What this reversing starter packs — and where it fits
The 3RA2220-1BD23-0AP6 is a SIRIUS 3RA2 non-fused reversing motor starter — meaning it combines a reversing contactor pair and a thermal bimetallic overload relay in one assembly that snaps onto a 60 mm busbar system, not a DIN rail. Vertical mounting is specified, so plan the enclosure layout accordingly: the unit is 260 mm tall, 90 mm wide, 155 mm deep. It ships with the contactor 3RT2023-1AP60, the link module 3RA2921-1AA00, and the busbar adapter 8US1251-5NT10 — so the BOM for the reversing function is already integrated. The overload release is thermal bimetallic (Class 10), not electronic — no trip-curve configuration, just the heater element matched to the motor FLA.
Rated power and voltage — what the numbers mean for the motor you're reversing
Rated 690 V maximum in AC-3 duty, the reversing starter delivers 750 W at 400 V (that's 1.63 A at 480 V, 1.72 A at 600 V, 1.1 kW at 690 V). The coil accepts 176–242 V at 50 Hz and 192–264 V at 60 Hz — so a 208–240 V control transformer covers both. The load feeder is size S0; the circuit-breaker size is S00, so if you're adding branch protection upstream, match to that frame.
Clearance and environment — what the panel builder needs to know
Clearance around the unit: 30 mm above, 10 mm forward, 10 mm below, 9 mm at the side, and zero mm behind (it mounts flush to the busbar). That 0 mm back clearance is handy for shallow enclosures — the busbar adapter takes up the depth. Pollution degree 3 means it's rated for conductive pollution in industrial atmospheres; operating temperature range is -20 to +60 °C. Wire range for the main contacts: stranded 1–10 mm², or 2×(2.5–6 mm²) for paralleling. That covers most motor leads up to about 8 AWG. Storage temp goes from -50 to +80 °C; transport from -55 to +80 °C — so it's fine in unheated warehouses or truck beds in winter.