Siemens 3VA1132-5EF46-0AA0 — 32 A 4-Pole MCCB for Line Protection
The Siemens 3VA1132-5EF46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current rating of 32 A across the 40 °C to 50 °C range and derating to 30 A at 70 °C. Four-pole construction with a TM240 thermal-magnetic overcurrent release, no ground-fault monitoring, and no N-conductor protection — a straightforward line-protection MCCB sized for 32 A continuous duty. Short-circuit breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V, dropping to 17 kA at 500 V and 690 V — the high 240 V figure tells you this was designed for the North American 240 V split-phase market or high-fault 277/480 V sub-distribution where the 121 kA at 415 V covers IEC 50/60 Hz installations.
Fit, Mounting, and Panel Integration
Rated insulation voltage Ui of 800 V and a maximum operating voltage of 600 V DC — suitable for DC distribution in solar or battery-storage combiner boxes, though the short-circuit design note references the 3VA device manual for DC switching specifics. IP40 protection on the front face — fine for a clean indoor panel; not rated for washdown or outdoor exposure without an additional enclosure.
Lifecycle and Sourcing
Power loss at rated load is 10.6 W maximum — negligible for thermal budgeting in a populated panel, but worth noting if the breaker is enclosed in a non-ventilated sub-panel with other heat sources.