R3840 - Duplex 40/40 Circuit Breaker

R3840 - Duplex 40/40 Circuit Breaker

When you need a dependable replacement for an existing R38-40 circuit breaker, the R3840 delivers the form, fit, and function needed to keep your compatible electrical system operating as intended. Designed as a 40 Amp duplex plug-on thermal-magnetic circuit breaker, it fits directly into the original breaker location, making it an ideal solution for maintaining legacy electrical panels without modifying the existing setup. Its space-saving duplex design allows two circuits to occupy a single breaker space, making efficient use of available panel capacity while providing dependable overcurrent protection. Built to last, the R3840 combines the compatibility electricians and maintenance professionals expect with the electrical ratings required for many residential and light commercial applications. Whether you're replacing a worn breaker during routine maintenance or restoring an older panel to proper working order, this replacement offers the correct fit for compatible R38-series installations.

Key Features and Benefits

• Direct Replacement: Designed as a direct form, fit, and functional replacement for the R38-40.
• 40 Amp Rating: 40 Amp rating for compatible branch circuit protection.
• Duplex Configuration: Duplex (space-saving) configuration allows two circuits in one breaker space.
• Plug-On Design: Plug-on design for straightforward installation in compatible load centers.
• Thermal-Magnetic Protection: The thermal-magnetic trip mechanism protects against overloads and short circuits.
• Interrupting Rating: 10k A.I.C. at 120VAC interrupting rating.
• Built to Last: Built to last for dependable service in compatible electrical systems.
• Maintains Panel Layout: Helps maintain the original panel layout without requiring modifications.
  

Technical Specifications

• Part Number: R3840
  
• Replacement For: R38-40
  
• Amperage: 40 Amps
  
• Poles: Duplex
  
• Type: R38
  
• Voltage: 120VAC
  
• Interrupting Rating: 10k A.I.C. @ 120VAC
  
• Mounting Style: Plug-On
  
• Trip Mechanism: Thermal-Magnetic
  
• Dimensions:
  • Height: 4.81 in.
  • Width: 0.75 in.
  • Depth: 2.50 in.

Material Compliance and Certifications

• Industry Standards: Manufactured to meet applicable industry standards for safety and electrical performance where required.
• Compatibility: Designed for form, fit, and functional compatibility with equipment originally using the R38-40.
• Installation Requirements: Always verify compatibility with your panel and follow all applicable local electrical codes before installation.
  

Where It Works Best

• The R3840 is designed for use in compatible residential and light-commercial electrical panels that were originally equipped with an R3840 circuit breaker. Its 40-amp, duplex, plug-on configuration makes it well-suited for applications where maintaining the existing panel layout is important while providing the correct overcurrent protection for compatible branch circuits. Before installation, confirm that the breaker type, amperage, voltage rating, and panel specifications match your electrical system's requirements.