NB221050 - 50Amp Circuit Breaker

NB221050 - 50Amp Circuit Breaker

The NB221050 50 Amp Circuit Breaker is a dual-pole, bolt-on breaker engineered to deliver dependable circuit protection in residential and light commercial electrical systems. Designed for 120/240VAC applications, this thermal magnetic circuit breaker provides precise protection against overloads and short circuits, helping safeguard wiring, equipment, and connected loads. With a 10kAIC interrupting rating and a secure bolt-on mounting configuration, the NB221050 is built for consistent performance in maintenance, repair, and panel upgrade projects where reliability and safety are critical.

Key Features and Benefits

• 50 Amp, Dual-Pole Protection: Designed to protect 120/240V circuits requiring higher amperage, making it ideal for larger branch circuits and heavy-duty equipment loads.
• Thermal Magnetic Trip Mechanism: Combines long-time thermal overload protection with instantaneous magnetic short-circuit protection for accurate and dependable fault response.
• Bolt-On Installation: Provides a firm, stable connection to the panelboard, helping reduce the risk of loose connections and improving long-term electrical integrity.
• 10kAIC Interrupting Rating: Rated to safely interrupt fault currents up to 10,000 amps at 120/240VAC, supporting code-compliant installations.
• Compact, Space-Efficient Design: Engineered to fit seamlessly into compatible panelboards where space and layout matter.
• Durable Construction: Built with high-quality internal components designed to perform reliably under demanding electrical conditions.

Technical Specifications

• Product Model: NB221050
  
• Amperage Rating: 50 Amps
  
• Poles: 2
  
• Voltage Rating: 120/240VAC
  
• Interrupting Rating: 10kAIC
  
• Frame Type: NB
  
• Mounting Type: Bolt-On
  
• Dimensions: 2.00" W x 3.38" L x 2.31" D
  
• Approximate Ship Weight: 1.75 lbs
  

Material Compliance and Certifications

• The NB221050 50A circuit breaker is manufactured in accordance with established industry standards for safety and performance. Built from quality materials and tested to meet applicable electrical requirements, this breaker is designed to provide safe, consistent operation when installed in compatible equipment and according to electrical code guidelines.

Where It Works Best

• This 50 amp dual-pole circuit breaker is well suited for residential and light commercial maintenance applications, including panel repairs, system upgrades, and replacement of existing NB frame breakers. It’s a practical choice for protecting larger branch circuits such as HVAC systems, water heaters, ranges, and other 240V loads where dependable overcurrent protection is essential. Electricians and facility maintenance professionals rely on breakers like the NB221050 to help maintain safe, code-compliant electrical systems without compromising performance.