Schneider LC1D40A TeSys‑D 3‑Pole Motor Contactor, 40A AC‑3 Rated Industrial DIN‑Rail Contactor

The Schneider LC1D40A is a high-performance three-pole power contactor belonging to Schneider’s reliable TeSys-D series, tailored for low-voltage motor control and heavy industrial load switching scenarios. Fitted with one NO and one mirror-type NC auxiliary contact, this durable switching component serves as a core control unit for standard cabinet automation and industrial power distribution systems. It sees widespread use in mechanical manufacturing, HVAC ventilation, water treatment and automated production line projects.

Capable of handling medium-to-heavy industrial operating loads, the Schneider LC1D40A features a 40A AC-3 rated operational current, perfectly matching the control demands of high-power three-phase asynchronous motors. Adopting premium flame-retardant casing and stable Everlink screw terminal structure, this contactor delivers outstanding mechanical durability and strong environmental adaptability. It is commonly deployed to regulate large industrial fans, high-flow water pump units, heavy-duty conveyor lines, industrial compressors and various high-power automated processing equipment.

Schneider LC1D40A TeSys‑D 40A Three‑Pole Industrial Motor‑Switching Contactor

1. Mechanical Structure, Installation and Environmental Adaptability

Stable Structure and Dual Installation Methods

Built with a standardized industrial casing, the Schneider LC1D40A features overall dimensions of 55mm width, 122mm height and 120mm depth, with a net weight of 0.85kg. It supports dual mounting solutions, including standard DIN rail installation and direct screw panel fixing, allowing flexible and orderly layout in limited cabinet spaces. This practical design fits OEM equipment assembly and standardized industrial cabinet configuration perfectly. With front IP20 protection rating, the unit prevents accidental contact with live internal components and blocks external dust accumulation, ensuring safe and stable long-term operation in regular industrial workshop environments.

Vibration Resistance and Wide Temperature Adaptation

The LC1D40A adopts high-quality UL94-V1 flame-retardant plastic housing that withstands 850°C high-temperature combustion, providing reliable defense against mechanical vibration, instantaneous impact shock and long-term thermal aging. Its control coil maintains full-power stable operation across -40°C to 60°C without current derating, and supports conditional operation up to 70°C with reasonable load adjustment. Adaptable to diverse harsh working conditions, it operates steadily in 5% to 95% non-condensing humidity environments and works normally at installation altitudes up to 3000 meters above sea level, fully complying with global industrial environmental standards.

2. Electrical Parameters and Switching Performance

Main Circuit Rated Electrical Specifications

Equipped with three normally open main power poles, the Schneider LC1D40A delivers a 40A AC-3 operational current at 440V, with a maximum thermal steady-state current of 60A under 60°C ambient temperature. It features a 690V rated insulation voltage and 6kV impulse withstand voltage, strictly conforming to IEC 60947-4-1 industrial safety regulations. In actual industrial application, this contactor stably drives 18.5kW three-phase motors at 380/440V and supports 22kW high-power motor operation under 500–690V power supply. Its excellent inrush current resistance effectively absorbs instantaneous motor startup surges and frequent heavy load impacts, maintaining consistent operational stability for high-load equipment.

Auxiliary Contact Configuration and Service Lifespan

Integrated with one NO and one mechanically interlocked NC mirror auxiliary contact, the LC1D40A enables real-time equipment running status feedback, electrical interlock setup and safety loop control for automated systems. It achieves 6 million mechanical operation cycles and 1.4 million electrical switching cycles under standard AC-3 load conditions, ensuring long-term reliable service for continuous production equipment. Designed with Everlink high-reliability screw-clamp terminals, it fits both solid and flexible copper wires. The recommended tightening torque is 1.7N·m for control circuits and 5.0–8.0N·m for main power circuits to guarantee stable and secure wiring connection.

3. Certification Standards and Industrial Application Scenarios

Global Certifications and Anti-Interference Performance

Fully compliant with IEC 60947-4-1, UL 60947-4-1 and CSA C22.2 NO 14 international industrial norms, the LC1D40A holds multiple authoritative global certifications including CCC, UKCA, EAC, UL and marine certification. Its optimized coil structure suppresses electromagnetic interference generated during coil de-energization, effectively protecting surrounding low-voltage control modules and precision circuit components. A complete lineup of AC coil voltage options covers nearly all mainstream control voltage specifications for global industrial automation and HVAC equipment.

Industrial Application Scope

Widely deployed in industrial automation, power control and HVAC systems, the LC1D40A undertakes stable start-stop control for large industrial ventilation units, high-flow water pump stations, heavy-load conveyor production lines, automated packaging machinery and high-power air compressors. When paired with thermal overload relays, it forms a complete integrated motor control and protection assembly for PLC-based control cabinets. Supporting a maximum switching frequency of 3600 cycles per hour, it adapts to frequent startup-shutdown working modes and supports long-term unattended stable operation of industrial production equipment.

Schneider LC1D40A Optional Voltage Suffix Models: LC1D40AB7C, LC1D40ACC7C, LC1D40AD7C, LC1D40AE7C, LC1D40AF7C, LC1D40AM7C, LC1D40AP7C, LC1D40AQ7C, LC1D40AU7C

LC1D40A Full Suffix Voltage Parameter List

All 7C-series suffix models support 50/60Hz dual-frequency operation, compatible with global industrial power supply standards:

• LC1D40AB7C: AC 24V control coil voltage, 50/60Hz

• LC1D40ACC7C: AC 36V control coil voltage, 50/60Hz

• LC1D40AD7C: AC 42V control coil voltage, 50/60Hz

• LC1D40AE7C: AC 48V control coil voltage, 50/60Hz

• LC1D40AF7C: AC 110V control coil voltage, 50/60Hz

• LC1D40AM7C: AC 220V control coil voltage, 50/60Hz (most widely used industrial specification)

• LC1D40AP7C: AC 230V control coil voltage, 50/60Hz

• LC1D40AQ7C: AC 380V control coil voltage, 50/60Hz

• LC1D40AU7C: AC 240V control coil voltage, 50/60Hz