Siemens | BQ3B045L | Circuit Breaker | 45A | 3-Pole | 240V

Siemens BQ3B045L is a purpose-built circuit breaker designed to protect 3-pole, 240V circuits with a 45A rating. Built for maintenance, retrofit, and replacement projects, this unit delivers reliable protection where exact specifications matter.

Key specifications at a glance

• Amperage: 45A
• Poles: 3-Pole
• Voltage: 240V

Why choose the BQ3B045L

This model stands out for its precise specification alignment with Siemens systems. When your goal is a seamless cross-reference and dependable performance, the BQ3B045L provides a clear, consistent fit for 3-pole, 240V protection. The part number itself—BQ3B045L—serves as the most reliable reference to confirm compatibility, reducing guesswork during replacements or retrofits.

Use cases and practical scenarios

• Maintenance scenarios where a 3-pole, 240V, 45A protection device is required to restore circuit reliability.
• Retrofit projects that demand an exact part number match to ensure smooth panel integration.
• Replacement of aging or faulty breakers in compatible Siemens electrical systems, minimizing downtime with a ready-to-order component.

Installation and compatibility tips

Before ordering, verify fit and ratings for your specific setup. The best reference for compatibility is the part number itself—BQ3B045L. Ensure your panel accepts a 3-pole, 240V, 45A breaker of this type, and confirm mounting and terminal configurations match your existing installation. Keeping a spare on hand can streamline service calls and help maintain uninterrupted service.

Designed for professionals who need a dependable Siemens solution that aligns precisely with their 3-phase or 240V protection requirements, the BQ3B045L delivers straightforward installation and predictable performance when exact specifications are essential.