Contactor 25A 4NO 230V

The Legrand CX³ 412551 contactor is a modular device designed for the remote control of electrical loads. It features 4 poles with 4 normally open contacts, a rated current of 25 amps, a power circuit rated at 400 volts AC, and a control coil rated at 230 volts AC.

Its four-pole configuration allows several conductors to be switched simultaneously with a single control signal. It is especially suitable for operating lighting circuits, heating systems, pumps, and other compatible loads, and is installed on DIN rail while taking up only 2 modules.

Legrand CX³ four-pole 25-amp contactor

Reference 412551 belongs to Legrand's CX³ range of modular contactors. It incorporates 4 normally open power contacts, which remain open when the coil is not energized and close when the corresponding control voltage is applied.

This operation makes it possible to electrically separate the control circuit from the power circuit, so that a control signal can connect or disconnect higher-consumption loads without the full power current having to flow directly through the device generating the command.

230-volt control coil

The Legrand 412551 includes a 230-volt AC energizing coil. The control voltage range specified by the manufacturer is between 195 and 253 volts.

When the coil is energized, the electromagnetic mechanism actuates the 4 normally open contacts and allows the connected loads to be powered. When the control signal disappears, the contactor returns to its corresponding operating state.

The rated frequency of the control and power circuits is 50 or 60 hertz.

4 normally open contacts

This contactor has 4 poles and 4 normally open contacts, with no normally closed main contacts.

Its configuration allows the simultaneous switching of up to four conductors, making it especially useful in three-phase circuits and other applications where simultaneous disconnection of several poles is required.

25-amp current rating depending on the load

The current a contactor can control depends on the type of load and its utilization category. For reference 412551, Legrand specifies an operating current of 25 amps in AC-7a or AC-1 categories.

These categories are mainly associated with resistive or slightly inductive loads, such as certain heating systems and other power applications.

For loads corresponding to AC-7b or AC-3 categories, the operating current indicated by Legrand is 10 amps. For this reason, the contactor should be selected by considering both the circuit current and the nature of the load to be controlled.

400-volt power circuit

The contactor is designed for a rated operating voltage of 400 volts AC. This feature, together with its 4 poles, makes it suitable for use in electrical panels where compatible four-pole circuits need to be controlled.

The power circuit voltage should not be confused with the coil voltage: the main circuit operates at 400 volts, while the control coil operates at 230 volts.

For lighting, heating, and pumps

Legrand recommends this reference for controlling high-energy-consumption loads, such as heating systems, lighting installations, and pumps.

It can be integrated with switches, time switches, thermostats, control systems, and other devices capable of providing the appropriate signal to the 230-volt coil.

This configuration makes it possible to automate the switching on and off of equipment from the electrical panel without having to operate the power circuit directly.

Capacity for different lighting loads

In addition to the rated current, Legrand provides specific values for different lighting technologies.

• Maximum load for incandescent lamps: 3,000 watts.
• Maximum load for fluorescent lamps: 2,100 volt-amperes.
• Maximum load for fluorescent lamps in duo circuit: 2,200 volt-amperes.
• Maximum load for parallel-compensated fluorescent lamps: 1,000 volt-amperes.

These values should always be combined with the specific characteristics of the luminaires, their inrush currents, and the circuit conditions.

Front manual override

The contactor includes a front manual override that allows direct operation of the device during checking, testing, or maintenance tasks.

The mechanism allows permanent on or off positions without automatic return, making diagnosis and intervention on the installation easier.

Compact 2-module format

The Legrand CX³ 412551 is designed for installation on DIN rail and takes up only 2 modules, making it easy to integrate into electrical panels with limited space.

Its approximate dimensions are:

• Width: 35.6 mm.
• Height: 94.9 mm.
• Depth: 72.6 mm.
• Installation depth: 44 mm.

DIN rail mounting

The contactor includes fastening systems that make it easy to mount on DIN rail inside the electrical panel.

The range also allows the installation and passage of fork-type distribution combs from the top, facilitating certain supply configurations together with other modular devices.

Label holder for circuit identification

The front features a label holder that makes it easy to clearly identify the function of the contactor or the load it controls.

This feature simplifies inspection and maintenance in panels with multiple circuits, allowing the corresponding device to be located quickly.

Compatible with Legrand auxiliaries

Reference 412551 can be complemented with compatible Legrand auxiliary devices. The manufacturer specifically indicates the possibility of adding auxiliary reference 412430.

These accessories expand signaling or control options when the installation design requires it.

IP2X protection

The contactor has an IP2X protection rating. Once correctly installed inside the electrical panel, its design provides protection against access to hazardous parts in accordance with the conditions defined for this protection rating.

Complies with IEC/EN 61095

The Legrand CX³ 412551 is manufactured in accordance with IEC/EN 61095, applicable to electromechanical contactors intended for domestic and similar applications.

Its technology corresponds to a monostable electromagnetic contactor designed to control loads remotely by means of an electrical signal.

Technical features of the Legrand 412551

• Brand: Legrand.
• Range: CX³.
• Reference: 412551.
• EAN: 3245064125512.
• Product type: modular power contactor.
• Technology: monostable electromagnetic contactor.
• Number of poles: 4.
• Normally open contacts: 4.
• Normally closed contacts: none.
• Operating current AC-7a or AC-1: 25 amps.
• Operating current AC-7b or AC-3: 10 amps.
• Rated power circuit voltage: 400 volts AC.
• Rated coil voltage: 230 volts AC.
• Control voltage range: between 195 and 253 volts.
• Frequency: 50 or 60 hertz.
• Maximum load for incandescent lamps: 3,000 watts.
• Maximum load for fluorescent lamps: 2,100 volt-amperes.
• Maximum load for fluorescent lamps in duo circuit: 2,200 volt-amperes.
• Maximum load for parallel-compensated fluorescent lamps: 1,000 volt-amperes.
• Front manual override: yes.
• Mounting: DIN rail.
• Number of modules: 2.
• Width: 35.6 mm.
• Height: 94.9 mm.
• Depth: 72.6 mm.
• Installation depth: 44 mm.
• Protection rating: IP2X.
• Label holder: yes.
• Compatible with auxiliaries: yes.
• Auxiliary indicated by Legrand: reference 412430.
• Standard: IEC/EN 61095.

Four-pole contactor for automating loads from the electrical panel

The Legrand CX³ 412551 combines 4 normally open contacts, a current rating of up to 25 amps, a 230-volt control coil, and a 400-volt power circuit in a compact format of only 2 modules.

Its four-pole configuration, front manual override, DIN rail mounting, and compatibility with auxiliaries make it suitable for integration into automation systems for lighting, heating, pumps, and other compatible loads, always selecting it according to the corresponding utilization category.