Square D HDA261504 - 150 A, 600 V, 2-Pole Plug-In Circuit Breaker | AmpState

Square D HDA261504 is a rugged 150A, 600V, 2-pole plug-in molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Its fast plug-in connection means quicker installations and easier replacements, reducing downtime on service calls and ongoing maintenance projects.

• Fast plug-in connection enables quick installation and effortless replacement, minimizing panel downtime during upgrades or repairs.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining a thermal overload element with a magnetic trip for fast response to short circuits.
• OEM-compatible design is built to pair with matching Square D load centers and panelboards, ensuring reliable fit and consistent protection without adapters.
• 2-pole construction supports typical 240V circuits and feeder protection, with a robust 150A rating suitable for residential, commercial, and light industrial applications.
• 600V rating provides safe, compliant protection for higher voltage circuits while maintaining compatibility with standard panelboard architectures.

Technical specifications

• Manufacturer: Square D
• Part Number: HDA261504
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 150A
• Voltage Rating: 600V
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading an existing panelboard or load center that accepts HDA series breakers, where quick, tool-free plug-in installation saves time on site.
• Replacing a failed or tripped 2-pole breaker in residential service panels, commercial load centers, or light industrial panels needing reliable protection for 240V circuits.
• Feeding and protecting large branch circuits or feeders in small to mid-size commercial spaces, workshops, or maintenance facilities.
• Installing a robust, OEM-compatible protection device in new builds that require standardized Square D components across multiple panels.

Why this matters: the HDA261504 combines a proven thermal-magnetic trip mechanism with a plug-in format designed for quick service and dependable protection. By selecting a breaker that matches your OEM panel’s design, you minimize cross-compatibility issues and ensure consistent trip characteristics across circuits. This leads to fewer nuisance trips, more predictable performance, and simpler field maintenance—especially valuable in busy residential and light commercial environments where reliability is non-negotiable.

Practical tips for best results: verify that your panelboard accepts plug-in HDA breakers and confirm the bus stabs and space availability before ordering. Use the exact part number when coordinating replacements to ensure proper fit and trip curve alignment with your panel’s design. For any significant electrical work, consult or hire a qualified electrician to ensure safe, code-compliant installation.