Contactor 40A 2NO 230V

The Legrand CX³ 412545 contactor is a modular device designed for the remote control of electrical loads. It features 2 poles with 2 normally open contacts, a rated current of 40 amps, and a control coil of 230 volts AC.

It is especially suitable for switching loads such as lighting circuits, heating systems, and pumps. Its DIN rail mounting, 2-module format, and front manual override make it easy to integrate into residential, commercial, and other automation and control electrical panels.

Legrand CX³ 40 amp contactor with 2 normally open contacts

Reference 412545 belongs to Legrand’s CX³ range of modular contactors. It incorporates 2 normally open power contacts, which remain open when the coil is not energized and close when the device receives the corresponding control signal.

This configuration makes it possible to connect and disconnect an electrical load via an external command, separating the control circuit from the power circuit.

230-volt control coil

The contactor includes a 230-volt AC control coil. Legrand specifies an operating voltage range between 195 and 253 volts.

When voltage is applied to the coil, the mechanism actuates the power contacts and allows the connected load to be energized. When the control signal disappears, the contacts return to their normal state.

Current rating up to 40 amps

The Legrand 412545 supports an operating current of 40 amps in AC-7a or AC-1 categories, used for mainly resistive or slightly inductive loads.

For applications corresponding to AC-7b or AC-3 categories, associated with certain motor loads, Legrand indicates an operating current of 22 amps.

The contactor should be selected taking into account both the current and the type of load, as well as the corresponding utilization category.

250-volt operating voltage

This bipolar contactor is designed to operate with a rated operating voltage of 250 volts AC. Its 2 poles allow simultaneous switching of two conductors with a single control command.

This configuration is especially suitable for single-phase circuits and other applications compatible with the device’s electrical characteristics.

Lighting, heating, and pump control

Legrand specifies this contactor for controlling high-consumption loads, including lighting installations, heating systems, and pumps.

The device allows a control signal to manage the connection and disconnection of the power circuit, making it easy to integrate with thermostats, time switches, energy management systems, and other compatible automation devices.

Front manual override

The Legrand CX³ 412545 includes a front-accessible manual override after removing the corresponding cover.

This override allows direct operation of the contactor for testing, checking, and maintenance tasks. Legrand indicates the possibility of selecting a permanent ON or OFF position without automatic return.

2-module modular format

The contactor is designed for installation on DIN rail and occupies a width equivalent to 2 modules, making it easy to integrate alongside miniature circuit breakers, residual current devices, time switches, impulse relays, and other modular devices.

It features two DIN rail fixing systems, located at the top and bottom, to simplify installation and removal.

Compatible with busbar power supply

The design allows installation of a fork-type power busbar from the top, facilitating certain electrical distribution configurations inside the panel.

The CX³ range therefore helps maintain an orderly installation and simplifies wiring when compatible modular devices are used.

Label holder for circuit identification

The front includes a label holder intended to clearly identify the load or circuit controlled by the contactor.

This feature is especially useful in panels with numerous devices, as it makes maintenance, inspection, and circuit location easier.

Compatible with Legrand auxiliaries

The contactor can be complemented with compatible auxiliary devices. Legrand specifically indicates the possibility of installing auxiliary reference 412431, allowing the device’s control and signaling functions to be expanded.

Capacity for different lighting loads

Legrand provides specific load values for different lighting technologies. For incandescent lamps, the maximum indicated load is 5,000 watts.

In installations with fluorescent lamps, the maximum indicated capacity is 3,100 volt-amperes, while in duo circuits it reaches 3,400 volt-amperes. For parallel-compensated fluorescent installations, the specified value is 1,400 volt-amperes.

Protection and standards

The contactor has an IP2X protection rating and is manufactured in accordance with IEC/EN 61095, applicable to electromechanical contactors for household installations and similar uses.

Reference 412545 also has official product certifications for the CX³ range.

Legrand 412545 technical features

• Brand: Legrand.
• Range: CX³.
• Reference: 412545.
• EAN: 3245064125451.
• Product type: modular power contactor.
• Number of poles: 2.
• Normally open contacts: 2.
• Normally closed contacts: none.
• AC-7a or AC-1 operating current: 40 amps.
• AC-7b or AC-3 operating current: 22 amps.
• Rated operating voltage: 250 volts AC.
• Rated coil voltage: 230 volts AC.
• Operating voltage range: between 195 and 253 volts.
• Applications: lighting, heating, and pumps.
• Front manual override: yes.
• Mounting: DIN rail.
• Number of modules: 2.
• Width: 68 mm.
• Height: 94 mm.
• Depth: 35.6 mm.
• Installation depth: 44 mm.
• Protection rating: IP2X.
• Maximum load for incandescent lamps: 5,000 watts.
• Maximum load for fluorescent lamps: 3,100 volt-amperes.
• Maximum load for fluorescent lamps in duo circuit: 3,400 volt-amperes.
• Maximum load for parallel-compensated fluorescent lamps: 1,400 volt-amperes.
• Compatible with auxiliaries: yes.
• Auxiliary indicated by Legrand: reference 412431.
• Standard: IEC/EN 61095.

Bipolar contactor for load automation

The Legrand CX³ 412545 combines a current rating of up to 40 amps, 2 normally open contacts, and a 230-volt coil in a 2-module modular format.

Its front manual override, DIN rail mounting, auxiliary compatibility, and ability to control lighting, heating, and pumps make it a practical solution for automating electrical loads from the distribution board.