A14.1 - Square D Thermal Unit

A14.1 - Square D Thermal Unit

When motor systems are pushed hard day after day, dependable overload protection becomes critical. The A14.1 Thermal Overload Unit is designed to help keep industrial and commercial motor control systems running safely and efficiently by protecting motors, controllers, and branch circuit conductors from excessive heat caused by prolonged overcurrent conditions. Built with a proven melting alloy thermal overload design and a Class 20 trip characteristic, this thermal unit reacts quickly to overload conditions — including locked-rotor conditions — to help reduce the risk of motor damage, costly downtime, and unnecessary maintenance. Its compact one-piece construction adds reliability while simplifying installation and replacement in a wide range of motor starter applications. Whether used in manufacturing facilities, HVAC systems, or heavy-duty equipment operations, the A14.1 thermal overload unit delivers the consistent performance electrical professionals expect for demanding motor protection environments.

Key Features and Benefits

• Class 20 Thermal Overload Protection: Designed for dependable motor safeguarding in demanding industrial and commercial applications.
• Melting Alloy Overload Technology: Delivers accurate and reliable trip performance during overload conditions.
• Motor and Circuit Protection: Helps protect motors, controllers, and branch circuit conductors from overheating damage caused by prolonged overcurrent conditions.
• Fast Overload Response: Responds to overload current conditions within 20 seconds or less according to trip curves, including locked-rotor conditions.
• Reduced Downtime: Designed to help minimize equipment downtime and extend motor life in continuous-duty operations.
• Durable One-Piece Construction: Supports long-term performance and reliability in industrial environments.
• Compact Design: Allows convenient integration into compatible motor control systems and starter applications.
• Coordinated Branch Circuit Protection: Works alongside properly coordinated circuit breakers or fuses for complete branch circuit protection.
  

Technical Specifications

• Catalog Number: A14.1
  
• Product Type: Thermal Overload Unit
  
• Thermal Overload Type: Melting Alloy
  
• Motor Tripping Class: Class 20
  
• Product Range: Type A
• Country of Origin: Mexico
  
• Dimensions:
  • Height:1.5 in
  • Width: 2.188 in
  • Depth: 2.0 in

Material Compliance and Certifications

• Industrial Motor Protection Applications: Manufactured for industrial motor protection applications requiring dependable overload response.
• Motor Control Circuit Integration: Designed for integration into properly protected motor control circuits.
• Commercial and Industrial Reliability: Supports reliable overload protection in commercial and industrial environments.
• Manufacturer Warranty: Backed by an 18-month manufacturer warranty for added peace of mind.
  

Where It Works Best

• Industrial motor starter applications
• HVAC equipment and air handling systems
• Conveyor and material handling systems
• Pumps and compressor installations
• Manufacturing and production equipment
• Motor control centers require dependable overload protection
• Facilities with frequent motor start-stop cycles
• Commercial and industrial electrical systems need an accurate overload response