Siemens QJ23B110 - 110 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens QJ23B110, a purpose-built 110A, 240V, 3-pole bolt-on molded case circuit breaker designed to guard electrical systems with precision. Built to protect branch circuits from overcurrent and short-circuit events, this unit delivers dependable, repeatable protection in panelboards and load centers, helping you maintain safe, compliant power distribution in a variety of settings.

• Secure bolt-on mounting: Engineered for a rigid bus connection, the bolt-on design resists vibration and panel movement, maintaining consistent electrical contact even in challenging environments.
• Thermal-magnetic trip unit: Combines time-delay overcurrent protection with instantaneous short-circuit trip for stable and predictable protection performance at 110A, reducing nuisance trips while guarding downstream devices.
• OEM-compatible: Specifically suited to pair with matching Siemens OEM load centers and panelboards, ensuring proper fit, alignment, and coordinated protection across the system.
• Versatile application: Ideal for residential service upgrades, commercial installations, and light industrial panels where robust branch circuit protection is essential.
• Reliability in critical environments: By combining solid mechanical mounting with precise electrical protection, this 3-pole breaker helps safeguard multi-wire circuits and shared-neutral configurations often found in complex panel layouts.

Technical snapshot

• Manufacturer: Siemens
• Part Number: QJ23B110
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 110 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

This breaker is a practical choice for projects that require reliable, long-term protection without complicated compatibility concerns. Use it in panelboards and load centers designed for Siemens bolt-on devices, and let the thermal-magnetic mechanism handle both gradual overloads and sudden surges. For best results, ensure your installation adheres to the panel’s guidelines and follows standard electrical practices for safe, compliant operation.

Who benefits most: electrical contractors, facilities managers, and do-it-yourself enthusiasts undertaking panel upgrades or new subpanel installations in homes, retail spaces, offices, or light industrial environments. If you’re upgrading a legacy system or replacing a worn breaker in a Siemens-compatible panel, the QJ23B110 delivers predictable performance with clear protection boundaries for your valued equipment.