SENTRON 3VA1110-5FD42-0AA0 — 100 A, 4-Pole MCCB for Line Protection
The Siemens SENTRON 3VA1110-5FD42-0AA0 is a 4-pole molded case circuit breaker rated at 100 A continuous current, configured for line protection with a TM210 thermal-magnetic overcurrent release. It carries a breaking capacity of 187 kA at 240 V, 121 kA at 415 V, 76 kA at 440 V, and 17 kA at both 500 V and 690 V — figures that define its fault-interruption capability at the panel's service voltage. The TM210 release integrates thermal (overload) and magnetic (short-circuit) elements, so no separate relay or CT is needed for basic motor or feeder protection. IP40 on the front keeps dust out of the enclosure face; the breaker is designed for DIN-rail or panel-mount installation inside a switchboard.
Thermal Derating and Operating Range
The 100 A rating holds at ambient temperatures up to 50 °C. Above that, the continuous current derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. For a panel builder or commissioning engineer, this means the breaker's full 100 A capacity is available in a standard 40 °C enclosure; if the panel runs hotter — near a drive bank or transformer — the load must be trimmed to the derated value or the next frame size selected. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C, which governs handling and warehousing, not running conditions.
Dimensions and Panel Fit
The breaker measures 130 mm high, 101.6 mm wide, and 70 mm deep. The 4-pole width (101.6 mm) is the key dimension for panel layout — it occupies the same footprint as other 4-pole 3VA1 frame breakers, so a panel designed for a 3VA1110-5EE32-0JA0 or similar sibling accepts this unit without rewiring or bus-bar repositioning. Depth of 70 mm leaves clearance for rear-connected bus bars or cable ducts in a standard 200 mm deep enclosure.