Siemens | HQJ3B125H00S11 | Circuit Breaker | 125A | 3-Pole | 240V | Bolt-On

For professionals maintaining Siemens electrical systems, the HQJ3B125H00S11 circuit breaker delivers precise 125A, 3-pole, 240V protection in a bolt-on design—ideal for maintenance, retrofit, and replacement where exact specs matter.

Precise specs that matter

• Amperage: 125A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On
• Part reference: HQJ3B125H00S11

Key benefits and use cases

Whether you're upgrading a 3‑phase service, replacing a failed breaker, or retrofitting an older panel, this breaker is designed to drop into compatible Siemens panels with matching ratings. The 3‑pole design ensures simultaneous disconnection of all three phases, which is essential for balanced motor loads and protective coordination in industrial or commercial equipment.

• Maintenance and repairs: Quick, secure replacement when existing specs match
• Retrofit projects: Aligns with Siemens 3‑phase systems requiring 125A protection
• Replacement: Keeps system safety intact without changing downstream gear

Installation and compatibility tips

Before ordering, verify that your panel accepts bolt-on, 3‑pole, 240V protection at 125A and that HQJ3B125H00S11 is the correct part reference. The part number is the most reliable reference for compatibility, ensuring the breaker's trip curve and physical fit match the existing hardware.

Why this Siemens breaker stands out

Siemens builds this 125A, 3‑pole, 240V bolt-on breaker to deliver dependable protection for three‑phase circuits in commercial and industrial environments. With the exact part number HQJ3B125H00S11, technicians have a precise replacement that aligns with the system's protection strategy and downstream equipment coordination, reducing downtime and uncertainty during service events.