Siemens | QJ3B100A01 | Circuit Breaker | 100A | 3-Pole | 240V | Bolt-On

Meet the Siemens QJ3B100A01 Circuit Breaker—a purpose-built protection device designed for demanding 3‑phase, 240V electrical systems. With a robust 100A rating and three-pole configuration, this bolt-on breaker is crafted for maintenance, retrofit, and replacement projects where precise compatibility and reliable fault interruption are essential.

• Amperage: 100A
• Poles: 3‑Pole
• Voltage rating: 240V
• Mounting: Bolt-On
• Part number: QJ3B100A01

This Siemens breaker stands out for its exact fit within the QJ bolt-on family, making it a dependable choice for panel replacements and retrofits where accuracy matters most. The 3‑pole design supports balanced protection across three live conductors, while the 240V rating aligns with common commercial and industrial 3‑phase circuits. By choosing the genuine QJ solution, you keep panel electrical architecture consistent and simplify future servicing.

Ideal use cases

• Retrofits and replacements in Siemens panels that require a 3‑pole, 240V, 100A bolt-on breaker.
• Maintenance spares to minimize downtime in electrical rooms, data centers, or manufacturing floors.
• New installations where a bolt-on Siemens protection device is specified by the panel labeling.

Key benefits in practical terms

• Genuine Siemens component designed to align with your panel’s busbar profile, reducing compatibility questions during installation.
• Clear, unambiguous part reference (QJ3B100A01) to streamline ordering and exact matching with existing inventory.
• Solid 100A protection for medium-to-heavy load circuits, helping safeguard equipment and maintain operational continuity.

Important compatibility and installation notes

Before ordering, confirm fit and ratings for your specific panel. The part number is the most reliable reference for compatibility, and cross-checking against your panel’s documentation will help ensure a seamless replacement or retrofit.

With the Siemens QJ3B100A01 circuit breaker, you gain a dependable, purpose-made solution that aligns with your 3‑phase, 240V protection strategy, minimizes installation guesswork, and supports long-term reliability across industrial and commercial applications.