Square D FA34025 I-Line Molded Case Circuit Breaker | 25A 3-Pole 480V

Square D FA34025 – 25 Amp 3-Pole I-Line Molded Case Circuit Breaker (480V)

The Square D FA34025 is a heavy-duty 3-pole, 25-amp molded case circuit breaker (MCCB) designed for industrial and commercial power distribution panels. Part of Square D's trusted FA-frame series, this breaker features an I-Line style plug-in connection for fast, tool-friendly installation into compatible Square D I-Line panelboards — making it a top choice for electricians, industrial facilities, and MRO procurement teams.

Key Specifications

• Part Number: FA34025
• Manufacturer: Square D (Schneider Electric)
• Ampere Rating: 25A
• Poles: 3-Pole
• Voltage Rating: 480V AC
• Interrupting Rating: 18kAIC @ 480V
• Trip Type: Thermal-Magnetic (LI – Long-time & Instantaneous)
• Connection Type: I-Line Style Plug-In
• Frame Series: FA-Frame
• Standard: UL Listed

What Is the Square D FA34025?

The FA34025 is a thermal-magnetic molded case circuit breaker that provides reliable overcurrent and short-circuit protection for three-phase electrical systems. It uses a dual-function trip mechanism: long-time (thermal) protection for sustained overloads and instantaneous (magnetic) protection for sudden fault currents — together delivering the LI trip profile required in demanding industrial environments.

With a plug-in I-Line mounting style, the FA34025 connects directly to Square D I-Line buswork without additional hardware, significantly reducing installation time and labor costs in new installations and replacements alike.

Why Choose the Square D FA34025?

• Fast Plug-In Installation: The I-Line connection style enables quick installation and removal from compatible Square D panelboards without tools.
• Proven Thermal-Magnetic Protection: The LI trip mechanism offers reliable protection against both gradual overloads and instantaneous short-circuit faults.
• Industrial-Grade Interrupting Capacity: Rated at 18kAIC @ 480V, suitable for most commercial and light industrial distribution systems.
• Genuine Square D (Schneider Electric): Manufactured to IEC and UL standards, backed by Schneider Electric's global engineering reputation.
• Drop-In Replacement: Direct replacement for existing FA34025 breakers in Square D I-Line panelboards.

Compatible Applications

The Square D FA34025 is engineered for use in:

• Three-phase industrial motor branch circuits
• Commercial HVAC and mechanical equipment panels
• Manufacturing and process control distribution boards
• Square D I-Line panelboards and switchboards
• MRO replacement and panel upgrade projects

Condition & Availability

Available in New condition. SKU: FA34025-N. In-stock and ready to ship. All products sold by Alpha Brokers & Controls are inspected and verified before shipment.

Frequently Asked Questions

What does FA34025 mean?

The Square D part number FA34025 breaks down as follows: FA = FA-frame series, 3 = 3-pole, 4 = 480V voltage class, 025 = 25-amp current rating. This naming convention is consistent across Square D's MCCB FA-frame lineup.

What panelboards are compatible with the FA34025?

The FA34025 uses an I-Line plug-in connection, making it compatible with Square D I-Line panelboards and switchboards that accept FA-frame breakers. Always verify your panel's buswork rating and frame compatibility before installation.

What is the interrupting rating of the FA34025?

The FA34025 has an interrupting rating of 18kAIC at 480V AC, suitable for most commercial and light industrial distribution applications.

Is the FA34025 a thermal-magnetic breaker?

Yes. The FA34025 uses a thermal-magnetic trip mechanism with LI (Long-time and Instantaneous) trip functions — providing protection against both sustained overloads and sudden short-circuit faults.

Can the FA34025 replace an existing Square D circuit breaker?

Yes, the FA34025 is a direct drop-in replacement for existing FA34025 breakers installed in Square D I-Line compatible panelboards. Always verify the existing panel specs and consult a licensed electrician for replacement work.