Square D FA36045 Molded Case Circuit Breaker | I-Line Plug-In | 45A 3-Pole 600V
Square D FA36045 Molded Case Circuit Breaker | I-Line Plug-In | 45A 3-Pole 600V
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Square D FA36045 – 45 Amp 3-Pole 600V I-Line Molded Case Circuit Breaker
The Square D FA36045 is a heavy-duty thermal magnetic molded case circuit breaker (MCCB) engineered for reliable overcurrent and short-circuit protection in demanding industrial and commercial power distribution systems. With a 45-amp continuous rating, 3-pole configuration, and 600-volt maximum voltage, this breaker is purpose-built for three-phase electrical panels using Square D's I-Line plug-in bus system.
Sourced by Alpha Brokers & Controls, the FA36045 is available in new condition and ships ready for immediate deployment — ideal for MRO procurement, panel upgrades, and critical infrastructure replacements.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Square D (Schneider Electric) |
| Part Number | FA36045 |
| SKU | FA36045-N (New) |
| Ampere Rating | 45A |
| Number of Poles | 3-Pole |
| Voltage Rating | 600V AC / 250V DC |
| Breaker Type | Molded Case Circuit Breaker (MCCB) |
| Trip Type | Thermal Magnetic |
| Trip Functions | Long Time & Instantaneous |
| Connection Type | I-Line Plug-In |
| Interrupting Rating – 120/240V AC | 25 kAIC |
| Interrupting Rating – 277/480V AC | 18 kAIC |
| Interrupting Rating – 347/600V AC | 14 kAIC |
| Interrupting Rating – 250V DC | 10 kAIC |
| Series | FA (I-Line) |
| Condition | New |
What Is the Square D FA36045?
The FA36045 belongs to Square D's FA-frame I-Line series — a line of molded case circuit breakers specifically designed to plug directly into Square D I-Line panelboards and switchboards without the need for bolt-on connections. This plug-in design significantly reduces installation time, simplifies panel maintenance, and ensures a consistent, secure electrical connection every time.
The thermal magnetic trip mechanism provides dual-mode protection: long-time thermal protection guards against sustained overloads, while instantaneous magnetic protection responds immediately to dangerous short-circuit faults — protecting equipment, wiring, and personnel.
Why Choose the FA36045?
- I-Line Plug-In Convenience: Tool-free installation on compatible Square D I-Line bus systems — no bolt-on required.
- Wide Voltage Range: Rated for up to 600V AC, covering the full range of North American industrial voltages including 208V, 240V, 480V, and 600V three-phase systems.
- Dual Trip Protection: Thermal magnetic design protects against both overloads and short circuits simultaneously.
- Proven Square D Reliability: Engineered by Schneider Electric, one of the world's leading electrical equipment manufacturers, to UL 489 standards.
- New Condition: Ships as new — full service life, no derating required.
- Fast Availability: In-stock at Alpha Brokers & Controls for prompt fulfillment.
Compatible Applications
- Square D I-Line panelboards and switchboards
- Industrial motor branch circuit protection (up to 45A)
- Commercial HVAC and mechanical equipment panels
- Three-phase power distribution centers
- Manufacturing facility power panels
- Data center and critical infrastructure electrical systems
- Panel upgrades and MRO (Maintenance, Repair & Operations) replacement
Frequently Asked Questions
What does FA36045 mean?
The part number breaks down as follows: FA = FA-frame I-Line series, 3 = 3-pole, 6 = 600V rated, 045 = 45-amp rating. It is a Square D thermal magnetic molded case circuit breaker with I-Line plug-in termination.
Is the FA36045 the same as a bolt-on breaker?
No. The FA36045 uses Square D's I-Line plug-in connection, which installs directly onto the I-Line bus without bolts. It is not interchangeable with standard bolt-on breakers. Verify your panelboard is an I-Line-compatible model before ordering.
What is the interrupting rating of the FA36045?
The FA36045 carries interrupting ratings of 25 kAIC at 120/240V AC, 18 kAIC at 277/480V AC, 14 kAIC at 347/600V AC, and 10 kAIC at 250V DC.
What panelboards is the FA36045 compatible with?
The FA36045 is compatible with Square D I-Line panelboards and switchboards that accept FA-frame plug-in breakers. Common compatible lines include Square D NF, I-Line, and certain PowerPact enclosures. Always verify frame and bus compatibility with your specific panel model.
Does this breaker come new or refurbished?
Alpha Brokers & Controls offers the FA36045 in new (FA36045-N) condition, ensuring full rated service life with no prior usage.