Relay Contact Question

lgreen · 2nd April 2005, 09:49 PM

I've gotten this 12 VDC relay for my soft start circuit. As I said, the relay is actuated by 12VDC. However, I can't figure out which actuation terminal (A or B) is +12VDC and which is ground??? Does it matter? I did a quick experiement and it works both ways. Before I randomly pick one orientation I wanted to check with you all to see whether this was normal so that I don't damage the relay inadvertently.

AndrewT · 2nd April 2005, 10:09 PM

Hi,
you can feed dc in either direction.
This relay is taking current all the time the circuit (amp) is on and will run hot.
Try searching for a volt reduction circuit that increases pull-in current and then runs at reduced voltage, about 50% to 70% of rated voltage.

2nd April 2005, 09:49 PM	#1
lgreen diyAudio Member Join Date: May 2003 Location: San Diego, USA	Relay Contact Question I've gotten this 12 VDC relay for my soft start circuit. As I said, the relay is actuated by 12VDC. However, I can't figure out which actuation terminal (A or B) is +12VDC and which is ground??? Does it matter? I did a quick experiement and it works both ways. Before I randomly pick one orientation I wanted to check with you all to see whether this was normal so that I don't damage the relay inadvertently.

2nd April 2005, 10:09 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, you can feed dc in either direction. This relay is taking current all the time the circuit (amp) is on and will run hot. Try searching for a volt reduction circuit that increases pull-in current and then runs at reduced voltage, about 50% to 70% of rated voltage. __________________ regards Andrew T.

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