Keywords: SPST-NO relay symbol.svg The circuit symbol for a single-pole single-throw normally-open SPST-NO relay Electrical_symbols_library svg SPST-Switch svg 2010-07-29 13 08 UTC Electrical_symbols_library svg User FDominec et al SPST-Switch svg Iainf 22 01 3 July 2006 UTC derivative work Moxfyre <span class signature-talk >talk</span> </nowiki> Uploaded with derivativeFX Relay circuits |