Siemens QSA2020 20 Amp 2 Pole Surge Protector Circuit Breaker 120/240 Vac Type Q | eBay
Siemens 20 Amp 6.5 in. Whole House Surge Protected-Circuit Breaker RBPU QSA2020SPDP - The Home Depot
Type 1 surge arrester - 5SD741 -1 series - Siemens Low-voltage – Power distribution - for electrical installations / remote signaling / electronic equipment
Siemens 15 Amp Single-Pole Type QP Surge Protection Circuit Breaker QSA1515SPD - The Home Depot