Lovato 11B400400110 four-pole industrial contactor with 550A AC1 thermal current rating, 420A AC3 operational current and 110…125V AC/DC universal control coil for industrial automation and motor control systems.
£3,679.49
The LOVATO Electric 11B400400110 is a heavy-duty four-pole industrial power contactor designed for dependable switching of high-current electrical loads. As part of the robust LOVATO B400 contactor series, it provides an IEC conventional free-air thermal current rating of 550 A in AC-1 duty, making it suitable for demanding power distribution, heating, lighting and industrial automation applications.
This contactor features a versatile 110–125 V AC/DC control coil, enabling operation from compatible alternating-current or direct-current control supplies. Its four-pole configuration allows four conductors to be switched simultaneously, making it especially useful in three-phase systems requiring neutral switching or complete multipole circuit isolation.
With an operational current rating of 420 A in AC-3 duty, a rated insulation voltage of 1000 V and robust screw-mounted construction, the 11B400400110 is engineered for reliable operation in industrial switchboards, motor control centres, production machinery and power-management systems.
Four-pole contactors use a low-power control signal to switch four high-current conductors simultaneously. When the control coil is energised, all four main contacts operate together, enabling reliable remote control through PLCs, relays, timers, pushbuttons and industrial automation systems.
The LOVATO Electric 11B400400110 is particularly suitable for AC-1 applications involving resistive or slightly inductive loads, including industrial heating, lighting and power-distribution circuits. Its high AC-3 current rating also supports demanding three-phase motor-control applications.
| Power | 225 kW |
|---|---|
| Current | 420 A |
| Voltage | 125 V |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | B400 Contactors |
| Product type | Four-pole industrial contactor |
| Number of poles | 4 |
| Contact configuration | 4 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 | 110...125 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. 11.26 kg |
| Dimensions | approx. 208 × 196 × 227 mm |
| EAN | 8013975026700 |
| 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 high-current four-pole electrical circuits in industrial heating, lighting, power distribution, motor control and automation systems.
The 11B400400110 has a conventional free-air thermal current rating of 550 A in AC-1 duty at 40 °C.
This model is equipped with a 110–125 V AC/DC control coil, allowing operation from a compatible AC or DC control supply.
The LOVATO 11B400400110 has four main power poles, allowing four conductors to be switched simultaneously.
The contactor has an IEC operational current rating of 420 A in AC-3 duty at voltages up to 440 V.
LOVATO Electric B400 contactors provide the high-current switching capacity, durable construction and control flexibility required by industrial panel builders, OEM manufacturers and automation engineers.{ "@context": "https://schema.org/", "@type": "Product", "name": "LOVATO Electric 11B400400110 Four-Pole Contactor 550 A 110–125 V AC/DC", "sku": "11B400400110", "mpn": "11B400400110", "brand": { "@type": "Brand", "name": "LOVATO Electric" }, "category": "Industrial Contactors", "description": "LOVATO Electric 11B400400110 B400 four-pole industrial power contactor with a 550 A AC-1 thermal current rating, 420 A AC-3 operational rating and 110–125 V AC/DC control coil.", "additionalProperty": [ { "@type": "PropertyValue", "name": "Number of poles", "value": "4" }, { "@type": "PropertyValue", "name": "Main contact configuration", "value": "4 normally open" }, { "@type": "PropertyValue", "name": "Conventional thermal current", "value": "550 A AC-1" }, { "@type": "PropertyValue", "name": "Operational current", "value": "420 A AC-3" }, { "@type": "PropertyValue", "name": "Coil voltage", "value": "110–125 V AC/DC" }, { "@type": "PropertyValue", "name": "Rated insulation voltage", "value": "1000 V" }, { "@type": "PropertyValue", "name": "Impulse withstand voltage", "value": "8 kV" }, { "@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 11B400400110 used for?", "acceptedAnswer": { "@type": "Answer", "text": "It is used to switch high-current four-pole electrical circuits in industrial heating, lighting, power distribution, motor control and automation systems." } }, { "@type": "Question", "name": "What is the AC-1 current rating of this contactor?", "acceptedAnswer": { "@type": "Answer", "text": "The 11B400400110 has a conventional free-air thermal current rating of 550 A in AC-1 duty at 40 °C." } }, { "@type": "Question", "name": "What control voltage does the coil require?", "acceptedAnswer": { "@type": "Answer", "text": "This model is equipped with a 110–125 V AC/DC control coil, allowing operation from a compatible AC or DC control supply." } }, { "@type": "Question", "name": "How many poles does this contactor have?", "acceptedAnswer": { "@type": "Answer", "text": "The LOVATO 11B400400110 has four main power poles, allowing four conductors to be switched simultaneously." } }, { "@type": "Question", "name": "What is the AC-3 current rating of this contactor?", "acceptedAnswer": { "@type": "Answer", "text": "The contactor has an IEC operational current rating of 420 A in AC-3 duty at voltages up to 440 V." } } ] }
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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...