Siemens | QJ3B100HA02 | Circuit Breaker | 100A | 3-Pole | 240V | Bolt-On

Meet the Siemens QJ3B100HA02 circuit breaker — a precise, drop-in protection solution designed for 3-phase 240V systems. With a 100A rating and a robust bolt-on mounting, it delivers secure, reliable overcurrent protection for commercial and industrial panels that require exact Siemens-spec replacement parts.

Ideal for maintenance, retrofit, and replacement projects where matching specifications is crucial, this unit is engineered to slot into compatible Siemens enclosures, helping you restore safe operation quickly without unnecessary panel alterations.

Key specifications

• Amperage: 100A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On
• Part number: QJ3B100HA02

Why choose this 3-pole, 240V bolt-on breaker? It’s engineered to deliver dependable protection for three-phase circuits, with a form factor and rating that align with Siemens panel configurations. The bolt-on design provides a secure, vibration-resistant connection, which helps maintain consistent performance in demanding environments.

Compatibility and installation notes

Before ordering, verify your panel’s requirements align with this exact part. The QJ3B100HA02 is the best reference for compatibility across Siemens systems, so cross-check the part number to ensure a seamless fit and rated protection for your application. Installation should be performed by a qualified electrical professional in accordance with all applicable codes and listings.

Use cases and ideal applications

• Repairing or upgrading 3-phase 240V circuits in commercial or light industrial panels requiring a 100A, 3-pole Siemens breaker
• Retrofits where a precise Siemens-compatible replacement is essential to maintain panel listing and safety compliance
• Maintenance cycles in facilities that rely on stable, coordinated protection for multi-line electrical systems

For best results, source the QJ3B100HA02 when your project calls for an exact Siemens part. The combination of 100A protection, 3-pole configuration, 240V rating, and bolt-on mounting makes this breaker a reliable, straightforward solution for keeping essential electrical systems protected and compliant.