QSPD2A035B 35kA Indoor Surge Protective Device for Siemens, Whole House Surge Protector Breaker for Electrical Panel

Surge Protective Devices (SPDs) provide effective protection against both externally generated surges, such as lightning strikes, and internally generated surges caused by switching operations or equipment cycling. For maximum effectiveness, SPDs should be installed as close as possible to the building’s electrical distribution system. Due to cost and space considerations, many facilities install only a single SPD at the main incoming load center. However, industry best practices recommend a cascaded protection approach — placing additional SPDs at downstream panels to reduce residual surge energy and improve overall system protection. This surge protective device is designed to be economical, compact, and easy to install in most compatible load centers and panelboards throughout a building. By allowing flexible installation at multiple distribution points, it helps deliver comprehensive, facility-wide surge protection for residential, commercial, and light industrial applications.

• Whole-Home Surge Protection - Designed to be installed inside your electrical panel, this device safeguards all circuits in your home, office, or RV from high-energy surges, providing comprehensive protection beyond individual plug-in protectors
• 35 kA High Surge Current Capacity - With a maximum surge current rating of 35,000 Amps, the SPD handles lightning strikes, utility surges, and switching transients, ensuring your connected devices remain safe
• Mechanical Status Indicator - Built-in green/red mechanical flags let you visually confirm the SPD’s operational status. Green indicates normal function; red signals that the device has experienced a surge and needs replacement
• Easy Panel-Mounted Installation - Occupying only two breaker slots, the unit installs quickly in most Siemens load centers. Simply connect the white wire to the neutral bus bar for immediate protection
• Indoor Bolt-On Design - Compact indoor SPD module with a bolt-on mounting structure for straightforward installation on most compatible load centers, improving panel protection without taking additional space
• Protects Whole-Home Equipment - Helps safeguard appliances, HVAC systems, electronics, lighting, and other connected circuits from transient overvoltage events
• Important Note - This device uses amechanical indicator (not an LED light). It remainsdark green during normal operationand willchange to bright green when a surge event occurs, indicating that the protection function has been activated.This is normal by design and the unit is operating properly
• Buy with Confidence - 1-year warranty and 30-day return policy available. We strive to improve efficiency, reduce costs, and save time, so you can focus on what matters most. Find your parts here