Siemens | HED41B045 | Circuit Breaker | 45A | 1-Pole | 277V

Siemens HED41B045 is a purpose-built circuit breaker designed for 277V systems, delivering reliable overcurrent protection in a compact 1-pole package. With a 45A rating, this unit is ideal for feeding critical residential and commercial circuits where dependable protection and precise trip characteristics matter during maintenance, retrofit, or replacement projects.

• Amperage: 45A
• Poles: 1-Pole
• Voltage rating: 277V
• Part reference: HED41B045

What sets this Siemens breaker apart is its exacting spec alignment for 277V circuits and its status as a true OEM replacement part. This means fewer compatibility questions on the job site and a more straightforward swap for systems that require the HED41B045 designation. If you’re maintaining or upgrading panels and feeders in commercial or industrial environments with 277V distribution, this unit provides the reliable protection you expect from Siemens.

Ideal use cases

• Maintenance and retrofit projects in commercial buildings with 277V distribution
• Replacement for existing Siemens installations that specify HED41B045
• Feeder protection for lighting, HVAC, or other 277V circuits that require a 45A limit

Compatibility and installation notes

Before ordering, confirm fit and ratings on your panel label. The part number is the best reference for compatibility, helping you avoid mismatches in amperage, voltage, or mounting configuration. When installing, follow standard safety practices: power down the system, verify absence of voltage, and torque connections to the manufacturer’s specifications for the panel in use.

Designed for reliability and straightforward integration, the Siemens HED41B045 helps minimize downtime during service and ensures continuous protection for your 277V circuits. It’s the precise, purpose-made choice for professionals who demand exact specs, documented compatibility, and dependable performance in demanding electrical environments.