# need help again

Discussion in 'The Projects Forum' started by oolesh, Apr 27, 2012.

1. ### oolesh Thread Starter New Member

Apr 21, 2012
24
0
hi guys
i have see a relay on ebay the Specifications is below
do u think if i can put a 12vdc OUTPUT of the relay because i see only 28vdc??or 28vdc is the maximum current?? what did this mean 'Coil rated voltage: 3-48VDC' can i put 3vdc 'INPUT' it will work??THANKS

• Contact form: 1a, 1b, 1c
• Rated load: 10A 240VAC/28VDC,10A 125VAC/28VDC,7A 240VAC/28VDC
• Contact resistance: <=100m (ohm)
• Electrical life: 100,000
• Mechanical life: 10,000,000
• coil rated voltage; 3-48vdc
• Coil power: 0.36W, 0.45W
• Coil pick-up voltage: <=75%
• Coil drop-out voltage: >=10%
• Ambient temperature: -25 degrees Celsius to +70 degrees Celsius
• Coil and contacts:1500VAC/min
• Contact and contacts: 1000VAC/min
• Insulation resistance: >=100M (ohm)
• Mounting form: PCB
• Weight (g): 10

• Outline dimensions (mm): 19.0x 15.5 x 15.0

Last edited: Apr 27, 2012
2. ### debjit625 Well-Known Member

Apr 17, 2010
790
186
Didn’t understood what you are trying to say.
28 VDC is a voltage rating its not current, current is measured in Amperes

It means you can apply 3 VDC minimum to the coil and 48 VDC maximum to the coil to energized the relay.

As per specifications it should work.

Good Luck

3. ### t06afre AAC Fanatic!

May 11, 2009
5,939
1,222
Hi Oolesh.
If you need a cheap 12 volt DC realy. Go to a scrapyard and take one out from a old car.

4. ### KMoffett AAC Fanatic!

Dec 19, 2007
2,584
234
In my experience a "coil rated voltage: 3-48VDC" would mean that that model is available in coil voltages ranging from 3VDC to 48VDC. Like 3v, 5v, 6v, 12v, 24v, 48V. Never seen a relay that had a voltage rating that will withstand 48V on the coil and dropout at less that 3V. How about a link to the eBay post?

Ken

Apr 21, 2012
24
0
6. ### KMoffett AAC Fanatic!

Dec 19, 2007
2,584
234
Right at the top of the page "Mini 5V DC Power Relay". Its coil is rated for operation at 5VDC, and the contacts are rates for a maximum current 10A at voltages up to 28VDC.

Ken