Square D A6.20 Thermal Overload Relay Unit
The Square D A6.20 Thermal Unit is a critical component designed to protect electric motors from overheating due to prolonged overcurrent conditions. This thermal unit is part of Square D’s Type S, Type A series and utilizes a melting alloy mechanism to ensure reliable motor protection.
Key Features
- Full Load Current Range: 4.33 to 4.90 Amperes, suitable for various motor applications.
- Trip Class: Class 20, ensuring the unit trips within 20 seconds under overload conditions.
- Mounting Type: Plug-in design for easy installation and replacement.
- Operating Temperature: Rated for environments up to 40°C (104°F).
- Voltage Rating: Up to 600 VAC, accommodating a wide range of electrical systems.
Operational Mechanism
The A6.20 Thermal Unit operates by allowing motor current to pass through a small heater winding within the unit. Under overload conditions, the heat generated causes a special solder to melt, allowing a ratchet wheel to spin freely. This action opens the control circuit contacts, effectively disconnecting the motor and preventing potential damage due to excessive current.
Applications
This thermal unit is ideal for use in manual starters, NEMA overload relays, magnetic motor starters, and various motor control applications. Its reliable performance ensures the longevity and safety of motors in industrial and commercial settings.
Product Specifications
- Manufacturer: Schneider Electric (Square D)
- Part Number: A6.20
- UPC: 785901585374
- Country of Origin: Mexico
- Dimensions: 2.6 in L x 1.7 in W x 3.5 in H
Ensure compatibility with your specific motor and application requirements before installation. Proper selection and installation of thermal units are crucial for effective motor protection and system reliability.
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