Siemens SENTRON 3VA1112-3EF42-0AA0 — 125 A MCCB, 4-Pole, Line Protection
Breaking capacity reaches 75.6 kA at 240 V AC, 52.5 kA at 415 V, and 32 kA at 440 V — sufficient for high-fault-current installations common in North American and European industrial networks. The breaker lacks a trip indicator, undervoltage release, and communication functions; it is a basic thermal-magnetic MCCB without accessories or remote monitoring.
Dimensions & Panel Fit
The 4-pole width (101.6 mm) matches the standard 4-module footprint for SENTRON 3VA MCCBs, so it drops into existing panel cutouts or DIN-rail adapters without rework. Depth of 70 mm leaves clearance for rear-mounted busbars or cable ducts.
Thermal Derating & Operating Range
Rated current holds at 125 A from 40 °C up to 50 °C, then derates linearly to 114 A at 70 °C. Maximum power loss is 28.1 W at rated load — a modest figure that simplifies thermal management inside the enclosure.