Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
also when the relay first turns on there is an 'inrush' current which is called umm.. i forget now. but generally you can expect this spike of current to be almost 7 times your hold current!! so, your transistor better be rated for that too.
many thanks for your comment, the relay I'm using is one SIP SERIES DRY REED RELAY DSS41A05BR - DSS4 RELAY, 1FA, 500 OHMS, 5V. Contact Form:, 1A/1B, Contact Rating:, 10, Switching Voltage:, 200, Switching Current: