If I have the following components:

  1. 12v Car Battery
  2. 12v 2amp relay
  3. push button switch (normally open)

Can I simply just link all three components in series and expect the following:

  1. The relay to fire
  2. The relay to live

Or do I have to add additional components (resistors etc)?

The relay in question is this one: http://www.maplin.co.uk/2a-miniature-dpdt-latchingrelay-37529

  • \$\begingroup\$ and the answer appears to be yes I can :) \$\endgroup\$
    – Sk93
    Feb 15, 2013 at 14:45
  • 1
    \$\begingroup\$ 15 minutes after your post. My guess, you managed to wait a full 5 minutes before deciding curiosity was more dangerous then fire. I applaud your self control :) Could you give a circuit of what you wired up? This answer is a bit sparse. \$\endgroup\$
    – Kortuk
    Feb 15, 2013 at 15:01
  • \$\begingroup\$ LOL at "curiosity was more dangerous than fire". \$\endgroup\$ Feb 15, 2013 at 17:53

2 Answers 2


Yes, that will work - obviously you connect to the "coil" pins. Note that that is a 2-coil latching relay: activating one coil will switch the contacts one way, activating the other will switch it back.

Datasheet (found by inspecting the part number with zoom on that page)


That's how many safety and control switches work. You fire a relay with a little current and low voltage then the relay activates something bigger.


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