The Siemens SENTRON 3VA2140-5JP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 40 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The ETU550 electronic trip unit manages overload and short-circuit curves, and the breaker communicates via an integrated communication function, so it reports status and trip events back to a PLC or BMS without an add-on module.
At 415 V and 440 V the breaker still clears 121 kA — that covers most industrial distribution panels fed from a 500 kVA to 2 MVA transformer where the prospective fault current at the main switchboard lands in the 50–100 kA range. At 500 V it drops to 75.6 kA, and at 690 V it falls to 3.7 kA, so for 690 V drives or mining gear the breaker is only suitable downstream of a current-limiting device.
The front protection is IP40.