ABB TF42-16 1SAZ721201R1047 Thermal Overload Relay

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1. Product Overview

The ABB TF42-16 1SAZ721201R1047 Thermal Overload Relay is a motor protection device designed to disconnect the circuit during motor overload, stall, or overheating, protecting the motor and equipment from damage. The relay operates based on a bimetallic strip heating principle and allows adjustable current settings for precise protection. TF42-16 is suitable for use with ABB contactors and is widely applied in industrial automation, machinery, and motor control systems.

2. Technical Specifications

• Model: TF42-16 1SAZ721201R1047

• Product Type: Thermal Overload Relay

• Rated Current Range: 6 – 10 A

• Operating Principle: Thermal-magnetic overload protection

• Poles: 3

• Adjustable Current Setting: Yes

• Operating Voltage: Used with contactor

• Mechanical Life: ≥ 10,000 operations

• Electrical Life: ≥ 6,000 operations

• Mounting Method: Directly mounted on corresponding contactor

• Additional Features: Manual/automatic reset option

• Degree of Protection: IP20

• Standards Compliance: IEC 60947-4-1

3. Advantages and Features

1. High-Precision Protection
   Adjustable current setting protects motors from overload and stall.

2. High Reliability
   Bimetallic strip design ensures accurate and fast response.

3. Industrial-Grade Longevity
   Mechanical and electrical life meet industrial standards for long-term use.

4. Easy Installation
   Direct mounting with ABB contactors without additional modifications.

5. Flexible Reset
   Manual or automatic reset options to suit different application requirements.

6. Wide Applicability
   Suitable for AC motor control circuits and industrial automation equipment.

4. Typical Applications

• Motor protection in industrial automation production lines

• Pumps and fan drive systems

• Conveyor equipment and processing machinery

• Motor Control Centers (MCC)

• HVAC system motor control

• OEM industrial equipment motor protection

5. Installation and Usage Notes

1. Ensure relay rated current matches motor rated current before installation.

2. Wiring and adjustment should be performed by qualified electrical engineers.

3. Avoid operation in high temperature, high humidity, or corrosive environments.

4. Regularly inspect relay operation and reset functionality to ensure motor safety.

5. When used with contactors, ensure correct model matching and secure installation.