how many type of 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=96414
Printed Date: May 13, 2025 at 8:56 AM

Topic: how many type of relay?

Posted By: megatfauzi76
Subject: how many type of relay?
Date Posted: August 15, 2007 at 3:58 AM

Hai,

What the meaning of SPDT relay? Ist the relay have terminal 85,86,30,87a,87..when we energized terminal85 & 86,terminal 30 will connet to 87...if not energized..30 willconnect to 87a...

Ist correct?

Thank You

Replies:

Posted By: i am an idiot
Date Posted: August 17, 2007 at 7:27 PM

SPDT means that the relay is a Single Pole Double Throw. Yes everything you said about the relay is correct. A SPST relay is missing terminal 87A. There are also DPDT, 3PDT, and 4PDT available at Radio Shack. These are just 2 3 or 4 relays in one case.

Posted By: hotwaterwizard
Date Posted: August 18, 2007 at 12:36 AM

There are thousands of types of relays

Here are a few

posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: hotwaterwizard
Date Posted: August 18, 2007 at 1:03 AM

What would you call this one?

posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

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