 240 V AC, stepping down to 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That spread tells you this breaker is built for high-fault locations near the service entrance or large transformers — the 240 V rating alone handles 220 kA of prospective short-circuit current.
Thermal Derating and Ambient Heat — What 70 °C Means on a Mill Floor
Rated 50 A all the way from 40 °C to 50 °C ambient, then it starts to pull back: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. For a hot-strip mill panel sitting near the runout table or furnace zone, that 70 °C ceiling with only 10 % derating (45 A vs 50 A) means this MCCB holds its strip without nuisance tripping when the ambient climbs. The maximum power loss is 14.6 W — manageable heat to vent through the enclosure, but worth factoring into the panel thermal budget if you're stacking several breakers.
Panel Fit — Dimensions and Integration
Measures 76.2 mm wide (3 in), 130 mm tall (5.12 in), and 70 mm deep (2.76 in). That 76.2 mm width is the standard 3-pole MCCB footprint for a 500 A frame — drops into the same DIN-rail or panel-mount cutout as other SENTRON 3VA frame breakers. No undervoltage release, no voltage trip, no communication module on this variant; it's a straight line-protection device with the TM210 release. The 800 V rated insulation voltage covers 480 V and 600 V class systems with headroom.