What this SENTRON MCCB delivers in the panel
The Siemens 3VA2140-6JP46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current across a 4-pole configuration, built around the ETU550 electronic trip unit. That trip unit gives you adjustable overload and short-circuit protection curves — not a fixed thermal-magnetic — so you can fine-tune coordination downstream without swapping hardware. The interrupting capacity hits 242 kA at 240 V and still holds 187 kA at 415 V and 440 V, which means it handles high-fault utility feeds or transformer secondaries without cascading failure upstream. Physically it measures 181 mm high by 140 mm wide by 86 mm deep — a standard SENTRON 3VA footprint that drops into existing panel layouts without re-drilling the backplate. The front face carries IP40 protection, acceptable for enclosed switchboards but not for wet washdown zones.
Trip curve and thermal behaviour
The ETU550 electronic trip unit covers an adjustable current range from 60 A minimum to 480 A maximum — that wide band lets you set the breaker to protect a specific load rather than accepting a fixed factory calibration. The continuous current rating holds flat at 40 A from 40 °C all the way up to 70 °C ambient, so you don't lose headroom in a hot switchgear lineup or near a compressor bank. Insulation voltage is rated at 800 V, giving you margin on 690 V systems where the interrupting capacity drops to 3.7 kA — that's the limit to watch if you're feeding a 690 V motor drive.
Communication and integration
This MCCB includes a communication function, meaning it can report status and trip events to a higher-level control system — useful for a cold-storage plant where you want remote indication of a breaker trip in a freezer without sending a technician to the panel. No ground-fault monitoring is built in; that would require a separate module or a different variant.