Siemens | QJ2M100H | Circuit Breaker | 2-Pole | 240V | Bolt-On

Siemens QJ2M100H is a purpose-built 2-pole, 240V bolt-on circuit breaker designed for dependable performance in maintenance, retrofit, and replacement projects where exact specifications matter. This unit is built to align with Siemens panels and accessories, making it a practical choice for preserving panel integrity and electrical safety during upgrades or service work.

Key specifications at a glance

• Poles: 2-Pole
• Voltage: 240V
• Mounting: Bolt-On

Why this breaker stands out

• Exact part reference for flawless compatibility: The part number QJ2M100H is the most reliable guide for matching the right breaker to your Siemens panel system, ensuring proper fit and electrical performance without guesswork.
• Designed for practical, service-friendly installation: The bolt-on mounting provides a secure, straightforward attachment that can simplify panel retrofits and replacements, helping you minimize downtime.
• Targeted for 240V circuits: Ideal for residential, commercial, or light industrial applications where 240V two-pole protection is required, delivering reliable interruption when faults occur.
• Built to support safe, long-term operation: As part of Siemens' trusted lineage, this breaker emphasizes consistent trip behavior and durability in everyday electrical environments.

Use cases and ideal applications

This QJ2M100H breaker is a smart choice for maintenance work on existing Siemens installations, retrofit projects where you need to preserve panel integrity, and replacement scenarios where matching specifications is essential. It’s well-suited for upgrading or restoring two-pole 240V circuits in service panels, subpanels, or switchgear that require a bolt-on style for secure mounting.

How to ensure the right fit

Before ordering, verify the application by confirming the exact fit and ratings for your panel. The part number is the best reference for compatibility, reducing the risk of mismatches and ensuring you receive a breaker that will integrate smoothly with your Siemens system.

Practical tips for a smooth project

• Have the panel model and existing breaker family on hand to cross-check against the QJ2M100H specification.
• Power down the panel and follow standard safety procedures before initiating any replacement or retrofit work.
• If you’re replacing an older bolt-on breaker, reuse any mounting hardware only if it’s in good condition and compatible with the new unit.
• Retain the original documentation and part numbers for future reference and maintenance records.