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B6-40-00

The ABB B6‑40‑00 is a compact 4‑pole miniature contactor from ABB’s B‑series, designed for control and switching of single‑phase or three‑phase AC loads where space is limited. As a mini‑contactor, it combines a small footprint with sufficient capability for many low to medium‑power applications such as lighting circuits, heating, small motors, pumps, HVAC systems, or other general-purpose loads. Its 4 main poles (4 NO contacts) support switching of all phases (and neutral if needed), making it versatile for different wiring schemes. B6‑40‑00 features a relatively low‑consumption coil, silent (hum‑free) operation, and offers a variety of connection types (screw terminals, flat pins, solder pins) depending on variant — making it suitable for panel or DIN‑rail mounting, installation in compact control cabinets, or retrofit in existing systems.

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Technical Specifications Parameter Value / Description Contactor Type Miniature 4‑pole contactor (mini contactor) Main Contacts 4 × Normally‑Open (NO) Auxiliary Contacts None (standard model) Rated Main‑Circuit Voltage (Ue) Up to 690 V AC (main circuit) Rated Insulation Voltage (Ui) 690 V AC (accord. to IEC); 600 V AC per UL/CSA when applicable Impulse Withstand Voltage (Uimp) 6 kV (main circuit) Rated Operational Current — AC‑1 (Ie, resistive / general load) 20 A @ 220–240 V AC (ambient 40 °C) 16 A @ same voltage (ambient 55 °C) 20 A @ 380–440 V AC (40 °C) 16 A @ 380–440 V AC (55 °C) 6 A @ 690 V AC (both 40 °C & 55 °C) Rated Motor / Inductive Load — AC‑3 (Ie / Power capability) Up to: ~ 2.2 kW @ 230 V AC (three‑phase) ~ 4.0 kW @ 400 V AC (three‑phase) ~ 4.0 kW @ 500 V AC ~ 3.0 kW @ 690 V AC (three‑phase) Short‑time Withstand Current (Icw) 64 A for 10 seconds (cold start, free air, 40 °C ambient) Conventional Free‑air Thermal Current (Ith) 20 A Control Coil / Coil Type / Rated Coil Voltage (Uc) AC‑operated coil; typical coil‑voltage variants depend on version (e.g. 220–240 V AC, 24 V AC, etc.), designed per IEC 60947‑4‑1 Coil Operating Limits 0.85 … 1.1 × Uc (for ambient ≤ 55 °C) Terminal / Connection Types Screw‑terminal, flat‑pin, or solder‑pin options depending on variant; suitable for small to moderate conductor cross‑section Mounting / Installation Wall/panel mounting or DIN‑rail mounting (e.g. TH35) — compact design for limited‑space cabinet or panel installations Mechanical / Electrical Durability Mechanical life up to 10,000,000 switching cycles; suitable for frequent switching in control or automation environments Typical Use Cases Lighting and heating circuits, small motor loads (pumps, fans), HVAC systems, small industrial machines, general-purpose AC loads in control panels or buildings, retrofit or new installations when compact size is needed