Square D FH36020 Molded Case Circuit Breaker – 20A 3-Pole 600V I-Line Plug-In | F-Frame MCCB

Square D FH36020 – 20A 3-Pole 600V Molded Case Circuit Breaker (I-Line Plug-In)

The Square D FH36020 is a heavy-duty, thermal-magnetic molded case circuit breaker (MCCB) engineered for dependable overcurrent and short-circuit protection in commercial and industrial power distribution systems. Part of Square D's F-Frame I-Line series by Schneider Electric, this 3-pole, 20-amp breaker delivers consistent, code-compliant protection across three-phase 600VAC applications.

Its I-Line plug-in mounting enables fast, tool-assisted installation into compatible Square D I-Line panelboards and switchboards — minimizing downtime during installation, maintenance, or replacement in live electrical environments.

Key Specifications

• Catalog Number: FH36020
• Manufacturer: Square D / Schneider Electric
• Ampere Rating: 20A
• Number of Poles: 3-Pole (Three-Phase)
• Voltage Rating: 600VAC
• Frame: F-Frame
• Trip Type: Thermal-Magnetic (LI – Long-Time & Instantaneous)
• Mounting Style: I-Line Style Plug-In
• Interrupting Capacity: 65 kA @ 240V | 25 kA @ 480V | 18 kA @ 600V
• Operating Temperature: 40°C
• Frequency: 50/60 Hz
• Standards: UL Listed, CSA Certified
• Condition: New (SKU: FH36020-N)

What Is the Square D FH36020?

The FH36020 is an F-Frame molded case circuit breaker designed for three-phase industrial and commercial power systems operating at up to 600 volts AC. It uses a dual-function thermal-magnetic trip mechanism that responds to sustained overloads via long-time protection and instantaneous short-circuit faults — providing two layers of protection for equipment, wiring, and personnel.

Why Choose the I-Line Plug-In Design?

The I-Line plug-in format is a hallmark of Square D's modular panel system. It allows circuit breakers to be safely installed and removed from energized I-Line panelboards with minimal tools and effort — a critical advantage in industrial maintenance environments where avoiding downtime is essential. No bus bar connections to torque, no additional hardware.

Typical Applications

• Industrial motor branch circuit protection
• Commercial and industrial electrical distribution panels
• Manufacturing and process control equipment
• HVAC systems and mechanical equipment feeders
• Data centers and critical power infrastructure
• Square D I-Line panelboard and switchboard systems

Compatibility & Replacement Information

The FH36020 is compatible with Square D I-Line style panelboards and switchboards. For newer installations, this model has been superseded by the BGA36020 or HGA36020. Contact our team to confirm compatibility with your existing panel configuration before ordering.

Condition & Quality Assurance

This unit is sold as New (SKU: FH36020-N). Each breaker is inspected prior to shipment by our team at Alpha Brokers & Controls to ensure full operational integrity and proper packaging.

Frequently Asked Questions

What does FH36020 mean?
The FH36020 catalog number breaks down as follows: F = F-Frame, H = 600V rated, 3 = 3-pole, 6 = 600V class, 020 = 20 amp rating. It is manufactured by Square D (Schneider Electric).

Is the FH36020 still in production?
The FH36020 has been superseded by newer Square D models such as the BGA36020 or HGA36020. However, new units remain available through authorized distributors and specialty electrical brokers like Alpha Brokers & Controls.

What panelboards is the FH36020 compatible with?
The FH36020 is designed for use with Square D I-Line style panelboards and switchboards. Verify your panel's bus system before installing.

What is the interrupting rating of the FH36020?
The FH36020 has an interrupting capacity of 65 kA at 240V, 25 kA at 480V, and 18 kA at 600V — meeting the demands of most commercial and light industrial short-circuit scenarios.

Sold by Alpha Brokers & Controls — your trusted source for new, hard-to-find, and industrial-grade electrical components.