Schneider Electric LR2K0312 Thermal Overload Relay 3.7-5.5A

The Schneider Electric LR2K0312 is a high-quality thermal overload relay from the TeSys K series, specifically engineered to provide reliable protection for electric motors. With an adjustable current setting range of 3.7 to 5.5A, this device acts as a critical safety component in industrial electrical systems, preventing damage caused by thermal overloads. Its robust design and adherence to international safety standards ensure consistent performance and longevity in demanding environments.

Advantages

This thermal overload relay offers exceptional reliability through its differential protection mechanism, which is designed to trip quickly in the event of phase imbalance or overload. The compact dimensions allow for efficient use of space within control panels, while the high-quality construction ensures durability under continuous operation. By integrating this component into your motor control circuit, you significantly reduce the risk of motor burnout and costly downtime, ensuring that your equipment remains protected according to global industrial standards.

Suitable for

• Industrial motor control circuits
• Protection of small AC motors
• Integration into TeSys K contactor assemblies
• Automation systems requiring precise thermal monitoring

This relay may not be suitable for applications requiring current ranges outside of the 3.7 to 5.5A threshold. It is also not intended for use in environments where the ambient temperature or environmental conditions exceed the specifications defined by the manufacturer's technical documentation.

Key specifications

• Current adjustment range: 3.7 to 5.5 A
• Tripping class: 10A
• Protection type: Differential thermal overload
• Dimensions: 45 x 65 x 58 mm
• Weight: 145 g
• Certifications: IEC 60947, UL, CSA, VDE 0660
• Ingress protection: IP2x

Installation should be performed by a qualified professional in accordance with local electrical codes. The relay is typically mounted directly onto a compatible contactor. Ensure that the current setting dial is adjusted to match the full-load current rating of the motor being protected. Once installed, verify the wiring connections and perform a test trip if the system allows to ensure the protection mechanism is functional.

What to consider before purchase

• Verify that your motor's full-load current falls within the 3.7 to 5.5A range.
• Ensure compatibility with your existing contactor model.
• Check the available space in your electrical enclosure for the 45 x 65 x 58 mm dimensions.
• Confirm that the environmental conditions meet the IP2x protection rating requirements.

Always ensure the power supply is disconnected before installing or adjusting the relay. Regularly inspect the device for signs of wear or thermal damage to maintain optimal motor protection.