Siemens | HGB3K045B | Circuit Breaker | 45A | 3-Pole | 480V

Siemens HGB3K045B is a purpose-built three-pole circuit breaker designed to protect 3‑phase electrical circuits in demanding industrial and commercial environments. With a 45A rating and a 480V operating capacity, this unit delivers reliable, clear-cut protection for equipment, wiring, and personnel in modern power distribution setups.

Key benefits that matter in real-world use

• 45A protection for 3‑phase circuits: Precisely calibrated to guard feeders and motors in 480V systems without nuisance trips.
• Three-pole design: Simultaneous isolation of all hot legs minimizes arc exposure and ensures complete shutdown during faults.
• Exact compatibility reference: The part number HGB3K045B is the best reference when confirming replacement fit and electrical ratings.
• Maintenance, retrofit, and replacement ready: A dependable choice for updating aging panels or swapping in a like-for-like Siemens component to maintain system integrity.
• Industrial-grade reliability: Built to withstand the rigors of busy electrical environments while delivering consistent protective performance.

Fit, compatibility, and installation considerations

Before ordering, verify that your equipment or panel requires a Siemens HGB3K045B with 45A, 3‑pole, 480V ratings. The part number is the most reliable compatibility reference for cross‑checking against schematics, panel catalogs, and maintenance manuals. When installing, follow standard electrical codes and Siemens installation guidelines to ensure proper wiring, secure connections, and safe operation.

Ideal use cases

• Retrofit projects on industrial control panels needing exact Siemens replacements for 3‑phase 480V systems.
• Maintenance swaps to restore protection on circuits powering motors, drives, or processing equipment.
• Replacement of legacy breakers in facilities upgrading reliability and compliance without altering overall wiring schemes.
• New installations in environments that standardize on Siemens H‑series or compatible 3‑pole breakers for clear part traceability.

What you get

Siemens HGB3K045B circuit breaker — a robust 3‑pole, 45A unit rated for 480V, ready to support dependable protection for your 3‑phase distribution. Use it where precise Siemens specifications are required for safety, performance, and long-term service life.