B3.20 - Square D Thermal Unit

B3.20 - Square D Thermal Unit

The Square D B3.20 thermal unit heater element is designed for your motor overload protection applications where dependable performance matters. Used with compatible overload relays, this Type B thermal unit helps protect your motors from overheating caused by excessive current conditions during operation. Commonly installed in motor starters and control equipment, the B3.20 helps overload relays respond properly to changing motor loads, helping you reduce the risk of damage and unnecessary downtime. Its compact design also makes it a practical option for maintenance work, replacements, and retrofit projects where quick installation is important. The Square D B3.20 is frequently used in HVAC systems, pumps, compressors, conveyors, and other motor-driven equipment found in commercial and industrial environments.

Key Features and Benefits

• Square D thermal unit heater element: Designed for dependable motor overload protection applications.
• Type B heater design: Used with compatible overload relays in motor starter and control equipment.
• Used in motor overload protection systems: Helps overload relays respond properly to changing motor loads.
• Helps protect motors from overheating: Designed to reduce the risk of damage caused by excessive current conditions during operation.
• Designed for compatible overload relay assemblies: Supports reliable performance in motor control systems.
• Compact size for easier installation and replacement: Makes it practical for maintenance work and retrofit projects.
• Suitable for commercial and industrial motor control systems: Commonly used in HVAC systems, pumps, compressors, conveyors, and other motor-driven equipment.
  

Technical Specifications

• Part Number: B3.20
  
• Manufacturer: Square D
  
• Product Type: Thermal Unit / Heater Element
  
• Sub-Category: Thermal Unit
  
• Type: B
  
• Height: 1.88 in
  
• Width: 0.63 in
  
• Depth: 0.38 in
  

Material Compliance and Certifications

• Application Compliance: The Square D B3.20 thermal unit heater element is designed for use in compatible motor starter and overload relay systems.
• Installation Requirements: Installation should follow applicable electrical codes and manufacturer recommendations.
  

Where It Works Best

• Motor starter assemblies
• Overload relay systems
• HVAC equipment
• Industrial motor controls
• Pump and compressor systems
• Conveyor equipment
• Commercial electrical systems
• Maintenance and replacement projects