Square D | QDA221004 | Circuit Breaker | 100A | 2-Pole | Plug-In

Engineered by Square D, the QDA221004 is a reliable plug-in circuit breaker designed to protect 240V circuits with a robust 100A trim. Built for maintenance, retrofit, and replacement projects, this 2-pole unit slides into compatible panels with ease, restoring protection quickly and with confidence.

• Plug-in design for fast service—swap in minutes without modifying bus bars or mounting hardware, reducing downtime during panel maintenance.
• 100 amp, 2-pole protection—suitable for higher-demand circuits that require solid overcurrent protection across both legs of a 240V supply.
• Exact compatibility—identified by part number QDA221004, ensuring you’re selecting the right component for your Square D panel system.
• Maintenance, retrofit, and replacement ready—an ideal choice when upgrading or replacing aging breakers to maintain panel safety and reliability.

Compatibility and installation notes

Before ordering, confirm that your Square D panel accepts QDA-type plug-in breakers and that the ratings match your system requirements. The part number QDA221004 is the most reliable reference for compatibility, so verify this against your panel labeling and service plan.

Use cases

• Panel upgrades where 100A protection is required for critical 240V circuits
• Replacement of a failed or aging 2-pole breaker in Square D installations
• Retrofit projects in commercial or industrial panels that use plug-in breakers of the QDA family

Technical snapshot

• 100A
• Poles: 2-Pole
• Plug-In: Yes
• Part number: QDA221004
• Brand: Square D

Practical installer tip: keep a spare QDA221004 on hand for planned maintenance or rapid retrofits, and always cross-check the panel’s labeling to ensure a correct, safe fit. This targeted, plug-in solution helps maintain uninterrupted electrical protection with minimal downtime.