LC1F185P7

What does this contactor do?

This is a 3-pole power contactor designed for switching motors and other higher-current loads in industrial control panels. It has three normally open main contacts, making it well suited to starting and stopping three-phase equipment.

What does 3-pole, 3 normally open mean?

It means the unit switches three power paths at the same time, and all three main contacts are open when the coil is not energised. When the coil is powered, the contacts close together to connect the load.

What coil voltage does it require?

The coil is rated for 230 V AC and is suitable for 40 to 400 Hz operation. For the LC1F185P7, this makes it a practical choice where a 230 V AC control supply is already available.

What are the main current ratings?

This model is rated at 185 A in AC-3 duty at up to 440 V, which is the typical category used for squirrel-cage motor switching. It is also rated at 275 A in AC-1 duty at up to 440 V for less demanding resistive loads.

What motor sizes is it suitable for?

Typical AC-3 motor ratings include 55 kW at 220 to 230 V, 90 kW at 380 to 400 V, 100 kW at 415 to 440 V, and 110 kW at 500 to 690 V. Actual suitability should always be checked against the full operating conditions of the application.

Can it be used for motor control as well as resistive loads?

Yes. It is intended for motor control and resistive load applications, with utilisation categories including AC-1, AC-3 and AC-4. That gives it flexibility across a range of industrial switching duties.

What is the maximum operational voltage?

The rated operational voltage is up to 690 V AC at 50/60 Hz, and up to 460 V DC. In many installations, it is commonly applied on AC motor circuits up to 440 V within its stated current rating.

How is it mounted?

This contactor is designed for plate mounting. That makes it suitable for installation inside industrial panels and enclosures where a solid fixed mounting surface is preferred.

What connection types does it use?

The control circuit uses screw clamp terminals, while the power circuit is designed for bolted connections and can accommodate options such as ring lugs, connectors or busbar arrangements. This helps it fit a variety of panel build styles.

What cable and tightening details are important?

For the control circuit, the terminals accept conductors in the 1 to 4 mm² range depending on conductor type and configuration, with a tightening torque of 1.2 Nm. The power connections use a tightening torque of 18 Nm.

What are the physical dimensions?

The unit measures approximately 174 mm high, 168.5 mm wide and 181 mm deep. Its net weight is about 4.65 kg, so panel space and mounting strength should be considered during design.

What level of front protection does it offer?

The front face is rated IP2x when fitted with shrouds. This provides protection against accidental contact from the front in line with the stated configuration.

What environmental conditions is it designed for?

The operating ambient temperature range is -5 to 55 °C, with storage down to -60 °C and up to 80 °C. It is also specified for installation at altitudes up to 3000 m without derating.

How quickly does it open and close?

The typical closing time is 35 ms and the opening time is 130 ms at the rated coil voltage. These figures are useful when assessing response time in control schemes.

How durable is it in repeated switching duty?

Mechanical durability is rated at 10 million operating cycles, with a maximum operating rate of 2400 cycles per hour at 55 °C. This makes it suitable for demanding industrial switching tasks within its published limits.

What insulation and impulse ratings does it have?

The rated insulation voltage is 1000 V in accordance with IEC 60947-4-1, and the rated impulse withstand voltage is 8 kV. These values indicate a design intended for robust industrial electrical environments.

Are there recommended fuse values for circuit protection?

Typical associated fuse ratings listed for this contactor are 200 A aM and 315 A gG at up to 440 V. Fuse selection should still be matched to the complete circuit design and duty.

Which standards is it built to?

It is specified in line with recognised standards including IEC 60947-1, IEC 60947-4-1, EN 60947-1 and EN 60947-4-1. This is helpful for panel builders and buyers looking for established industrial contactor specifications.