Square D | R3820 | Circuit Breaker | 1-Pole | 240V | Plug-In

Introducing the Square D R3820, a 1-pole, 240V plug-in circuit breaker built for dependable protection in compatible panels. This module is purpose-built for maintenance, retrofit, and replacement projects, helping you keep electrical systems safe and compliant without unnecessary downtime.

• Poles: 1-Pole
• Voltage rating: 240V
• Mounting: Plug-In design for straightforward installation in compatible Square D panels
• Compatibility reference: Part number R3820 is the best identifier for matching with your panel
• Ideal uses: Maintenance, retrofit, and replacement where a 240V, single-pole protection device is required

Why choose the R3820 for your panel? Its plug-in configuration makes swaps quick and precise, reducing service time and minimizing exposure during maintenance. Built to support 240V circuit protection, it’s a reliable choice for upgrading aging panels or refreshing a faulty breaker in a live system—without sacrificing safety or performance.

Who it's for: electricians performing panel maintenance or retrofits, facilities managers upgrading electrical infrastructure, and homeowners tackling reputable, panel-compatible replacements in Square D installations. If your project requires a single-pole, 240V plug-in breaker with clear compatibility reference, the R3820 is designed to fit your workflow.

Practical guidance for installation and use:

• Verify panel compatibility by matching the exact part number (R3820) with your enclosure’s accepted breakertype list before ordering.
• Before any work, ensure the main power is off and follow your panel’s safety procedures.
• Seat the breaker firmly in the plug-in slot with a single, decisive press until you hear a secure click.
• Use this breaker for 240V circuits where a single-pole protective device is appropriate and permitted by the panel design.