CH120 **Old Style Half Notch** - 20Amp Circuit Breaker

CH120 **Old Style Half Notch** - 20 Amp Circuit Breaker

The CH120 Old Style Half Notch circuit breaker is a 20-amp, single-pole plug-on breaker designed for use in legacy CH load centers requiring the older half notch configuration. Built for dependable circuit protection in residential and light commercial electrical systems, this breaker delivers 10kA interrupting capacity at 120VAC, helping safeguard branch circuits from overloads and short circuits. Its compact CH frame design ensures proper form, fit, and function when replacing an existing compatible breaker in panels originally manufactured for this style. If you are maintaining or servicing an older CH panelboard, this breaker provides the correct physical configuration and electrical ratings needed to keep your system operating safely and as intended.

Designed with durability in mind, the CH120 half notch breaker is built to last and supports consistent thermal-magnetic trip performance. Its plug-on mounting style allows for straightforward installation in compatible CH load centers, making it a practical solution for electricians, contractors, and facility maintenance professionals working with established electrical infrastructure.

Key Features and Benefits

• 20 Amp, Single-Pole Protection: Designed for 120VAC branch circuits in residential and light commercial applications.
• 10kA Interrupting Capacity: Rated for 10,000 A.I.C. at 120VAC to handle fault conditions within its specified limits.
• CH Frame Type: Engineered for use in compatible CH load centers requiring this specific frame style.
• Old Style Half Notch Configuration: Correct physical design for legacy panels that require the half notch plug-on breaker format.
• Thermal-Magnetic Trip Mechanism: Provides reliable protection against both overloads and short circuits.
• Compact, Space-Efficient Design: Fits standard single-pole breaker spaces in applicable panels.
• Built to Last: Constructed for long-term service in properly matched electrical systems.
  

Technical Specifications

• Part Number: CH120 (Old Style Half Notch)
  
• Poles: 1
  
• Amperes: 20A
  
• Voltage Rating: 120VAC
  
• Interrupting Rating (A.I.C.): 10kA @ 120VAC
  
• Frame Type: CH
  
• Mounting Style: Plug-On (Half Notch, Older Style)
  
• Height: 3.0 inches
  
• Ship Weight: 0.75 lbs
  

Material Compliance and Certifications

• Industry Standards: This circuit breaker is manufactured to meet applicable industry standards for molded case circuit breakers, including UL listing requirements for branch circuit protection when installed in compatible equipment.
• Installation Notice: Always verify panel compatibility and local code requirements prior to installation. Proper installation by a qualified professional helps ensure compliance with NEC and local electrical regulations.
  

Where It Works Best

• Maintenance and repair of existing CH load centers that require the half notch design
• Residential branch circuits rated at 20 amps and 120VAC
• Light commercial electrical panels using compatible CH frame breakers
• Replacement applications where exact physical configuration is necessary for proper panel fit