Siemens | JD22B300L | Circuit Breaker | 300A | 2-Pole | 240V | Bolt-On

Meet the Siemens JD22B300L circuit breaker—a purpose-built protection device designed for serious electrical demands. This 300A, 2-pole unit provides true, simultaneous disconnection on a 240V circuit, making it a reliable choice for maintenance, retrofit, and replacement projects where exact specs matter.

Who benefits from this breaker? electricians, facilities managers, and electrical contractors tackling panel upgrades or servicing legacy infrastructure. The JD22B300L is purposefully designed for bolt-on mounting in compatible panels, delivering solid protection where high-current, two-pole disconnects are required in commercial and light industrial settings.

• Amperage: 300A
• Poles: 2-Pole
• Voltage: 240V
• Mounting: Bolt-On

Why choose this Siemens breaker over alternatives? Its bolt-on design offers a secure, vibration-resistant installation that helps ensure reliable performance in panels that support bolt-on protection devices. The JD22B300L is specifically identified by its part number, making compatibility checks straightforward for the right panel family and bus arrangement.

Important compatibility note: use the JD22B300L part number as your best reference when matching to panels and bus configurations. Confirm fit and ratings before ordering to avoid mismatches and to ensure your protection strategy aligns with your system’s electrical requirements.

Practical use cases include upgrading service disconnects in commercial panels, replacing aging high-current breakers in retrofit projects, and provisioning reliable fault protection for dedicated 240V circuits that demand robust, single-unit protection. Whether you’re refreshing a panel in a data-infrastructure room or upgrading a heavy-load feeder, this Siemens breaker provides a dependable, high-capacity solution that helps you stay ahead of electrical maintenance needs.