Square D HDA36150SR 150A 600 V Circuit Breaker

Protect high-demand circuits with a trusted name in electrical safety—the Square D HDA36150SR circuit breaker. Built to deliver reliable overcurrent protection in demanding panels, this unit helps safeguard wiring, devices, and occupants from the damaging effects of overloads and short circuits.

Part Number HDA36150SR specifies a 150-amp current rating and a 600-volt maximum rating, making it a robust choice for service equipment and feeders in residential, commercial, or light industrial environments. When installed in compatible Square D panels, it provides consistent performance and compatibility with the broader Square D protection ecosystem.

Key specifications

• Current rating: 150 A
• Voltage rating: 600 V
• Model/Part number: HDA36150SR
• Brand: Square D

Why this matters for your electrical system

With a 150 A protection threshold, this breaker supports substantial branch circuits and feeders while maintaining dependable interruption under fault conditions. The 600 V rating expands its applicability to higher-voltage installations, providing a versatile option for panels that service larger loads. Built for long-term reliability, it contributes to safer operation by quickly interrupting excessive current before wiring insulation degrades or connected equipment is damaged.

Ideal use cases

• Upgrading or replacing aging breakers in Square D panels that require 150 A protection for feeders or main disconnects
• Installing in commercial or multi-family residential panels where higher amperage protection is needed
• Systems operating within the 600 V range that demand robust, code-compliant overcurrent protection

Installation and practical considerations

• Ensure compatibility with your Square D panel family and existing protection scheme
• Follow all applicable electrical codes and safety practices during replacement or installation
• For optimal reliability, verify proper seating and secure lug connections as per manufacturer guidelines
• Keep the part on hand for proactive maintenance and quick replacements to minimize system downtime

Whether you’re equipping a new distribution panel, upgrading a service entry, or replacing a worn outlet with a dependable 150 A/600 V solution, the Square D HDA36150SR delivers decisive protection with proven reliability. Invest in a breaker that aligns with your power needs and the Square D protection ecosystem for safer, more predictable electrical performance.