Hongfa HFD3 2A Subminiature PCB Mount Signal Relays DPDT – Hongfa HFD3/005-S, A subminiature PCB signal relay with a 5V DC coil, switching capacity of 2A and a DPDT contact configuration. The relay is of the Single Side Stable (SSS) type and has surface mount terminals. Hongfa HFD3/005-S PCB Signal Relay 5V DC DPDT 2A SMT Type