What this 3VA1040-4ED32-0HA0 is and what it does
The Siemens 3VA1040-4ED32-0HA0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection, meaning it guards feeders and branch circuits against overloads and short circuits — not motor or generator protection. Rated continuous current Iu is 40 A, and it holds that rating across ambient temperatures from 40 °C to 50 °C without derating; above 50 °C it steps down gradually to 36 A at 70 °C. Interrupting capacity is substantial: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — high enough for most industrial distribution panels with large upstream transformers. The overcurrent release is a TM210 thermal-magnetic type — fixed thermal and magnetic trip settings, no electronic adjustment. That keeps it simple and reliable for standard feeder protection but means you cannot dial in custom curves.
Physical fit and panel integration
Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm high — a compact 3-pole MCCB that fits standard distribution panelboards and enclosure cutouts. Front protection is IP40, suitable for dry indoor environments. Rated insulation voltage Ui is 800 V, so it can be applied in 690 V systems without derating the insulation path.
Auxiliary and release options — what is and isn't included
This variant includes a shunt trip (STL) for remote tripping, with the integrated auxiliary trip order code 3VA9688-0BL30. It does not include an undervoltage release, auxiliary contacts, communication function, phase failure detection, or ground fault monitoring. No trip indicator on the front. Latching endurance is 15,000 cycles.
Environmental limits and DC application note
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. For DC switching applications, Siemens directs you to the 3VA molded case circuit breaker device manual for specific ratings — not covered in this order code's standard spec table.