Song chuan 833h series miniature sugar cube relays spdt pcb mount song chuan 833h 1c c 4 a 7a 4v dc miniature pcb relay that comes in a baby sugar cube case and is suitable for general applications where high reliability and high switching capacity are needed but where vde approval is not required song chuan 833h 1c c4 pcb mount relay 4vdc 7a spdt