F&F Modular Contactor ST25-40-24V, 25A, 4 Normally Open Contacts, 24V AC Coil

The F&F Modular Contactor ST25-40-24V is a high-quality electromechanical switching device engineered for precise control of electrical circuits. Designed for seamless integration into standard distribution boards, this contactor provides a reliable solution for managing power distribution in both residential and industrial environments. With its robust construction and 25A rated current capacity, it ensures consistent performance in demanding electrical applications.

The primary advantage of this modular contactor lies in its reliable switching capability and compact design, which allows for efficient space utilization on a DIN rail. The device features four normally open contacts, providing versatile configuration options for various automation tasks. Its 24V AC coil operation ensures compatibility with low-voltage control systems, enhancing safety and operational flexibility in complex electrical installations.

Suitable for

• Residential lighting control systems
• Industrial automation and machinery control
• Heating and ventilation system management
• Power distribution in modular electrical cabinets

This device may not be suitable for applications requiring high-frequency switching beyond its mechanical endurance limits or in environments with extreme vibration. It is also not intended for use in circuits exceeding its 25A rated current capacity or in highly corrosive atmospheres without appropriate protective enclosures.

Key specifications

• Rated current: 25A
• Contact configuration: 4 normally open (4Z)
• Coil voltage: 24V AC
• Mounting type: DIN rail (35mm)
• Modular design for standard distribution boards

To use the F&F Modular Contactor, mount the device onto a standard 35mm DIN rail within your electrical distribution board. Connect the power supply lines to the main power terminals and wire the 24V AC control signal to the coil terminals. Ensure all connections are tightened securely according to the specified torque requirements to prevent overheating and ensure optimal electrical contact.

What to consider before purchase

• Verify that your control system provides a 24V AC signal
• Ensure the total load current does not exceed 25A
• Check available space on the DIN rail for modular installation
• Confirm the compatibility of the 4 normally open contacts with your circuit design

For optimal longevity and performance, ensure the contactor is installed in a well-ventilated enclosure to prevent heat buildup. Regularly inspect the terminal connections for tightness during routine maintenance to maintain electrical integrity.