Siemens | QJ23B110A02 | Circuit Breaker | 110A | 3-Pole | 240V

Introducing the Siemens QJ23B110A02 Circuit Breaker—a precise, purpose-built protective device designed for 240V systems that run three-phase loads. Engineered for maintenance, retrofit, and replacement projects, this breaker delivers dependable interruption protection when matching specifications matters most.

Key specifications at a glance

• Amperage: 110 A
• Poles: 3-Pole
• Voltage: 240 V
• Part number: QJ23B110A02

Why choose the Siemens QJ23B110A02 for your panel

What sets this circuit breaker apart is its exact part-number accuracy. Using QJ23B110A02 as the reference ensures compatibility with Siemens panels and components in the QJ family, preserves the intended trip characteristics, and minimizes the risk of mismatched protection. This isn’t a generic replacement—it’s a true, factory-aligned solution that keeps electrical protection consistent with the original design.

Who is this ideal for?

• Electrical contractors handling panel upgrades, repairs, or routine maintenance in commercial or light industrial environments.
• Facility managers responsible for reliable three-phase distribution with 240V circuits.
• Technicians performing retrofit work where exact specifications are required to maintain system warranties and protection standards.

Practical use cases and scenarios

• Retrofit projects where aging or worn breakers need an exact Siemens replacement to maintain approved protection curves.
• Maintenance schedules for three-phase equipment powered by 240V networks, ensuring consistent shutdown behavior during faults.
• New installations in Siemens-compatible panels that demand a 110 A, 3-Pole, 240 V protective device with reliable coordination.

Installation and compatibility notes

Before ordering, confirm fit and ratings to ensure seamless integration. The part number QJ23B110A02 is the most reliable reference for compatibility, so cross-check it against your panel labeling and documentation to avoid mismatches that could affect protection and warranty.

What you gain with this Siemens circuit breaker

• Precise protection for 240V, three-phase circuits with a 110 A rating, supporting stable electrical distribution in demanding environments.
• Enhanced reliability through a genuine Siemens component designed to align with original system specifications.
• Streamlined maintenance—fewer surprises during replacement thanks to exact part matching and documented compatibility.