Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
11B31040048 – 4P CONTACTOR B310. 4 00 48V
Lovato 11B31040048 four-pole industrial contactor with 450A AC1 thermal current rating, 320A AC3 operational current and 48V AC/DC universal control coil for industrial automation and motor control systems.
Why Choose the LOVATO Electric 11B31040048 Four-Pole Contactor?
The LOVATO Electric 11B31040048 is a heavy-duty four-pole industrial power contactor designed for reliable switching of high-current electrical loads. As part of the robust LOVATO B310 contactor series, it provides a conventional free-air thermal current rating of 450 A in AC-1 duty, making it suitable for demanding power distribution, heating, lighting and industrial automation applications.
This contactor features a versatile 48 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 particularly useful in three-phase systems requiring neutral switching or complete multipole circuit isolation.
With an operational current rating of 320 A in AC-3 duty and a motor rating of up to 170 kW at 400 V, the 11B31040048 delivers the capacity required for large motors and industrial power circuits. Its high insulation rating, secure screw mounting and compliance with international standards support dependable installation in switchboards, motor control centres and heavy-duty machinery.
Key Advantages
- Heavy-duty four-pole contactor for industrial power switching.
- 450 A conventional thermal current rating in AC-1 duty.
- 320 A operational current rating in AC-3 duty.
- 48 V AC/DC control coil for flexible control-system integration.
- Suitable for motors up to 170 kW at 400 V AC-3.
- Four-pole configuration supports neutral and multipole circuit switching.
Key Features
- LOVATO Electric B310 power contactor series.
- Four main power poles.
- 450 A conventional free-air thermal current.
- 320 A AC-3 operational current at up to 440 V.
- 48 V AC/DC control coil.
- 170 kW motor rating at 400 V AC-3.
- 1000 V rated insulation voltage.
- Screw mounting for secure industrial installation.
Reliable Four-Pole Power Switching
Four-pole contactors allow four high-current conductors to be switched simultaneously using a low-power electrical control signal. When the control coil is energised, the main contacts operate together, enabling remote control through PLCs, relays, timers, pushbuttons and automated industrial control systems.
The LOVATO Electric 11B31040048 is particularly suitable for AC-1 applications involving resistive or slightly inductive loads, including electric heating, lighting and power-distribution circuits. Its AC-3 rating also supports the control of large three-phase motors in industrial machinery and automated production equipment.
Typical Applications
- Industrial heating and resistive load control.
- Four-wire three-phase electrical systems.
- Neutral conductor switching.
- Large three-phase motor starters.
- Industrial lighting installations.
- Power distribution and transfer panels.
- Motor control centres and switchboards.
- Heavy-duty OEM machinery and automation systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Terminal Type | Bar / bolt | |
|---|---|---|
| Coil Type | AC, AC/DC, DC | |
| Coil Voltage Range | 42–48 V | |
| Power | 170 kW | |
| Current | 320 A | |
| Voltage | 48 V | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 4-pole | |
| Device Type | Contactor | |
| Current AC-1 | 450 A | |
| Series | B310 Contactors | |
| Product type | Four-pole industrial contactor | |
| Number of poles | 4 | |
| Contact configuration | 4 NO | |
| IEC thermal current Ith (AC1) | 450 A | |
| Operational current AC3 at 400 V | 320 A | |
| Rated operational power AC3 at 400 V | 170 kW | |
| Operational current AC4 at 400 V | 110 A | |
| UL/CSA horsepower rating at 480 V | 250 HP | |
| Rated operational power at 690 V | 488 kW | |
| Control coil voltage | 48 V AC/DC | |
| Type of coil | AC/DC universal coil | |
| Rated insulation voltage | 1000 V | |
| Impulse withstand voltage | 8 kV | |
| Operational frequency | 25 to 400 Hz | |
| Mounting type | Screw mounting | |
| Terminal type | Bolt connection | |
| Protection rating | IP20 | |
| Operating temperature | -50 °C to +70 °C | |
| Weight | approx. 11.1 kg | |
| Dimensions | approx. 208 × 196 × 227 mm | |
| EAN | 8013975075258 | |
| 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 |
Frequently Asked Questions
What is the LOVATO Electric 11B31040048 used for?
It is used to switch high-current four-pole electrical circuits in industrial heating, lighting, power distribution, motor control and automation systems.
What is the AC-1 current rating of this contactor?
The 11B31040048 has a conventional free-air thermal current rating of 450 A in AC-1 duty at 40 °C.
What control voltage does the coil require?
This model is equipped with a 48 V AC/DC control coil, allowing operation from a compatible AC or DC control supply.
How many poles does this contactor have?
The LOVATO 11B31040048 has four main power poles, allowing four conductors to be switched simultaneously.
What motor power can the contactor control?
The contactor is rated for motors up to approximately 170 kW at 400 V in AC-3 duty.
Trusted for Heavy-Duty Industrial Power Control
LOVATO Electric B310 contactors provide the high-current switching capacity, durable construction and control flexibility required by industrial panel builders, OEM manufacturers and automation engineers.
