Siemens | HEB3B045L | Circuit Breaker | 45A | 3-Pole | 240V

Meet the Siemens HEB3B045L—the dependable, three-pole circuit breaker designed for serious 240V, 45A protection. Built to complement Siemens panels and compatible electrical setups, this breaker is the reliable choice for maintenance, retrofit, or replacement projects that demand exact specs and durable performance.

Key specifications

• Amperage: 45 A
• Poles: 3-Pole
• Voltage: 240 V
• Reference part number: HEB3B045L

Why this Siemens breaker stands out

Unlike generic substitutes, the HEB3B045L is engineered to align with Siemens electrical systems, delivering precise trip characteristics and cohesive operation within your panel. Its 3-pole design makes it ideal for protecting 3-phase equipment and large 240V circuits, reducing risk to motors, pumps, and other industrial loads. The exact part reference simplifies compatibility checks and minimizes installation guesswork, helping you avoid mismatched components and extended downtime.

Ideal use cases

• Protect 3-phase motors and industrial equipment in commercial or light industrial environments
• Retrofit aging panels or replace a failing breaker with a direct, same-rating replacement
• Upgrade or maintain 240V circuits in HVAC systems, conveyors, pumps, and other high-demand loads

Installation and compatibility tips

Before ordering, verify fit and ratings directly against your panel’s labeling. The HEB3B045L is presented as a best-reference part number for compatibility, ensuring you’re selecting a breaker that mates correctly with the bus and mounting arrangement. If you’re refreshing a panel, rely on the exact designation to streamline ordering and installation, and consult your electrical code requirements to confirm proper protection for your specific load and environment.