What this MCCB carries and where it fits
The Siemens 3VA1110-3EF32-0AD0 is a SENTRON molded case circuit breaker (MCCB) rated for line-protection duty — the core job is protecting feeders and downstream distribution from overloads and short circuits. It carries a rated continuous current Iu of 100 A across three poles, with a TM240 thermal-magnetic overcurrent release that provides fixed thermal pickup and magnetic trip for fast fault clearing. Interrupting capacity is specified at multiple system voltages: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. That spread covers common low-voltage distribution levels from North American 240 V delta through European 400/415 V networks up to 690 V industrial supplies. The 75.6 kA figure at 240 V is the headline number — it tells you this breaker can clear a bolted fault on a high-capacity transformer secondary without the arc re-striking. Thermal derating is minimal through 50 °C (still 100 A), then drops to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. For a panel that runs warm — say a packed enclosure with drives — the 90 A floor at 70 °C means you don't oversize the breaker for ambient heat; the 100 A frame handles the same load as a cooler panel would. The enclosure footprint is 70 mm deep, 76.2 mm wide, 130 mm tall — a standard 3-pole MCCB form factor that fits most DIN-rail or panel-mount layouts. IP40 on the front means it's protected against tools and wires >1 mm entering the face, but not sealed against moisture; install it inside a rated enclosure for washdown or outdoor locations.
Auxiliary contacts and release options
This variant ships with three auxiliary switches (HQ type) integrated, providing status feedback for remote monitoring or PLC inputs. It does not include an undervoltage release, a shunt trip (voltage trigger), or a ground-fault monitoring module — those are separate add-on accessories that mount to the breaker's accessory slots. The TM240 release is fixed; no adjustable thermal or magnetic settings are available on this version. No communication module is fitted, so this is a standalone breaker — no remote trip indication or load-shedding via fieldbus. For applications requiring remote control or energy metering, look at the 3VA1 variants with communication options.
Environmental and compliance range
Operating temperature spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running conditions. The rated insulation voltage Ui is 800 V, which covers 690 V systems with margin. The reference code per DIN EN 81346-2 is Q (switching device).