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Modyfikator

Newbie

Aquaero 4 burnt relay

Tuesday, January 21st 2014, 9:21pm

Hi,
Wanted to use a relay in my aquaero 4 for switching cold cathodes. I read in the manual that it can stand a 1A at 12V (chapter 4.8, page 10), so I didn't worry since my cathodes draw about 0.75A at 12V.
Connected it and... relay doesn't work any more (it's always on). Found the relay datasheet which says that maximum switching current is.. 0.5A. So because of mistake in owners manual I don't have a relay any more.
Just have to find a relay that can stand a 1A maximum switching current (if there is any) and swap them.

relay datasheet: http://www.jameco.com/Jameco/Products/ProdDS/1860088.pdf
relay number: hamlin HE3621A0510

Just saying so you guys don't make the same mistake:)

Question is what max power can the coil be, is 360mW ok?

This post has been edited 4 times, last edit by "Modyfikator" (Jan 21st 2014, 10:17pm)

Modyfikator

Newbie

Wednesday, January 22nd 2014, 4:23pm

Just wanted to share a quick mod of Aquaero relay I did today.


Soldered out the relay and soldered a fan socket instead.



Luckily I managed to put the relay in the cold cathodes converter casing.


Closed converter case . Black and green - relay control (from Aquaero). Black and red - cathodes power (12V from psu ). White - cathodes.



Powered it up, works brilliant!

wa3pnt

Full Member

Wednesday, January 22nd 2014, 4:53pm

Great work!

Do you have a part number for the Relay that you used?

RodeoGeorge

Modyfikator

Newbie

Wednesday, January 22nd 2014, 10:44pm

Yes, it's HF3FF. You can use whatever relay you want just make sure that its coil doesn't draw to much current , I think that 500mA maximum is safe.

wa3pnt

Full Member

Thursday, January 23rd 2014, 3:40am

Yes, it's HF3FF. You can use whatever relay you want just make sure that its coil doesn't draw to much current , I think that 500mA maximum is safe.
Thank you.

RodeoGeorge

Modyfikator

Newbie

Thursday, January 23rd 2014, 1:48pm

Oh and don't forget that coil voltage must be 5V.