Siemens QSPD2A035B BoltShield Surge Protection Device

Siemens BoltShield QSPD2A035B is a 2-pole indoor surge protection device designed for residential 120/240 V single‑phase load centers and engineered to drop into the standard Siemens QP footprint, with compatibility also for 208Y/120 V configurations. This UL 1449 listed Type 1 SPD delivers a 35 kA surge current rating per mode/phase and a 22 kA short‑circuit current rating (SCCR), with a nominal discharge current (In) of 20 kA and a VPR rating of 700 V for L‑N and L‑G paths, providing robust protection against external surges as well as transient internal events. The unit is a plug‑on 2‑pole device equipped with pre‑wired #14 AWG conductors and green/red mechanical flag indicators to communicate status and fault conditions at a glance, and it supports both L‑N and L‑G protection, with potential L‑L protection in certain configurations. Rated for 120/240 V AC service (1Ø, 3W), the BoltShield device is designed to shield appliances and sensitive electronics in residential applications from surge energy while meeting common code and installation requirements for compatible load centers.