Westinghouse | 505C220G22 | Circuit Breaker | 300A | 3-Pole | 600V | Bolt-On

When you’re maintaining or upgrading a high-demand electrical system, you need a circuit breaker that fits precisely and performs reliably. The Westinghouse 505C220G22 300A 3-Pole 600V Bolt-On Circuit Breaker is engineered for demanding panels, delivering solid overcurrent protection and dependable operation in retrofit, maintenance, or replacement projects.

What makes this circuit breaker stand out

Designed for exact compatibility with legacy Westinghouse installations, this unit brings the assurance of a trusted brand and a bolt-on mounting style that provides a secure, vibration-resistant connection. It’s built to support large-load circuits and tough industrial environments where reliable interruption and clear electrical protection are non-negotiable.

Key specifications

• Amperage: 300A
• Poles: 3-Pole
• Voltage rating: 600V
• Mounting style: Bolt-On
• Part reference: 505C220G22

Ideal use cases

• Retrofits and replacements in commercial or industrial panels that require a 3‑pole, 600V, 300A bolt-on breaker
• Maintenance upgrades where matching the exact part number ensures compatibility with existing bus bars and mounting footprints
• Panel upgrades for large-motor or high-load equipment where secure, vibration-resistant protection is essential

Compatibility and installation notes

Before ordering, confirm fit and ratings against your panel requirements. The part number 505C220G22 is the best reference for compatibility, ensuring the breaker matches your existing bus configuration and protection needs. Bolt-on breakers like this one typically require appropriate mounting hardware and panel design that accommodates bolt-on connections, delivering a rigid mechanical hold and consistent electrical contact.

Practical tips and guidance

• Keep a spare 505C220G22 on hand for planned maintenance or stocking replacements in high-demand facilities.
• Document the exact part number within your maintenance logs to simplify future replacements and panel audits.
• When performing upgrades, verify that the panel’s enclosure, bus bar configuration, and conductor sizing align with a 300A, 3‑pole, 600V bolt-on device.
• Label the breaker clearly in your electrical drawings to avoid confusion during future servicing or panel retrofits.

With its precise specification fit, robust bolt-on mounting, and the proven reliability of Westinghouse, this 505C220G22 circuit breaker is a practical, future-ready choice for maintaining safe, continuous operation in demanding electrical environments.