Schneider Electric CA3KN31BD Auxiliary Relay 10A 3NO 1NC 24V DC

The Schneider Electric CA3KN31BD is a professional-grade auxiliary relay engineered for integration into industrial control and automation systems. This compact device is designed to manage control signals reliably, featuring a 24V DC coil voltage and a robust 10A contact rating. With a configuration of 3 normally open (NO) and 1 normally closed (NC) contacts, it provides the necessary flexibility for complex switching operations in demanding electrical environments.

Advantages

This auxiliary relay stands out due to its high operational reliability and compact design, which allows for efficient use of space within control cabinets. Its construction ensures long-term durability and consistent performance even under frequent switching cycles. The grey-colored housing is built to withstand industrial conditions, providing a secure and stable connection for control circuits while maintaining high standards of electrical safety and precision.

Suitable for

• Industrial automation control panels
• Signal switching in electrical distribution systems
• Interfacing between low-voltage controllers and higher-power contactors
• Machine tool control circuits

This relay may not be suitable for applications requiring high-power load switching, as it is designed specifically for auxiliary control signals rather than primary power distribution. It is also not intended for use in environments with extreme moisture or corrosive gases without additional protective enclosure measures.

Key specifications

• Coil voltage: 24V DC
• Contact configuration: 3NO (Normally Open) and 1NC (Normally Closed)
• Rated operational current: 10A
• Dimensions: 45 x 57 x 58 mm
• Weight: 225 g
• Color: Grey

How to use

The relay is designed for standard mounting within an electrical enclosure. Ensure that the control circuit voltage matches the 24V DC coil requirement before installation. Connect the control wires to the designated terminals according to the wiring diagram provided on the device housing. Once installed, the relay will automatically switch the auxiliary contacts based on the presence of the DC signal at the coil terminals.

What to consider before purchase

• Verify that your control system provides a 24V DC output.
• Ensure the contact configuration (3NO, 1NC) meets your specific circuit requirements.
• Check the available space in your control cabinet to accommodate the 45 x 57 x 58 mm dimensions.
• Confirm that the load being switched does not exceed the 10A rating.

Usage recommendations

Always ensure that the power supply is disconnected before performing any wiring or maintenance on the relay to prevent electrical hazards. Periodically inspect the terminal connections to ensure they remain tight and free from oxidation.