Square D FA34020 - 20 A, 3-Pole Plug-In Circuit Breaker | AmpState

Square D FA34020 stands out as a rugged, plug-in molded case circuit breaker designed to protect branch circuits in panelboards and load centers. At 20 amps and 3-pole, this unit delivers dependable, trip-ready protection for multi-wire and three-phase configurations, making it a practical choice for both small commercial installations and light industrial panels.

Key advantages that matter in the field

• Fast plug-in connection enables quick installation and effortless replacement, minimizing panel downtime during upgrades or maintenance.
• Thermal-magnetic trip unit provides stable, repeatable protection—responding to overcurrent with calibrated thermal sensing and rapid magnetic trip for short circuits.
• 3-pole design protects all three hot legs of compatible systems, ideal for 3-phase equipment or shared-neutral applications in the right panel environments.
• OEM compatibility is specifically matched for Square D loadcenters and panelboards, ensuring reliable fit and electrical performance.
• Versatile applicability suitable for residential, commercial, and light industrial setups where branch circuit protection is essential.

Technical snapshot

Manufacturer: Square D
Part Number: FA34020
Type: Thermal-magnetic molded case circuit breaker (MCCB)
Amperage Rating: 20A
Number of Poles: 3
Mounting Style: Plug-in
Application: Branch circuit overcurrent and short-circuit protection

Why it matters for your electrical system

In any panel deployment, protection isn’t just about stopping faults—it’s about predictable behavior and quick serviceability. The FA34020’s thermal-magnetic mechanism delivers accurate, repeatable tripping under overloads while swiftly interrupting faults that could threaten wiring insulation or connected equipment. The plug-in design simplifies upgrades and replacements, reducing labor time and panel disruption. When paired with compatible OEM load centers, this breaker maintains coordinated protection across the distribution network, helping you meet code expectations and improve overall system reliability.

Ideal use cases

• Three‑phase machinery or motors in light industrial panels that require solid 20A protection on three hot legs.
• Residential or commercial subpanels where a compact, plug‑in MCCB is preferred for easy servicing.
• Panelboard expansions or retrofits that demand quick swaps without rewiring or panel removal.
• Load centers and distribution panels that prioritize precise protection curves and dependable trip performance.

Practical tips for installers and maintainers

• Verify panel compatibility with Square D FA34020 and ensure the bus stab alignment before seating the breaker.
• When replacing an aging unit, use the same amperage rating (20A) to preserve protection coordination with downstream devices.
• Store spare plug-in breakers in a clean, dry environment to prevent coating residue or corrosion on contacts that could affect performance.
• Document part numbers (FA34020) in maintenance logs to streamline future service and panelboard audits.

For reliable, easy-to-service branch circuit protection with proven performance in a wide range of panel environments, the Square D FA34020 20A 3-Pole Plug-In Circuit Breaker from AmpState delivers a precise, durable solution engineered to keep electrical systems safe and available when it matters most.