ABB TF65-33 1SAZ811201R1002 Thermal Overload Relay

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  • 1. Product Overview

    The ABB TF65-33 Thermal Overload Relay is a key protective device for motors, preventing damage caused by overload, phase loss, or stalling. It is designed to work with three-pole contactors, providing precise thermal protection to ensure safe and reliable operation of industrial equipment and motors.

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    2. Technical Specifications

    • Model: TF65-33 / 1SAZ811201R1002

    • Device Type: Thermal Overload Relay

    • Rated Current Range: 6.3–10 A

    • Contact Type: 1 NO + 1 NC (Normally Open + Normally Closed)

    • Adjustable Range: 6.3–10 A

    • Protection Functions: Overload, phase failure protection

    • Compatible Contactor: AF series contactors

    • Trip Type: Thermal-magnetic

    • Mounting: Directly mounted on contactor

    • Operating Temperature: -25 °C to +60 °C

    • Standards: IEC 60947-4-1

    • Dimensions: approx. 45 mm × 65 mm × 75 mm

    • Weight: approx. 0.15 kg

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    3. Key Advantages and Features

    • Precise Protection: Adjustable to motor rated current to prevent overload

    • Fast Response: Quickly disconnects in abnormal conditions

    • Easy Installation: Directly mounted with contactor, no extra bracket required

    • Compact and Durable: Industrial-grade, resistant to high temperature and vibration

    • High Reliability: Long mechanical and electrical life, ensuring motor safety

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    4. Typical Applications

    • Industrial motor protection

    • Machinery and automated production lines

    • Pumps, fans, compressors, and other driven equipment

    • Motor control centers and distribution panels

    • HVAC systems and industrial facilities

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    5. Installation and Usage Notes

    • Ensure power is off before installation

    • Adjust relay current range to match motor rated current

    • Regularly inspect wiring and contact status

    • Avoid prolonged exposure in high humidity or corrosive environments

    • Ensure secure connection to contactor and maintain proper cooling

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