Square D HDA36045 - 45 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HDA36045 is a 45A, 600V, 3-pole plug-in molded case circuit breaker engineered for reliable branch circuit protection in panelboards and load centers. Its fast plug-in connection simplifies installation and replacement, helping you minimize downtime during panel upgrades or service work.

• Plug-in convenience: Quick, tool-efficient mounting into compatible OEM panelboards, reducing installation time and field labor.
• Thermal-magnetic trip unit: Combines precise overload protection with rapid short-circuit interruption for stable, repeatable protection performance across operating conditions.
• Three-pole, 600V design: Ideal for three-phase systems and higher-voltage distribution in commercial and light industrial environments, while still suitable for certain residential panel configurations that require three poles.
• OEM compatibility: Designed to align with matching Square D load centers and panelboards, ensuring a reliable fit and consistent electrical characteristics.
• Versatile application scope: Perfect for protecting branch circuits in residential service panels, commercial distribution panels, and light industrial equipment enclosures.

What this model delivers in real-world use

• Protects motor loads, lighting circuits, and power feeders by stopping fault currents before damage occurs, reducing downtime and equipment wear.
• Provides predictable protection for multi‑circuit panels where a 3-pole configuration is required to maintain balanced three-phase distribution.
• Facilitates quick replacement or retrofitting in existing Square D installations without sacrificing performance or compatibility.

Technical snapshot

• Manufacturer: Square D
• Part Number: HDA36045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 45A
• Voltage rating: 600V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Designed for environments that demand dependable protection with straightforward maintenance, the Square D HDA36045 delivers consistent performance across a range of residential, commercial, and light industrial panel configurations. Whether you're replacing an older unit or outfitting a new installation, this plug-in 3-pole breaker provides the right balance of speed, safety, and compatibility for durable electrical protection.