Siemens QSPD2A035B 35 kA Indoor Surge Protective Device | BoltShield

The Siemens QSPD2A035B is an indoor surge protective device designed to sit as close as possible to your building's distribution panel. By placing SPDs near the service equipment, surge energy can be managed before it travels through circuits and connected devices. This approach aligns with practical protection strategies for modern homes and small to mid-size facilities.

Powerful, reliable protection you can install with ease

With 35 kA surge current protection per phase, the QSPD2A035B delivers robust energy handling suitable for common loads in residential and light commercial environments. It’s designed to be economical and straightforward to fit alongside existing Siemens load centers, making it a practical upgrade for facilities looking to enhance surge resilience without a complex installation.

• Fits into existing Siemens load centers for a seamless retrofit
• 35 kA surge current protection per phase for strong energy absorption
• Green/red mechanical indicators provide protection status at a glance (no LEDs required)
• Plugs directly into the load center bus for quick installation

Easy installation, clear status, scalable protection

Designed for fast, tool-free integration, the QSPD2A035B plugs into the load center bus, reducing setup time and wiring complexity. The mechanical indicators are durable and easy to interpret, helping you verify protection status during routine checks. For buildings where multiple panels play a role in protection, this device supports a practical cascade approach that aligns with common protection strategies for distributed electrical systems.

• Compact footprint suited for crowded panels or retrofit projects
• Electrical panels stay tidy with a plug-in design
• Mechanical indicators offer visible status checks without reliance on LEDs
• Suitable for homes, small offices, and spaces using Siemens panel infrastructure

Real-world use and what to expect

In everyday settings, the QSPD2A035B helps manage surge energy close to the service equipment, which can help reduce stress on downstream circuits and connected devices. Users often appreciate the straightforward install process and the familiar Siemens panel compatibility, making it a pragmatic upgrade during panel renovations or new builds. While not a guarantee against all surge events, the device provides a tangible layer of localized protection that complements other building safeguards.

Note: Always follow local electrical codes and manufacturer guidelines when planning surge protection across multiple panels. The QSPD2A035B is intended to be part of a broader protection strategy rather than a lone, one-size-fits-all solution.