Siemens SENTRON 3VA1110-5EF32-0KH0 — 100 A MCCB for Line Protection
The Siemens SENTRON 3VA1110-5EF32-0KH0 is a 3-pole molded case circuit breaker rated for 100 A continuous at 40 °C, designed specifically for line protection in distribution panels and switchgear assemblies. Its interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V — giving you serious fault-clearing headroom across common industrial voltage levels. Rated insulation voltage is 800 V, and the breaker carries a shunt trip release (STL) plus two auxiliary switches and one trip alarm switch HQ, so it integrates into safety circuits and remote monitoring schemes without extra hardware.
Thermal Derating and Power Loss
The 100 A rating holds flat from 40 °C through 50 °C, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C — a gentle curve that gives you usable capacity even in a warm enclosure. Maximum power loss is 25 W, which matters for thermal management inside a sealed or high-density panel.
Dimensions and Panel Fit
At 130 mm high, 76.2 mm wide, and 70 mm deep, this MCCB fits standard SENTRON mounting footprints and leaves room for adjacent breakers and wiring gutters in a distribution board. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C, so it handles cold warehouses and hot machine rooms alike.