Siemens 3VA2040-5HM46-0AA0 — SENTRON 4-pole MCCB, 40 A, line protection
Its thermal-magnetic trip unit is adjustable from 60 A minimum to 480 A maximum, covering a wide range of feeder and branch-circuit protection needs without changing the breaker frame. Breaking capacity reaches 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — sufficient for high-fault installations downstream of large transformers.
The adjustable trip range (60–480 A) lets a single frame serve multiple load sizes; the 40 A continuous rating is the thermal baseline, while the magnetic pickup is set by the dial (the 60–480 A range covers both thermal and magnetic adjustments). Ground-fault monitoring uses summation current sensing on L + N conductors, so it detects leakage without a separate GFCI module — useful for personnel protection in grounded systems.
