Siemens NGB3B045 45A 3P Circuit Breaker, Bolt-On | AmpState

Meet the Siemens NGB3B045 45A 3P Bolt-On Circuit Breaker—the trusted protection solution for panelboards, load centers, and electrical distribution networks. This 3-pole unit delivers reliable overcurrent protection tailored for multi-phase circuits, engineered for straightforward bolt-on mounting to speed up installation and ensure a secure, vibration-resistant fit. A smart choice from AmpState for maintenance teams, panel builders, and spare inventory where a direct part-number match matters.

Key specifications

• Manufacturer: Siemens
• Part Number: NGB3B045
• Product Type: Circuit Breaker
• Amperage: 45 A
• Poles: 3
• Mounting: Bolt-On
• Availability: AmpState

Why this Siemens NGB3B045 stands out

Designed for direct, dependable installation in multi-phase electrical systems, the NGB3B045 combines precise 45-amp protection with a robust bolt-on mounting approach. Its 3-pole configuration protects all phases of a 3-phase circuit, helping maintain electrical reliability and system uptime. Because it’s a Siemens part, it’s built to align with Siemens panelboards and distribution equipment, reducing compatibility guesswork and saving valuable setup time.

Ideal use cases

• Maintenance and repair projects where a precise part-number match is required
• Panel builders assembling new electrical distribution solutions
• Spare inventory for service teams needing ready-to-install breakers
• Replacement in existing Siemens-based installations needing reliable 3-pole protection

Compatibility and support

For teams uncertain about fit, AmpState offers assistance to confirm compatibility and ensure you’re selecting the exact NGB3B045 match for your panel or distribution setup. If you need help matching this part number or verifying fit, simply reach out and we’ll guide you through the confirmation process.

Practical tips for use and stocking

• Keep a dedicated spare for Siemens panelboards and load centers to minimize downtime during maintenance
• Use this 3-pole bolt-on breaker where a reliable, straightforward installation is valued over clip-on alternatives
• Document the exact part number (NG B3B045) and amperage (45 A) in your asset inventory to simplify future replacements

Choose the Siemens NGB3B045 45A 3P Bolt-On Circuit Breaker from AmpState for precise fit, dependable protection, and streamlined installation in industrial and commercial electrical distributions.