Siemens | QJ23B110A01 | Circuit Breaker | 110A | 3-Pole | 240V | Bolt-On

Reliable protection for 3‑phase 240V systems, the Siemens QJ23B110A01 Circuit Breaker delivers 110A of overcurrent protection in a rugged bolt‑on design. Engineered for maintenance, retrofit, and replacement projects, this 3‑pole breaker provides a like‑for‑like fit for compatible Siemens panels, helping you keep critical electrical systems running smoothly with minimal downtime.

• Amperage: 110 A
• Poles: 3‑Pole
• Voltage: 240 V
• Mounting: Bolt‑On
• Part number: QJ23B110A01
• Applications: Maintenance, retrofit, and replacement in compatible Siemens installations

Why this Siemens QJ23B110A01 stands out

• Exact fit for Siemens bolt‑on panels: Designed to integrate with the QJ family, ensuring secure seating and reliable electrical contact in systems that require bolt‑on mounting.
• 3‑pole 240V design: Ideal for three‑phase distribution where shared neutral or 240V circuits are protected across all three legs.
• Secure installation: Bolt‑on mounting reduces the risk of loose connections and vibration‑induced wear, enhancing long‑term reliability in demanding environments.
• Like‑for‑like replacement: Maintains the same footprint and electrical characteristics, simplifying retrofits and panel upgrades without altering other components.
• Clear compatibility reference: The part number QJ23B110A01 is the most reliable reference when verifying compatibility with your existing panel lineup.

Ideal use cases

• Maintenance replacements in service or distribution panels that require Siemens bolt‑on breakers
• Retrofit projects upgrading older equipment to current Siemens specifications while preserving panel architecture
• New installations that demand a proven 110A, 240V, 3‑pole bolt‑on solution within a Siemens ecosystem

Practical tips for selection and installation

• Before ordering, confirm fit and ratings for your specific panel model; the QJ23B110A01 is the best reference for compatibility.
• Match the required amperage and voltage to your circuit to ensure proper protection and coordination with upstream devices.
• For best results, plan the retrofit around panels that already support QJ‑series bolt‑on breakers to minimize modification and maintain electrical continuity.
• During installation, ensure power is fully isolated and follow your organization’s safety procedures for disconnecting and testing 3‑pole devices.