QOB120HM - 20 Amp Circuit Breaker

QOB120HM - 20 Amp Circuit Breaker

When your application calls for dependable circuit protection without unnecessary trips during equipment startup, the Square D QOB120HM is built for the job. This 20 amp, single-pole bolt-on circuit breaker features a high magnetic trip rating, making it an excellent choice for circuits that experience higher inrush currents from motors, transformers, compressors, and similar equipment. Instead of interrupting power during normal startup conditions, it helps keep your system running while still providing reliable overcurrent protection when it matters most. Designed for use in compatible Type QOB panelboards, the QOB120HM combines a secure bolt-on connection with a 10kA interrupting capacity at 120/240VAC, helping protect electrical systems from overloads and short circuits. Its compact size also makes installation straightforward in applications where panel space is limited. Whether you're replacing an existing breaker during routine maintenance or servicing a commercial or industrial electrical system, the QOB120HM delivers the dependable performance electricians and maintenance professionals expect from a high-quality molded case circuit breaker.

Key Features and Benefits

• 20 Amp Current Rating: 20 Amp current rating for dependable branch circuit protection
• Single-Pole Configuration: Single-pole (1P) configuration for 120/240VAC electrical systems
• High Magnetic Trip Rating: High magnetic trip rating helps minimize nuisance tripping caused by motor or transformer startup currents
• Bolt-On Mounting: Bolt-on mounting provides a secure mechanical and electrical connection within compatible panelboards
• 10kA Interrupting Capacity: 10kA interrupting capacity (A.I.C.) at 120/240VAC for reliable fault protection
• Compact Design: Compact design fits efficiently into compatible electrical distribution equipment
• Ideal for Commercial, Industrial, and Institutional Applications: Ideal for commercial, industrial, and institutional applications
  

Technical Specifications

• Part Number: QOB120HM
  
• Manufacturer Series: QOB-HM
  
• Poles: 1
  
• Amperage: 20A
  
• Voltage Rating: 120/240VAC
  
• Interrupting Capacity: 10kA @ 120/240VAC
  
• Mounting Style: Bolt-On
  
• Dimensions:
  • Height: 3.0 in.
  • Width: 0.75 in.
  • Depth: 2.5 in.
• Special Feature: High Magnetic Trip Rating
  

Material Compliance and Certifications

• Industry Standards: The QOB120HM is manufactured to meet applicable industry standards for low-voltage molded case circuit breakers.
• Installation Requirements: It is intended for installation in compatible electrical distribution equipment and should always be installed according to applicable electrical codes and manufacturer recommendations.
• Compatibility: Confirm compatibility with your panelboard and system requirements before installation.
  

Where It Works Best

• The Square D QOB120HM is a great fit anywhere equipment draws a higher surge of current during startup. It's commonly used in commercial buildings, industrial facilities, manufacturing plants, schools, healthcare facilities, and other demanding electrical environments where dependable circuit protection is essential.
  • Motor control circuits
  • HVAC equipment
  • Air compressors
  • Pumps
  • Transformers
  • Industrial machinery
  • Mechanical equipment with high inrush current
  Its high magnetic trip design helps reduce unnecessary interruptions during normal equipment startup while still providing the overcurrent protection needed to help safeguard your electrical system.