Lovato 11B31000440 three-pole industrial contactor with 310A AC3 operational current rating and 440V AC control coil for industrial motor control and automation systems.
£2,388.79
The LOVATO Electric 11B31000440 is a high-capacity three-pole industrial power contactor designed for switching and controlling large three-phase motors and heavy electrical loads. Part of the robust LOVATO B310 contactor series, it delivers an IEC operational current of 320 A (AC-3), making it ideal for demanding industrial motor control and automation applications.
Featuring a versatile 440–480 V AC/DC control coil, this contactor can be integrated into both AC and DC control systems, simplifying machine design and panel construction. Designed for long electrical and mechanical life, it provides dependable switching performance in continuous industrial operation.
With screw mounting, mirror contacts, EMC compatibility and compliance with IEC, UL and CSA standards, the 11B31000440 is suitable for use in motor control centres, industrial machinery, process plants and heavy-duty automation systems requiring reliable high-current switching.
Industrial contactors are essential components for safely switching three-phase motors and other high-current electrical loads. By energising the control coil, the contactor closes its main contacts, allowing motors to start and stop through PLCs, push buttons, safety relays and automation systems while isolating high-power circuits from the control circuitry.
The LOVATO B310 series is engineered for demanding industrial environments where high reliability, long operating life and consistent switching performance are required. Its high AC-3 rating makes it particularly suitable for large induction motors operating in manufacturing, infrastructure and heavy industrial applications.
| Power | 160 kW |
|---|---|
| Current | 310 A |
| Voltage | 440 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | B310 Contactors |
| Product type | Three-pole industrial contactor |
| Operational current (AC3) | 310 A |
| Operational current (AC1) | approx. 450 A |
| Rated operational power AC3 at 400 V | approx. 160 kW |
| Control coil voltage | 440 V AC 50/60 Hz |
| Number of poles | 3 |
| Contact configuration | 3 NO |
| Type of coil | AC coil |
| Insulation voltage | 1000 V |
| Impulse withstand voltage | 8 kV |
| Mounting type | Screw mounting |
| Terminal type | Bolt connection |
| Protection rating | IP20 |
| Compliance | IEC/EN 60947-1, IEC/EN 60947-4-1, UL, CSA |
It is designed for switching and controlling high-power three-phase motors and industrial electrical loads in automation and motor control systems.
The contactor is rated at 320 A AC-3 under IEC standards.
This version is fitted with a 440–480 V AC/DC control coil.
The 11B31000440 is a three-pole contactor intended for three-phase power circuits.
It is commonly installed in motor control centres, industrial control panels, switchboards and heavy-duty machinery.
LOVATO Electric B310 contactors are trusted by panel builders, OEMs and industrial engineers worldwide for dependable switching performance, long service life and reliable operation in demanding motor control applications.{ "@context": "https://schema.org/", "@type": "Product", "name": "LOVATO Electric 11B31000440 Three-Pole Contactor 320 A", "sku": "11B31000440", "mpn": "11B31000440", "gtin13": "8013975074657", "brand": { "@type": "Brand", "name": "LOVATO Electric" }, "category": "Industrial Contactors", "description": "LOVATO Electric B310 three-pole industrial contactor with 320 A AC-3 rating and 440–480 V AC/DC control coil for heavy-duty motor control applications.", "additionalProperty": [ { "@type": "PropertyValue", "name": "Rated operational current", "value": "320 A AC-3" }, { "@type": "PropertyValue", "name": "Thermal current", "value": "450 A AC-1" }, { "@type": "PropertyValue", "name": "Coil voltage", "value": "440–480 V AC/DC" }, { "@type": "PropertyValue", "name": "Number of poles", "value": "3" }, { "@type": "PropertyValue", "name": "Motor rating", "value": "170 kW at 400 V" } ] } { "@context": "https://schema.org", "@type": "FAQPage", "inLanguage": "en-GB", "mainEntity": [ { "@type": "Question", "name": "What is the LOVATO 11B31000440 used for?", "acceptedAnswer": { "@type": "Answer", "text": "It is designed for switching and controlling high-power three-phase motors and industrial electrical loads in automation and motor control systems." } }, { "@type": "Question", "name": "What is the AC-3 current rating?", "acceptedAnswer": { "@type": "Answer", "text": "The contactor is rated at 320 A AC-3 under IEC standards." } }, { "@type": "Question", "name": "What coil voltage does this model use?", "acceptedAnswer": { "@type": "Answer", "text": "This version is fitted with a 440–480 V AC/DC control coil." } }, { "@type": "Question", "name": "How many poles does the contactor have?", "acceptedAnswer": { "@type": "Answer", "text": "The 11B31000440 is a three-pole contactor intended for three-phase power circuits." } }, { "@type": "Question", "name": "Where is this contactor typically installed?", "acceptedAnswer": { "@type": "Answer", "text": "It is commonly installed in motor control centres, industrial control panels, switchboards and heavy-duty machinery." } } ] }
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...