Lineup and fit — SENTRON 3VA2 frame
The thermal-magnetic trip unit adjusts from 38 A minimum to 300 A maximum, so this breaker covers motor and feeder circuits where the full-load current falls inside that window. Breaking capacity is 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — the 690 V figure tells you this is not a 690 V main breaker for high-fault installations; it lives in the 240–500 V distribution tier where available fault current is high.
Panel integration — footprint and derating
Footprint is 140 mm wide by 181 mm tall by 86 mm deep — standard for a 4-pole 3VA2 frame. The depth (86 mm) is the dimension that clears the gland plate or rear-panel cover; the width (140 mm) determines DIN-rail or mounting-plate spacing.
Lifecycle status is current production — no phase-out or NRND flag on this order code. That means the BOM line is stable for new builds and spares.
Ground-fault and auxiliary features
This variant includes ground-fault monitoring via summation current formation on L + N conductors — it sums the phase and neutral currents to detect imbalance, so it serves as a combined overcurrent and ground-fault device without a separate GFCI module.