Square D HDA36125 - 125 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters, the Square D HDA36125 delivers robust 125A, 600V protection in a compact, plug-in package. This 3-pole molded case circuit breaker is built to streamline serviceability and reliability in demanding commercial, light industrial, and residential environments.

• Fast plug-in connection for quick installation and effortless replacement, minimizing panel downtime during upgrades or maintenance.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across varying loads and ambient conditions, helping prevent nuisance trips while safeguarding circuits.
• OEM-loadcenter compatibility designed to integrate smoothly with matching Square D panelboards and loadcenters, reducing compatibility concerns and stocking requirements.
• Three-pole operation ensures simultaneous disconnection of all poles, delivering reliable protection for multi-phase circuits common in commercial and light industrial setups.
• Molded case, plug-in design combines rugged protection with straightforward field replacement, supporting faster service and long-term durability.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: HDA36125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from the HDA36125?

• Facilities upgrading to more reliable protection in panelboards and load centers where 3-phase circuits are prevalent.
• Electrical contractors and service teams seeking fast, low-downtime replacements during panel maintenance or expansion projects.
• Residential, commercial, and light industrial environments that require a proven, plug-in solution with consistent trip characteristics.

Why this model stands out in its category

• Distinctive plug-in capability minimizes on-site wiring complexity while accelerating installation and replacement workflows.
• The thermal-magnetic trip unit offers dependable response to both overload conditions and short-circuit events, helping protect feeders and downstream equipment without excessive nuisance trips.
• Designed for seamless alignment with matching OEM loadcenters, reducing compatibility risk and streamlining panel inventories.

Practical use tips: install only in compatible panelboards/loadcenters, follow all applicable electrical codes, and consult a qualified electrician for installation and safety compliance. For environments ranging from office buildings to light manufacturing facilities, the Square D HDA36125 provides a reliable, easy-to-service solution that keeps critical electrical systems protected and ready to operate.