Appoldt Solid State Relays SSR 634236 - Appoldt 2011, Appoldt's PFE240D25 is a compact semiconductor relay measuring 21x85x55mm. It features zero crossing switching, making it ideal for reducing electrical noise in various applications. Common uses include industrial automation and electronic load regulation. Appoldt 2011 PFE240D25 DC/AC SSR LED Input, DIN Rail TS35, Fuse T4A