Square D HRA36100U33X - 100 A, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D HRA36100U33X is a 100 A, three-pole, plug-in molded case circuit breaker engineered to protect panelboards and load centers from overcurrent and short-circuit events. Designed for fast installation and straightforward replacement, this unit keeps your electrical system secure with minimal downtime.

• Fast plug-in connection: enables quick installation and effortless replacement, reducing service time and panel downtime.
• Thermal-magnetic trip unit: delivers stable, repeatable protection by responding to both overloads and short circuits, helping safeguard wiring and connected equipment.
• Three-pole configuration: supports three-phase circuits, ideal for commercial and light industrial applications, while remaining compatible with residential panel setups when required by the system.
• OEM-compatible: designed to work with matching Square D OEM load centers and panelboards, simplifying upgrades and serviceability.
• Versatile protection: purpose-built for branch circuit overcurrent and short-circuit protection across a range of applications—from homes to small-to-mid sized commercial spaces.

Technical details

• Manufacturer: Square D
• Part number: HRA36100U33X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100 A
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and installation scenarios

Ideal for upgrading or expanding panels in residential, commercial, and light industrial settings. Use this breaker to protect multi-phase equipment, motors, and lighting circuits in compatible Square D panelboards. Its quick-connect plug-in design simplifies field replacements, making it a practical choice for maintenance teams and electrical contractors. With a 100 A rating, it provides robust protection for mid-size branch circuits, service panels, and distribution panels where reliable trip performance is essential.