Square D | SDT220 | Circuit Breaker | 20A | 2-Pole | 240V | Plug-In

Meet the Square D SDT220 circuit breaker—an exacting 20A, 2-pole device crafted for 240V circuits. This plug-in breaker is designed for maintenance, retrofit, and replacement projects where precise specifications matter, helping you restore reliable protection with minimal downtime.

Key specifications at a glance

• Amperage: 20A
• Poles: 2-Pole
• Voltage: 240V
• Mounting: Plug-In

Why the SDT220 stands out

• Plug-in convenience: Quick snap-in installation into compatible Square D panels, reducing service time during routine maintenance or quick replacements.
• Two-pole, 240V protection: Ensures both hot legs disconnect together, delivering safer shutoff for 240V circuits and associated equipment.
• Specific compatibility reference: The SDT220 part number is your best guide for compatibility—match it to your panel’s requirements and ratings to avoid mismatches.

Important compatibility notes

Before ordering, confirm your panel accepts a plug-in SDT-series breaker with the same ratings. Using the exact SDT220 reference helps ensure proper fit and safe operation in your setup.

Ideal use cases

• Replacement: Swap in a worn or tripping breaker in a compatible Square D panel without reconfiguring the entire distribution system.
• Maintenance and retrofit: Update aging equipment or circuits that require a 20A, 240V, two-pole plug-in solution.
• New 240V circuits: Implement reliable protection for additional 240V loads that run on a 20A profile.

Practical tips for best results

• Power down the main before removing or installing the breaker, and verify absence of voltage where you’ll work.
• Double-check panel compatibility and the SDT220’s ratings to ensure proper circuit protection and compliance with your installation’s requirements.
• Keep the SDT220 part number handy for future replacements or retrofits to maintain consistent performance across your panels.