Siemens | QJ23B100HA01 | Circuit Breaker | 100A | 3-Pole | 240V | Bolt-On

Designed for exacting replacement and retrofit projects, the Siemens QJ23B100HA01 is a bolt-on, 3-pole circuit breaker rated at 100A and 240V. Built to integrate with compatible Siemens panels, this unit delivers dependable overcurrent protection and straightforward serviceability in demanding commercial or industrial environments.

Key specifications

• Amperage: 100 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Part reference: QJ23B100HA01

Why this model stands out

Unlike generic substitutes, this QJ-series bolt-on breaker is designed to fit specific Siemens panels. The three-pole configuration provides coordinated protection across three-phase equipment, making it suitable for commercial feeders and motor circuits. With a 100A rating, it protects equipment from overloads and short circuits without nuisance tripping in typical load profiles. Bolt-on mounting offers secure mechanical attachment and quicker field replacement, reducing downtime during electrical maintenance.

Installation and compatibility tips

• Always verify fit and ratings before ordering. The part number QJ23B100HA01 is the most reliable reference for compatibility.
• Ensure the panel is de-energized and properly isolated before replacement. Follow lockout/tagout procedures.
• Consult the panel's installation guide for the correct torque specs and mounting procedure for bolt-on breakers.
• Use this breaker in environments and panels labeled for Siemens QJ series bolt-on breakers and 240V, three-phase circuits.

Scenarios where it shines

• Retrofits in aging commercial panels where a 3-pole 240V, 100A breaker is required to protect motors or feeders.
• Maintenance replacements to restore original protection scheme without altering panel configuration.
• New installations in small to mid-size commercial spaces with Siemens QJ bolt-on systems.

What to expect in terms of performance and reliability

With Siemens engineering behind it, this breaker delivers consistent trip characteristics aligned with standard electrical protection practice. Its bolt-on design minimizes field wiring complexity by keeping terminals and conductors organized during service changes, which translates into faster maintenance windows and reduced downtime.

Important safety and purchase notes

Always confirm fit and ratings before ordering—using the QJ23B100HA01 part number as your primary reference helps ensure compatibility. Work with a qualified electrician, and ensure the panel and related feed-throughs are de-energized before any replacement or retrofit work.