Siemens 3VA1140-4GE42-0AA0 — 40 A SENTRON MCCB, Line Protection, Active Production
The Siemens 3VA1140-4GE42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated at 40 A continuous, configured as a 4-pole unit with a TM220 thermal-magnetic overcurrent release, designed for line protection in distribution panels. Its breaking capacity reaches 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — figures that govern fault-clearing capability at the point of installation. The breaker carries a 40 A rating across ambient temperatures from 40 °C through 50 °C, then derates to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C — useful for panels with elevated internal heat rise.
Integration & Mounting
The 3VA1140-4GE42-0AA0 measures 70 mm deep, 101.6 mm wide, and 130 mm high — a footprint that fits standard Siemens 3VA panel-mounting and busbar systems. Front-face protection is IP40, suitable for enclosed distribution boards where drip or tool entry is not a concern. Rated insulation voltage is 800 V, and maximum power loss at rated current is 10.8 W — a figure to consider for thermal coordination inside a sealed enclosure.
Coordination & Selectivity Notes
The TM220 release provides fixed thermal and magnetic trip settings; no undervoltage release, shunt trip, or communication module is fitted on this variant. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.