Siemens | QJ23B110H | Circuit Breaker | 110A | 3-Pole | 240V | 42kA | Bolt-On

The Siemens QJ23B110H circuit breaker delivers robust, reliable protection for three-phase electrical systems. Engineered for maintenance, retrofit, and replacement projects, this 3-pole, 240 V breaker with a 110 A rating provides dependable shutoff in demanding environments. Its bolt-on mounting ensures a secure, vibration-resistant connection that stands up to industrial use.

• Amperage: 110 A
• Poles: 3-Pole
• Voltage: 240 V
• Interrupting Capacity: 42 kA
• Mounting: Bolt-On
• Part Number: QJ23B110H

Why this bolt-on breaker stands out

Designed for seamlessly upgrading or replacing existing panels, the QJ23B110H combines precise trip performance with straightforward maintenance. The bolt-on design simplifies installation and replacement, reducing panel downtime and keeping critical equipment online faster. Its 42 kA interrupting capacity provides a strong margin for fault currents in medium-to-large distribution setups, helping protect motors, transformers, and feeders from damaging overloads.

Ideal use cases

• Industrial control cabinets and motor control centers needing reliable overcurrent protection
• Retrofits and service upgrades where matching specs are essential
• Commercial distribution panels requiring a sturdy, bolt-on 3-pole solution

Compatibility and installation notes

Part of the Siemens QJ series, this breaker should be matched to panels and bus assemblies compatible with QJ devices. Confirm fit and ratings before ordering and ensure the panel supports a 3-pole, bolt-on configuration at 240 V. As with any critical electrical component, have a qualified electrician perform installation and adhere to all safety and local code requirements.

Performance you can rely on

With a 110 A rated continuous current and a 42 kA interrupting capacity, this breaker is engineered to quickly isolate faults while minimizing unnecessary power interruptions. It’s an effective solution for protecting feeders and motors in demanding environments, reducing the risk of equipment damage and downtime during fault events.

Practical considerations and care

• Keep the exact part number (QJ23B110H) as the compatibility reference for replacements and spares.
• Check mounting torque specifications and ensure secure bolt-on installation to prevent loosening from vibration.
• Store and handle the unit per Siemens guidelines to preserve performance during retrofit projects.

Ready for installation in the right Siemens-compatible panel, the QJ23B110H offers precise protection, straightforward serviceability, and durable performance for 3-phase systems up to 240 V.