Electronics > Beginners
Identify value in ohms relative of coil relay
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PTR_1275:
No problems.

I forgot to mention in my previous post that those figures given were for a 12v coil. If you are running a different voltage, the figures will change
Jasonbit:
On this link: https://www.finder-relais.net/en/finder-relays-series-40.pdf
I can see the specifications about relay 40.31. On this board, page 1 of 8, https://snag.gy/QxL97M.jpg, I can discovery which the current I will need to energize the coil with 6VDC. Because the power necessary is 0.65W to 6VDC, this means which my current will be: 0.65/6=0.108A, right?

Thanks
mansaxel:
Hmm.
  (what am I, a newbie, missing?)
On page 7 in the document you linked to, there are all the data you need, in plain text.


--- Code: ---Nominal     Coil     Operating range    Resistance Rated coil     DC: Release
voltage     code                                   consumption    resistance**
UN                   Umin      Umax     R          I at UN        R DC
V                    V         V        Ω          mA             Ω
6           6.006    4.8       6.6      33         165            62

--- End code ---

So, 33Ω, 165mA and 6V. Don't forget the snubber diode! 
sarahMCML:
Hi Jasonbit,

If you are using the 0.65W relay #9006, 6V, the coil resistance is 55 ohms, giving a current of 109 mA, whereas if it is the sensitive relay #7006, then its resistance is 75 ohms, giving a current of 80 mA. These values are all given on page 8 of the second URL of your first post.

Regards,

Sarah.
vk6zgo:
The coil resistance of a relay is simply that--- resistance!
If you measured the thing with the ohms range of your DMM, you would have known it a month ago!
( It seems you already have the relay, because you talk about testing it with the "diode test" function of your DMM).
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