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11B31000440 – 3P CONTACTOR B310.00 440/480V
Lovato 11B31000440 three-pole industrial contactor with 310A AC3 operational current rating and 440V AC control coil for industrial motor control and automation systems.
Why Choose the LOVATO Electric 11B31000440 Three-Pole Contactor?
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.
Key Advantages
- Heavy-duty three-pole industrial contactor.
- 320 A IEC AC-3 operational current for large motor loads.
- 440–480 V AC/DC control coil for flexible installation.
- Suitable for motors up to 170 kW at 400 V AC-3.
- Long mechanical and electrical service life.
- Fully compliant with IEC, UL and CSA standards.
Key Features
- LOVATO B310 industrial contactor series.
- Three main power poles.
- 320 A AC-3 operational current.
- 450 A AC-1 thermal current (Ith).
- 440–480 V AC/DC coil voltage.
- Screw mounting installation.
- Mirror contacts for enhanced safety.
- EMC compliant construction.
- Mechanical life up to 10 million operations.
Reliable Heavy-Duty Motor 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.
Typical Applications
- Large three-phase motor starters.
- Industrial pumps and compressors.
- Conveyor and material handling systems.
- Process manufacturing equipment.
- Motor control centres (MCCs).
- Power distribution panels.
- Industrial automation systems.
- Heavy-duty machinery and OEM equipment.
Technical Specifications
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| Terminal Type | Bar / bolt | |
|---|---|---|
| Coil Voltage Range | 380–440 V | |
| Power | 160 kW | |
| Current | 310 A | |
| Voltage | 440 V | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Device Type | Contactor | |
| Coil Type | AC | |
| Current AC-1 | 450 A | |
| 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 |
Frequently Asked Questions
What is the LOVATO 11B31000440 used for?
It is designed for switching and controlling high-power three-phase motors and industrial electrical loads in automation and motor control systems.
What is the AC-3 current rating?
The contactor is rated at 320 A AC-3 under IEC standards.
What coil voltage does this model use?
This version is fitted with a 440–480 V AC/DC control coil.
How many poles does the contactor have?
The 11B31000440 is a three-pole contactor intended for three-phase power circuits.
Where is this contactor typically installed?
It is commonly installed in motor control centres, industrial control panels, switchboards and heavy-duty machinery.
Trusted for Heavy Industrial Motor Control
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.
