Siemens | HLD63B350 | Circuit Breaker | 350A | 3-Pole | 600V

The Siemens HLD63B350 circuit breaker is a robust solution for safeguarding 600V three-phase power in industrial panels. This 350A, three-pole unit is designed for maintenance, retrofit, and replacement projects where exact specs matter.

Key specs at a glance

• Amperage: 350A
• Poles: 3-Pole
• Voltage: 600V
• Part number: HLD63B350

The HLD63B350 shines in environments that demand dependable, high-current protection for 3-phase systems. Built to integrate with Siemens panels and distribution gear, this breaker helps you maintain electrical safety and minimize downtime when loads surge or faults occur.

Ideal use cases

• Maintenance and service upgrades on 600V, three-phase installations.
• Direct replacements or retrofits in Siemens-compatible gear without altering downstream equipment.
• New or upgraded motor feeder circuits and heavy equipment controllers that require 350A protection.

Why choose this Siemens breaker

• Exact compatibility: The HLD63B350 is the best reference for matching Siemens replacements; confirm fit and ratings before ordering to avoid compatibility issues.
• High-current capability: 350A capacity suits demanding loads such as motors, compressors, and other industrial drive equipment.
• Three-pole, 600V design: Specifically engineered for three-phase distribution in industrial environments, helping protect both equipment and personnel.

Practical notes for procurement and installation: ensure the panel and bus configuration align with the HLD63B350’s mounting and electrical characteristics. Keep the original part number handy as your primary reference when verifying compatibility, and have a qualified technician confirm ratings and safe installation practices before energizing the system.