Square D FH36025 Circuit Breaker | 25A 3-Pole 600V I-Line Molded Case

Square D FH36025 – 25 Amp 3-Pole 600V Molded Case Circuit Breaker (I-Line Plug-In)

The Square D FH36025 is a heavy-duty, industrial-grade molded case circuit breaker (MCCB) engineered for reliable overcurrent protection in demanding commercial and industrial power distribution systems. With an I-Line plug-in connection, this breaker installs directly into Square D I-Line panelboards without additional wiring hardware — making replacement and maintenance faster and more cost-effective.

What Is the Square D FH36025?

The FH36025 is a thermal-magnetic, 3-pole molded case circuit breaker manufactured by Square D (Schneider Electric). It is rated for 25 Amperes at up to 600 Volts AC, making it suitable for three-phase industrial applications including motor branch circuits, feeder protection, and panel distribution in manufacturing facilities, commercial buildings, and utility infrastructure.

Key Specifications

• Part Number: FH36025
• Manufacturer: Square D / Schneider Electric
• Ampere Rating: 25A
• Number of Poles: 3-Pole
• Voltage Rating: 600 VAC
• Interrupting Rating: 25 kAIC @ 480V
• Trip Type: Thermal-Magnetic (LI – Long-time & Instantaneous)
• Connection Type: I-Line Plug-In
• Frame: F-Frame
• Application: Industrial & Commercial Power Distribution

Why Choose the I-Line Plug-In Design?

Square D's I-Line plug-in technology allows the FH36025 to connect directly into compatible Square D I-Line panelboards with a simple plug-in motion — no bus bar bolts required. This significantly reduces installation time and minimizes the risk of loose connections. It's the preferred solution for facilities that require frequent breaker changes, load rebalancing, or fast maintenance turnaround.

Thermal-Magnetic Trip Technology

The FH36025 uses thermal-magnetic trip technology with two protection functions:

• Long-Time (L): Provides sustained overload protection by responding to heat buildup over time — ideal for protecting wiring and equipment from damage caused by persistent low-level overloads.
• Instantaneous (I): Immediately trips the breaker during high-magnitude short-circuit faults, protecting downstream equipment from catastrophic damage.

Typical Applications

• Three-phase motor branch circuit protection
• Feeder and sub-feeder circuit protection
• Industrial manufacturing facilities
• Commercial buildings and data centers
• Utility and infrastructure power panels
• Replacement for aging or tripped Square D F-Frame breakers

Compatibility

The FH36025 is designed for use with Square D I-Line panelboards and switchboards. Always verify panel compatibility before installation. This breaker replaces older or identical Square D FH-frame models in I-Line systems. Consult your panel documentation or a licensed electrician if unsure about compatibility.

Condition

Available as New (SKU: FH36025-N). All units are inspected and verified before shipment.

Need a different amperage or pole configuration? Contact us — we stock a wide range of Square D I-Line and thermal-magnetic circuit breakers for industrial and commercial applications.