What this MCCB carries and where it fits
The Siemens 3VA1110-4FD46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current with a 4-pole configuration, built for line-protection duty. The TM210 thermal-magnetic release handles overload and short-circuit response without external control wiring — a straightforward fit for distribution panels where you need selectivity downstream of a transformer or upstream of branch feeders. Breaking capacity varies sharply with system voltage: 121 kA at 240 V, 76 kA at 415 V, 53 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA figure at 240 V tells you this breaker is sized for high-fault locations — close to a transformer secondary or a bus tie where available fault current is substantial. At 690 V the 11.9 kA rating still covers most industrial motor-control-center applications. Current derating is minimal up to 50 °C — the breaker holds 100 A flat. At 55 °C it drops to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If the panel ambient runs above 50 °C, size the upstream conductor for the derated value, not the nameplate 100 A. Mechanical endurance is rated at 20,000 operations — typical for a fixed-mounted MCCB in a distribution board that sees infrequent switching. The front face carries IP40 protection, meaning tools or fingers won't reach live parts, but the breaker is not sealed against water ingress; mount it inside a rated enclosure.
Panel integration and compliance
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a standard 4-pole SENTRON 3VA footprint that mounts on a DIN rail or directly to a backplate via the screw terminals. The 70 mm depth is shallow enough for most 200 mm deep enclosures; verify clearance for outgoing cable bends. Rated insulation voltage Ui is 800 V, and the maximum rated operational voltage with DC is 600 V. The N-conductor protection is set at 50% of the phase rating — standard for a 4-pole breaker in a TN or TT system where the neutral is not fully rated. The overcurrent release is a TM210 thermal-magnetic type, no electronic trip unit, no communication function. Storage temperature range is -40 °C to 80 °C; operating range is -40 °C to 70 °C. Maximum power loss is 25 W — factor that into enclosure thermal calculations if the breaker is in a sealed cabinet with other heat sources.