Square D | 3RV2021-4AA10 | Circuit Breaker | 4A | 3-Pole

Meet the Square D 3RV2021-4AA10: a precise, three-pole circuit breaker built for reliable protection in three‑phase electrical systems. With a 4‑amp rating, this unit is purpose‑built for applications that require careful current limiting while preserving system performance. When you’re maintaining, retrofitting, or replacing components in a panel, this breaker delivers the exact form and function you need to keep critical circuits protected.

Key advantages

• Exact part reference: 3RV2021-4AA10 ensures compatibility with panels designed for Square D 3RV breakers, simplifying replacement decisions.
• 3‑pole configuration: Ideal for three‑phase systems where simultaneous protection of all three lines is essential.
• 4‑amp protection: Provides precise current limitation for lightweight or control circuits within larger electrical installations.
• Maintenance, retrofit, or replacement: A dependable choice for upgrading aging equipment, updating panel protection, or stocking a ready‑to‑use spare.

What this means for your project

If you’re updating a panel or performing a retrofit, the 3RV2021-4AA10 offers a straightforward, reliable path to maintain consistent protection across all three phases. It’s especially valuable when projects require a specific low‑current rating without altering existing wiring or panel architecture.

Ideal use cases

• Maintenance shutdowns where a precise 4A, 3‑pole protection is needed to safeguard control circuits within a three‑phase setup.
• Retrofits that require matching the original equipment protection profile to maintain panel clearance and trip characteristics.
• Replacement scenarios where the part number is the quickest route to compatibility and performance restoration.

Important compatibility note

Before ordering, confirm fit and ratings: the 3RV2021-4AA10 is listed as the best reference for compatibility with appropriate Square D panels. Rely on the part number to ensure you receive the exact electrical characteristics and physical footprint required for a seamless installation.

For technicians and engineers seeking dependable, industry‑standard protection, the Square D 3RV2021-4AA10 3‑pole, 4A circuit breaker delivers consistent performance, clear signaling of faults, and the confidence that comes with using a recognized protection device from a trusted brand.