Siemens | HF3B100 | Circuit Breaker | 3-Pole

Siemens HF3B100 3-Pole Circuit Breaker — a dependable, purpose-built solution for maintenance, retrofit, and replacement projects where exact specifications matter. This 3-Pole unit is designed to protect and coordinate three-phase electrical systems, helping keep equipment and personnel safe while minimizing downtime.

Why choose the HF3B100 for your project?

• 3-Pole configuration supports standard three-phase protection, ensuring all three phases trip together for safe, coordinated shutdown during faults.
• Part number HF3B100 serves as the definitive reference for compatibility, giving you confidence that the form factor, mounting, and electrical interface align with your Siemens-compatible panel.
• Maintenance, retrofit, and replacement ready — ideal for updating aging panels, adding newer protection, or carrying a ready-to-go spare for quick service calls.
• Compatibility-focused approach — verify fit and ratings before ordering, using the HF3B100 as your primary reference to ensure seamless integration into your existing system.

How this 3-Pole breaker fits into your system

In three-phase installations, this Siemens breaker delivers reliable protection across all conductors, coordinating with upstream devices to interrupt power safely when faults occur. Its design supports standard panel layouts that require 3-pole protection, making it a straightforward upgrade or replacement in compatible Siemens environments.

Ideal for

• Facilities teams performing routine maintenance on Siemens panel fleets
• Retrofit projects updating legacy systems to Siemens-compatible protection
• Replacement planning to minimize downtime with exact, in-spec components

Practical guidance for ordering and installation

• Before ordering, confirm fit and ratings for your specific panel and application. The HF3B100 is your best compatibility reference.
• Ensure your distribution panel supports 3-pole breakers and that the physical mounting and bus interface match your setup.
• For installers, follow standard electrical safety practices and consult your panel’s documentation to verify trip characteristics and conductor sizing requirements.