Siemens HFD63B110L - 110 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HFD63B110L is a robust 110A, 600V, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers with reliability you can count on. Built for steady performance in daily electrical demand, it provides precise, repeatable protection while standing up to the vibrations and stresses of real-world installations.

Why this breaker stands out

• Secure bolt-on mounting: Engineered for a rigid, vibration-resistant bus connection that stays tight under operation, reducing the risk of loose terminations and intermittent trips.
• Thermal-magnetic trip unit: Combines precise thermal sensing with fast magnetic response for dependable protection against both overloads and short circuits, helping to safeguard wiring and connected equipment.
• OEM-compatible: Designed to be compatible with matching Siemens OEM load centers and panelboards, making upgrades or replacements straightforward without compatibility concerns.
• Three-pole design: Delivers balanced protection across all phases, ideal for 3-phase electrical systems common in commercial and light industrial applications.
• Versatile rating: 110A current rating with a 600V maximum rating accommodates a wide range of branch circuits in both residential and commercial environments.
• Rugged molded-case construction: Combines compact size with durable housing to withstand everyday electrical stresses and provide long-term reliability.

Technical snapshot

• Manufacturer: Siemens
• Part Number: HFD63B110L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 110A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Perfect for electricians and panel builders aiming to shield circuits in residential complexes, commercial spaces, and light industrial settings. Use it as a main or sub-feed protective device in Siemens-based panelboards and load centers, where a solid bolt-on connection and reliable trip performance are priorities. Its 3-pole configuration makes it well-suited for three-phase distribution or single-phase systems with a need for coordinated protection across all phases.

Practical guidance and benefits

• Reliability in demanding environments: The bolt-on design minimizes movement and arcing at the bus connection, reducing nuisance trips related to loose terminations in busy electrical rooms.
• Straightforward integration: When upgrading or replacing breakers in OEM panels, the HFD63B110L provides a seamless fit with existing buswork and mounting footprints, eliminating rework.
• Protection you can trust: The dual-mode trip (thermal and magnetic) responds appropriately to sustained overloads and sudden faults, helping to protect conductors, motors, transformers, and other equipment from damage.
• Versatile installation options: Suitable for a range of panelboard configurations, ensuring you can design safer, more efficient distribution systems across different facilities.

Tips for optimal performance

Ensure proper torque on mounting hardware per your panelboard’s guidelines and verify full engagement with the bus bars during installation. Regularly inspect terminations for signs of wear or discoloration, and replace any breaker that shows unusual trips or physical damage. When configuring systems with Siemens OEM panels, prioritize consistency by using HFD63B110L where a three-pole, 110A protective device is required for balanced, reliable protection across all phases.