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basic Bosch-style relay


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douglas79 
Member - Posts: 25
Member spacespace
Joined: June 12, 2011
Location: California, United States
Posted: July 07, 2015 at 1:23 PM / IP Logged Link to Post Post Reply Quote douglas79
I know what a relay is and how it works, but I was curious with respect to the 85/86 prongs that energize the coil, does it matter which has 12V and which has ground? I know whatever you put on one you need to put the opposite on the other, but does it matter which polarity goes on which terminal? Thanks.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: July 07, 2015 at 4:40 PM / IP Logged Link to Post Post Reply Quote howie ll
Frankly no unless there's an in-built quenching diode, that will be labelled on the case, BUT international convention says 86, coil+ 85 coil-. N.B. with internal diode the + will ALWAYS be 86.

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