Line protection MCCB with TM220 release
Its TM220 thermal-magnetic overcurrent release combines a thermal bimetal for overloads and a magnetic coil for short circuits, giving you a fixed-trip breaker that needs no adjustment in the field. The 400 A frame means the same physical breaker shell can be fitted with lower-rated trip units across the family, but this variant ships with the 40 A TM220 already installed. Interrupting capacity reaches 187 kA at 240 V AC and 121 kA at 415 V AC, dropping to 17 kA at 500 V AC.
The 3VM1140-5EE42-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep. If you need remote tripping or status feedback, you'll add accessories externally or step to a 3VA series variant that supports those options.
This part carries a current lifecycle stage — meaning Siemens still lists it as an active catalog number with no announced end-of-life. No successor has been published, so the 3VM1140-5EE42-0AA0 remains the direct order code for this rating and release combination.