Siemens | QJ3M100 | Circuit Breaker | 100A | 3-Pole | 240V

Introducing the Siemens QJ3M100 Circuit Breaker — a precise, reliable 100A, 3-Pole unit designed for 240V 3‑phase protection. Built for maintenance, retrofit, and replacement projects, this breaker ensures exact specifications are met so your electrical system stays protected and compliant.

Key specifications

• Amperage: 100A
• Poles: 3-Pole
• Voltage: 240V

Why this Siemens QJ3M100 stands out

Designed to protect all three hot conductors in a 3‑phase distribution, the QJ3M100 delivers consistent, dependable protection across your entire circuit. The unit’s build and specifications are tailored for compatibility with Siemens panels and gear, making it a trusted choice for professionals who prioritize reliability and extended service life. Crucially, this breaker is selected not just for its numbers, but for its compatibility with existing Siemens installations where the part number is the best reference for a precise match.

Ideal applications

• Maintenance or service work on 3‑phase panels requiring a 100A, 3‑pole 240V breaker
• Retrofits to upgrade protection in older Siemens gear without overhauling the panel
• Replacement in compatible Siemens 3‑phase distribution systems to restore full protection

Compatibility and installation tips

• Before ordering, verify fit and ratings for your panel. The QJ3M100 part number is the most reliable reference for compatibility.
• Ensure your panel is designed for 240V, 3‑phase operation and can accommodate a 100A, 3‑pole breaker.
• Follow all safety guidelines and local electrical codes. If in doubt, consult a licensed electrician to ensure proper installation and fault protection alignment.