SENTRON 3VA1112-3EE42-0AA0 — 125 A, 4-Pole MCCB with TM220 Release
The Siemens 3VA1112-3EE42-0AA0 is a SENTRON molded case circuit breaker in the 3VA platform, rated 125 A continuous current (Iu) at 40 °C through 50 °C with no derating needed in that band — above 55 °C it steps down to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C, so a panel running at 60 °C ambient loses only 5 A off the headline number. Four-pole construction (Number Of Poles = 4) with a TM220 thermal-magnetic overcurrent release — the thermal element handles overloads, the magnetic element handles short-circuits. No ground-fault monitoring or N-conductor protection built in; those are external add-ons if the application requires them. Breaking capacity varies by line voltage: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That curve tells you this breaker is sized for high-fault 240 V panels (typical in North American distribution) and still holds a solid 52.5 kA at 415 V — common in European industrial mains. At 690 V the 11.9 kA figure is adequate for most motor-drive branch circuits but verify against your transformer's nameplate fault current. Rated insulation voltage Ui = 800 V, max operational voltage with DC = 600 V. Power loss at full load is 28.1 W maximum — factor that into enclosure thermal calculations if you're packing several breakers in a closed panel.
Footprint and Panel Fit
Dimensions: 130 mm height, 101.6 mm width, 70 mm depth. The 70 mm depth is the key number for enclosure depth clearance — standard 200 mm deep enclosures clear it easily, but shallow 120 mm backboxes may need a spacer or a different breaker. Width of 101.6 mm (4 in) fits a standard 4-pole MCCB footprint on DIN rail or panel-mount base. Front IP40 protection — fine for a dry indoor panel; not rated for washdown or outdoor exposure. Storage temperature range -40 °C to 80 °C, operating range -25 °C to 70 °C.
Lifecycle and Sourcing
Motor drive option is available as a product extension (Product Extension / Optional / Motor Drive = Yes), meaning the breaker accepts a remote motor operator for electrical trip-and-close control — useful for remote or automated panel applications.