SCHNEIDERE modular contactor Acti9 iCTK50-25-40-230 A9C40425 25A 4NO 50Hz 220/240 VAC

SCHNEIDERE modular contactor Acti9 iCTK50-25-40-230 A9C40425 is a DIN-rail mount electrical switching device rated for 25 A with four normally open contacts. Designed for 50 Hz distribution systems with a control coil voltage of 220/240 VAC, this compact contactor provides reliable switching of resistive and inductive loads in distribution boards and control panels. The device has a fixed contact configuration without auxiliary contact expansion and is intended for direct installation in modular electrical enclosures.

Advantages

The modular contactor offers a compact footprint and a standard DIN-rail mounting format that simplifies installation in distribution boards. With four normally open contacts and a 25 A continuous rating, it supports switching of multiple circuits or loads from a single device. The 220/240 VAC coil is compatible with common control voltages in commercial and utility installations, and the fixed-contact design reduces complexity when auxiliary contacts are not required.

Suitable for

• Switching lighting circuits in commercial or residential distribution boards
• Controlling resistive loads such as electric heaters
• Basic motor control for small motors where a contactor with 4NO is sufficient
• Integration into control panels and automation racks with 50 Hz supply

When it may not be suitable

This contactor is not suitable when auxiliary contacts or additional contact configurations are required for interlocking, signalling, or complex control schemes, because it has a fixed contact layout without expansion capability. It may also be inappropriate for applications requiring higher continuous current ratings than 25 A or for specialized motor protection where thermal overload or integrated protections are needed.

Key specifications

• Rated current: 25 A (continuous)
• Contact configuration: 4 normally open (4NO)
• Coil voltage: 220/240 VAC
• Supply frequency: 50 Hz
• Mounting: DIN-rail (modular enclosure compatible)
• Intended loads: resistive and inductive switching

How to use

Install the contactor on a standard DIN-rail inside the distribution board or control panel, following local electrical codes. Connect supply and load conductors to the corresponding fixed contacts, and wire the coil to a 220/240 VAC control circuit. Ensure correct tightening of terminal screws and verify that the contactor is accessible for inspection. Test the switching operation under no-load conditions before connecting full load, and label circuits as required for safe maintenance.

What to consider before purchase

• Ensure 25 A continuous rating meets the expected load current, including inrush for motors or lamps
• Confirm the coil voltage (220/240 VAC) matches your control supply
• Verify that a fixed 4NO contact configuration is adequate for your control and signalling needs
• Check available panel space for DIN-rail mounting and modular device width

Usage recommendations

For reliable operation, protect the contactor and connected circuits with suitable upstream overcurrent protection sized to coordination requirements, and avoid switching highly inductive loads without proper suppression. Periodic inspection of terminals and contact operation is advised, especially in installations with frequent switching or heavy-duty cycles.