Siemens | BQ3B04500S01 | Circuit Breaker | 45A | 3-Pole | 240V

Siemens BQ3B04500S01 Circuit Breaker is a 45A, 3-Pole, 240V protective device designed for reliable three-phase distribution protection in commercial and industrial panels. Built to the Siemens standard, this breaker integrates seamlessly into compatible Siemens panels and assemblies that require 3-pole protection at 240V.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this model serves as the definitive reference for compatibility. Before ordering, confirm fit and ratings against your panel labeling—the part number BQ3B04500S01 is your best reference to ensure a precise match.

Key specifications at a glance

• Amperage: 45A
• Poles: 3-Pole
• Voltage: 240V
• Reference: Part number BQ3B04500S01
• Compatibility: Siemens panels and distributions requiring a 3-pole, 240V circuit breaker

This is not a generic replacement. It provides a direct-fit solution that aligns with your existing Siemens electrical ecosystem, helping you minimize downtime and ensure consistent protection across your 3-phase system.

Ideal use cases

• Replacing a worn or tripped breaker in Siemens-compatible panels that require 3-pole, 240V protection
• Retrofit projects aimed at restoring three-phase safety and reliability in aging installations
• New equipment setups in environments powered by 240V three-phase circuits using Siemens distribution gear

Practical guidance for your project

• Always verify the exact panel labeling and the 3-pole, 240V configuration before ordering
• Use the exact part number BQ3B04500S01 as the primary compatibility reference to avoid mismatches

Choosing the Siemens BQ3B04500S01 means staying within a trusted, compatible ecosystem engineered for dependable performance in demanding electrical environments. When you need a precise, race-ready fit for your 45A, 3-Pole, 240V circuit protection, this breaker delivers the alignment and reliability your system relies on.