Automotive relays are typically 150-200mA ("72 ohm coil").
Smallish reed relays with 12V coils are in the 12mA range. ("1K ohm coil").
As I hint above, relay specs are typically given in coil resistance.
Tim.
Automotive relays are typically 150-200mA ("72 ohm coil").
Smallish reed relays with 12V coils are in the 12mA range. ("1K ohm coil").
As I hint above, relay specs are typically given in coil resistance.
Tim.
Depends on what you mean by small, but small power relays (eg. a few A) typically consume in the hundreds of mW (eg. 360mW). At 12V, that's
30mA. You can probaby find some in the 100mA range. Generally, coil power goes up with switching current, lifetime and voltage isolation, so relays made to more stringent European safety standards tend to use a bit more power.Best regards, Spehro Pefhany
-- "it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com
-- Potter and Brumfield T7NS5D1-12 http://relays.tycoelectronics.com/datasheets/T7N_DS.pdf
Does anyone have any idea as to how many milliamps do small coil based relays (12v coil) draw, typically?
iIf you know the make an model you can look it up
Or
You can measure the coil resistance with an ohm meter and calculate it
Dan
-- Dan Hollands 1120 S Creek Dr
Thanks, Spehro, Tim, and Dan.
I am trying to buy some cheap relays to let my kid play with his toy LifeLike railroad.
He is very much into traffic lights and this railroad.
For example, if a train approaches a RR traffic light, and it is red or yellow, stop the train. If a train approaches a crossing, light red light on the crossing. Etc. It should be very easy with a 12v power supply and some relays and alligator clips, and maybe light switches or some such.
We already have a power supply, traffic light etc.
So, I am looking to buy some cheap 12v coil relays. Hence my question.
i
Thanks, that's good stuff. I will try to find something like that for less on ebay, if not, I will buy some new ones.
i
Thanks. I bought some 50 Sigma 12v 4 pole SPDT relays at 60 cents apiece on ebay... I hope that they should work fine. The power supply has quite a bit of extra power available after powering the toy train, so amp draw of coils should not be a huge issue.
iOn Tue, 06 Dec 2005 17:59:03 GMT, Ignoramus21666 wrote in Msg.
Datasheets and ammeters usually have pretty good ideas about how much current things draw.
robert
and little kids have fairly good ideas of how to wreck ammeters :) But I quite agree, it would be the thing to get for them.
NT
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