Power Contactor Schneider Electric LC1D18B5 18A 3P 24V AC 50Hz 1NO 1NC

Schneider Electric LC1D18B5 is a 3-pole power contactor designed for switching and controlling industrial loads. Rated for 18 A per pole, it incorporates a 24 V AC 50 Hz coil and one normally open (1NO) plus one normally closed (1NC) auxiliary contact. The device is intended for installation in control panels and automation systems where compact, reliable switching of motors, heaters, and resistive or inductive loads is required.

Advantages

The contactor provides compact three-pole switching with clear separation of power and control circuits, reducing panel space and simplifying wiring. Its 24 V AC coil conforms to common control voltages, and the integrated auxiliary contacts enable straightforward signaling and interlocking without extra components. The design supports repeated switching cycles and integration with standard control devices used in industrial and commercial automation.

Suitable for

• Switching and controlling small to medium three-phase motors
• Control of heaters and resistive loads in industrial equipment
• Integration into control panels, PLC-based automation and motor starters
• Interlocking and status feedback using auxiliary contacts

Key specifications

• Number of poles: 3
• Rated operational current: 18 A
• Coil voltage and frequency: 24 V AC, 50 Hz
• Auxiliary contacts: 1 normally open (1NO) and 1 normally closed (1NC)
• Intended load types: resistive and inductive loads, motors and heaters

How to use

Mount the contactor in a suitable control cabinet or panel space following electrical safety standards and local regulations. Connect line and load conductors to the three main poles and wire the coil to a 24 V AC control circuit. Use the auxiliary contacts for control logic, signaling, or interlock circuits. Verify correct tightness of terminals and perform insulation and continuity checks before commissioning. Ensure the contactor is installed with appropriate overload protection and ahead-of-line fusing as required by the application.

Usage recommendations

Use the contactor within its rated current and supply parameters, and pair it with thermal overload relays or motor protection devices for motor applications. Avoid exposure to environments with excessive dust, corrosive gases, or temperatures outside the manufacturer's specified operating range. Regularly inspect electrical connections and contact wear as part of preventive maintenance.