Siemens | NGB2K045B | Circuit Breaker | 45A | 2-Pole | Bolt-On

Siemens NGB2K045B Circuit Breaker is a purpose-built protection device rated at 45A, with a 2-Pole configuration and bolt-on mounting. Designed for maintenance, retrofit, and replacement tasks, this exact-fit breaker ensures your electrical system remains safeguarded with a trusted Siemens component.

Designed to be the precise replacement when the part number NGB2K045B is required. By choosing the exact part number, you minimize guesswork and ensure your panel accepts the device without custom adapters or modifications.

• Amperage: 45A
• Poles: 2-Pole
• Mounting: Bolt-On
• Part reference: NGB2K045B

Why it matters: In electrical panels, exact-fit breakers reduce installation time and ensure consistent protection. The NGB2K045B is positioned for fast, secure mounting in compatible Siemens panels, helping you maintain code compliance and reliable circuit protection.

Ideal for electricians, facility managers, and DIY professionals performing panel maintenance or upgrades who need a trustworthy Siemens replacement that matches existing specs.

Use cases include:

• Maintenance on existing Siemens panels that require NGB2K045B
• Retrofit projects where a like-for-like 45A, 2-pole breaker is needed
• Replacement after a component failure to restore protected circuits quickly

Tips for ensuring a correct fit: Always verify the panel model and the ratings before ordering. The part number is the best reference for compatibility, and matching ratings (amperage and pole count) ensure proper protective performance.