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I am designing a circuit to control a latching relay through an MCU. I got this circuit from one of the application notes.

I want to run my K153A-D012P-1BT latching relay. What are the changes I need to do in the circuit to run my relay?


1 Answer 1


Your relay is a dual coil design with a common negative terminal, 12V operated, with 48 ohm per coil (250 mA), according to the datasheet. This means you do not need a "push-pull" circuit to drive a single coil in both directions as in your example schematic.

Possible solution with BJT's:


simulate this circuit – Schematic created using CircuitLab

  • \$\begingroup\$ Thank you. the circuit is working fine \$\endgroup\$ Commented Aug 8, 2022 at 12:47
  • 4
    \$\begingroup\$ @vinayakpotadar There is another nice way to say "thank you" on this site.. \$\endgroup\$
    – Jens
    Commented Aug 8, 2022 at 19:16
  • \$\begingroup\$ @Jens Thank you \$\endgroup\$ Commented Nov 16, 2022 at 10:36

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