Siemens | HQJ3B100HA01 | Circuit Breaker | 100A | 3-Pole | 240V | Bolt-On

Siemens HQJ3B100HA01 Circuit Breaker is a 100-amp, 3-pole device designed for 240-volt, three-phase systems. Built for maintenance, retrofit, and replacement work, this bolt-on breaker delivers dependable protection in compatible Siemens panels while keeping installation straightforward and secure.

What makes this breaker a smart choice

• Amperage: 100 A — suited for protecting medium- to high-load circuits common in commercial and industrial settings.
• Poles: 3-Pole — ideal for three-phase feeders and equipment such as motors, compressors, and HVAC systems.
• Voltage: 240V — designed for standard three-phase distribution in many commercial applications.
• Mounting: Bolt-On — provides a sturdy, vibration-resistant connection in compatible enclosures, simplifying replacement and retrofit work.

Compatibility and correct fit

• Part number HQJ3B100HA01 is the best reference for compatibility. Always confirm fit and ratings against your panel specifications before ordering.
• Specifically intended for Siemens panels that accept HQJ-style bolt-on breakers, making it a reliable replacement option when updating or expanding 3-phase circuits.

Use cases and practical applications

• Retrofit or expand existing 3-phase electrical enclosures in office buildings, data centers, equipment rooms, and manufacturing spaces.
• Protection for large motors, compressors, conveyors, and other 3-phase loads that operate on 240V.
• Maintenance replacements to restore reliable overcurrent protection without changing the panel architecture.

Why it matters in real-world terms

• Reliable overcurrent protection tailored to 240V three-phase systems helps prevent equipment damage and reduces the risk of costly downtime.
• The bolt-on design provides a robust mechanical connection that stands up to vibrations and frequent maintenance access typical in commercial environments.
• Using the exact part reference HQJ3B100HA01 minimizes guesswork during replacements, streamlining procurement and installation.

Tips for installers and maintainers

• Verify compatibility by cross-referencing the panel model and bus type with the HQJ series before ordering.
• During installation, follow torque specifications for the mounting bolts and ensure secure electrical connections to maintain dependable protection.
• Keep a spare HQJ3B100HA01 on hand for planned replacements or future retrofits to minimize panel downtime.