Boards using the HFD4/5

Boards in 2 GitHub repositories, designed in KiCad, that use the HFD4/5 by HF (-40℃~+85℃ 100mΩ 140mW 178Ω 2 Form C: 2C (DPDT-CO) 220V@DC、250V@AC 2A 300mA@125VAC、1A@30VDC 3ms 3ms 5V 8 AgNi + Gold plated Polarized-Single Coil DIP,10x6.5mm Signal Relays ROHS). See how each wires it, with its parts, size, README and files; the HFD4/5’s symbol, footprint and pinout are on its own page.