basic Bosch-style relay
Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=139170
Printed Date: April 24, 2024 at 10:50 AM
Topic: basic Bosch-style relay
Posted By: douglas79
Subject: basic Bosch-style relay
Date Posted: July 07, 2015 at 1:23 PM
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.
Replies:
Posted By: howie ll
Date Posted: July 07, 2015 at 4:40 PM
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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