activating reed switch

Hello,

I made myself a small electromagnet to activate a reed switch using a
6v supply. The problem is that I am pulling 3 amps,  I do not want the
electromagnet to be bigger by making more turns, I believe there are
such electromagnet on the market that can activate a reed switch with
current in the milliamps. anybody  know such device, I looked  at
digikey and mouse but I did not find anything under electro magnet.

thanks

ken