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Latching Relay Setup, Diode vs Resistor

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=146634
Printed Date: May 02, 2025 at 9:53 AM


Topic: Latching Relay Setup, Diode vs Resistor

Posted By: kramttocs
Subject: Latching Relay Setup, Diode vs Resistor
Date Posted: December 27, 2020 at 4:58 PM

I am looking to implement this: https://www.the12volt.com/relays/relaydiagram21.html

The relay on the left has a diode. Does it need to be a diode? I have some 4pins iso 280 relays that have resistors but unsure if there is a specific need in this use case for a diode.

Thank you


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