40 A, 300 mA, type A — what it means for the panel
The 5SV3644-6KK01: The short-time delayed characteristic (0.8 kA per IEC 61008-1) prevents nuisance tripping from transient leakage pulses common on motor-start or capacitor inrush events. Four-pole design (3P+N) covers three-phase systems with neutral — the neutral pole switches and is monitored for residual current. The 10 000 mechanical operating cycles typical service life suits it for distribution panels where switching is infrequent (quarterly test / maintenance cycles), not daily load-break duty.
DIN-rail fit and enclosure integration
Depth is 70 mm, installation depth also 70 mm, so it sits flush with the DIN rail edge; no extra rear clearance needed beyond the rail itself. Height is 90 mm. IP20 with connected conductors — the terminals are finger-safe only when the distribution board is closed; treat it as an enclosed-panel device, not a standalone outdoor unit. Supply can land top or bottom — no mandatory orientation for line/load. The test circuit requires minimum 100 V to operate, so it functions on 230/400 V systems without a separate test supply. Silicon-free construction, overvoltage category III, ambient range -25 °C to +45 °C. Storage range extends to -40 °C.