Lovato 11B40000440 three-pole industrial contactor with 420A AC3 operational current rating, 550A AC1 thermal current rating and 440…480V AC/DC universal control coil for industrial motor control systems.
£2,924.73
The LOVATO Electric 11B40000440 is a heavy-duty three-pole industrial power contactor designed for reliable switching and control of large three-phase motors and high-current electrical loads. As part of the robust LOVATO B400 contactor series, it provides an IEC operational current rating of 420 A in AC-3 duty, making it suitable for demanding industrial motor-control and automation applications.
This contactor features a versatile 440–480 V AC/DC control coil, enabling operation from compatible alternating-current or direct-current control supplies. Its high switching capacity, durable construction and secure screw-mounted design support dependable use in motor control centres, switchboards, production machinery and process-control installations.
With a conventional free-air thermal current rating of 550 A in AC-1 duty and a motor rating of approximately 225 kW at 400 V AC-3, the 11B40000440 is engineered for applications requiring consistent high-power switching. Compliance with recognised IEC, UL and CSA standards further supports its use in industrial electrical systems and OEM machinery.
Industrial contactors allow a low-power electrical control signal to switch high-current motor and power circuits. When the contactor coil is energised, the three main contacts close simultaneously, supplying power to the connected three-phase load. This enables safe remote operation through PLCs, pushbuttons, control relays and automated machine-control systems.
The LOVATO Electric B400 series is designed for demanding industrial installations where high current capacity and dependable switching performance are essential. The 11B40000440 combines a 420 A AC-3 rating with a 440–480 V AC/DC coil, providing a practical solution for large motors, industrial machinery and process equipment.
| Power | 225 kW |
|---|---|
| Current | 420 A |
| Voltage | 480 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | B400 Contactors |
| Product type | Three-pole industrial contactor |
| Number of poles | 3 |
| Contact configuration | 3 NO |
| IEC thermal current Ith (AC1) | 550 A |
| Operational current AC3 at 400 V | 420 A |
| Rated operational power AC3 at 400 V | 225 kW |
| UL/CSA horsepower rating at 480 V | 350 HP |
| Control coil voltage | 440...480 V AC/DC |
| Type of coil | AC/DC universal coil |
| Rated insulation voltage | 690 V |
| Impulse withstand voltage | 8 kV |
| Supply frequency | 50/60 Hz |
| Mounting type | Screw mounting |
| Terminal type | Bolt connection |
| Protection rating | IP20 |
| Operating temperature | -50 °C to +70 °C |
| Weight | approx. 9.45 kg |
| Dimensions | approx. 208 × 148 × 232 mm |
| EAN | 8013975026649 |
| HS code | 85365080 |
| Compliance | IEC/EN 60947-1, IEC/EN 60947-4-1, UL 60947-1, UL 60947-4-1, CSA C22.2 n° 60947-1, CSA C22.2 n° 60947-4-1 |
It is used to switch and control large three-phase motors and other high-current electrical loads in industrial automation, machinery and motor-control systems.
The 11B40000440 has an IEC operational current rating of 420 A in AC-3 duty.
This model is equipped with a 440–480 V AC/DC control coil, allowing it to operate with a compatible AC or DC control supply.
The contactor is rated for motors up to approximately 225 kW at 400 V in AC-3 duty.
It is commonly installed in motor control centres, industrial switchboards, electrical control panels and heavy-duty production machinery.
LOVATO Electric B400 contactors provide the high-current capacity, durable construction and control flexibility required by panel builders, OEM manufacturers and industrial automation engineers.{ "@context": "https://schema.org/", "@type": "Product", "name": "LOVATO Electric 11B40000440 Three-Pole Contactor 420 A 440–480 V AC/DC", "sku": "11B40000440", "mpn": "11B40000440", "gtin13": "8013975026649", "brand": { "@type": "Brand", "name": "LOVATO Electric" }, "category": "Industrial Contactors", "description": "LOVATO Electric 11B40000440 B400 three-pole industrial power contactor with a 420 A IEC AC-3 operational current rating, 550 A AC-1 thermal current rating and 440–480 V AC/DC control coil.", "additionalProperty": [ { "@type": "PropertyValue", "name": "Number of poles", "value": "3" }, { "@type": "PropertyValue", "name": "Rated operational current", "value": "420 A AC-3" }, { "@type": "PropertyValue", "name": "Conventional thermal current", "value": "550 A AC-1" }, { "@type": "PropertyValue", "name": "Coil voltage", "value": "440–480 V AC/DC" }, { "@type": "PropertyValue", "name": "Motor rating at 400 V", "value": "225 kW" }, { "@type": "PropertyValue", "name": "Rated insulation voltage", "value": "1000 V" }, { "@type": "PropertyValue", "name": "Mounting type", "value": "Screw mounting" }, { "@type": "PropertyValue", "name": "Catalogue status", "value": "Out of catalogue" } ] } { "@context": "https://schema.org", "@type": "FAQPage", "inLanguage": "en-GB", "mainEntity": [ { "@type": "Question", "name": "What is the LOVATO Electric 11B40000440 used for?", "acceptedAnswer": { "@type": "Answer", "text": "It is used to switch and control large three-phase motors and other high-current electrical loads in industrial automation, machinery and motor-control systems." } }, { "@type": "Question", "name": "What is the AC-3 current rating of this contactor?", "acceptedAnswer": { "@type": "Answer", "text": "The 11B40000440 has an IEC operational current rating of 420 A in AC-3 duty." } }, { "@type": "Question", "name": "What control voltage does the coil require?", "acceptedAnswer": { "@type": "Answer", "text": "This model is equipped with a 440–480 V AC/DC control coil, allowing it to operate with a compatible AC or DC control supply." } }, { "@type": "Question", "name": "What motor power can the contactor control?", "acceptedAnswer": { "@type": "Answer", "text": "The contactor is rated for motors up to approximately 225 kW at 400 V in AC-3 duty." } }, { "@type": "Question", "name": "Where is the LOVATO 11B40000440 typically installed?", "acceptedAnswer": { "@type": "Answer", "text": "It is commonly installed in motor control centres, industrial switchboards, electrical control panels and heavy-duty production machinery." } } ] }
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...