Siemens QJ22B100 - 100 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens QJ22B100 is a dependable 100A, 240V, 2-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers with precision and confidence. Built for regular, repeatable protection performance, this unit is a practical choice for both new installations and upgrades in residential, commercial, and light industrial environments. Key advantages that set this breaker apart - Secure bolt-on mounting for a rigid, vibration-resistant bus connection, helping to prevent loosening and nuisance trips in crowded or vibration-prone panels. - Thermal-magnetic trip unit delivers stable, repeatable protection by automatically responding to overloads and short-circuit faults, reducing downtime and equipment damage. - Ready to pair with matching OEM load centers and panelboards, ensuring seamless electrical system integration and reliable performance. - Versatile for a range of applications from home electrical panels to small business panels, offering a robust solution for protecting essential circuits. Technical snapshot at a glance - Manufacturer: Siemens - Part Number: QJ22B100 - Type: Thermal-magnetic molded case circuit breaker (MCCB) - Amperage Rating: 100A - Voltage Rating: 240V - Number of Poles: 2 - Mounting Style: Bolt-on - Application: Branch circuit overcurrent and short-circuit protection Why this 2-pole bolt-on breaker is a smart fit - Safe, efficient protection for 240V circuits serving critical loads, with a design that minimizes arc-flash risk and provides clear tripping when faults occur. - The bolt-on format supports solid mechanical contact and faster, more reliable field installation in compatible panelboards and load centers. - The thermal-magnetic mechanism offers dependable protection across varying temperatures and electrical conditions, helping you avoid unpredictable trips and equipment damage. - Ideal for upgrading older panels or specifying a compatible Siemens solution when building out a new electrical distribution system in homes, offices, or light industrial spaces. Use cases and practical applications - Residential electrical panels where consistent protection for main and branch circuits is essential. - Commercial panelboards supporting small office suites, retail spaces, or service areas requiring reliable fault protection. - Light industrial environments with moderate-duty circuits where robust, repeatable trip performance matters. What to consider for best results - Confirm compatibility with your OEM load center or panelboard model to ensure a seamless fit and uninterrupted protection. - Align the breaker’s 100A rating with the circuit’s conductor sizing and the overall panel rating for safe, compliant operation. - For retrofit projects, plan for secure bolt-on mounting to maximize bus connection integrity and minimize vibration-related issues. In short, the Siemens QJ22B100 100A, 240V, 2-pole bolt-on MCCB combines rugged construction, a precise thermal-magnetic trip, and OEM-compatible mounting to deliver dependable branch circuit protection across residential, commercial, and light industrial settings. Choose this breaker when you need a reliable, field-friendly solution that integrates smoothly with Siemens panel centers and supports long-term electrical safety and performance.