The ABB AF09Z-40-00-21 is a 4-pole non-reversing contactor, meaning it switches power in one direction only — no built-in reversing interlock. The coil accepts 24-60VAC or 20-60VDC, giving you a wide control-voltage window that covers common 24V and 48V control schemes without a separate coil-change. Four poles handle up to 9A AC-3 duty per pole (standard motor switching), so it fits small three-phase motor loads, resistive heaters, or lighting banks where a compact 4-pole block is needed. This is a DIN-rail mount contactor, sized for a standard 45mm-wide enclosure slot. The 4-pole layout uses the full width; leave 10mm clearance above and below for wiring access.
No minimum-buy restriction typical of obsolete parts.