I'm looking for an SPST analog switch (or alternative device) capable of handling >=150mA (5VDC) across its switch, controllable by a logic-high signal. I've been looking on digikey, and haven't had much luck finding anything capable of handling more than 25mA (it's also been tough as there doesn't seem to be a way to filter by current/power rating).

Thank you very much for your help!

EDIT: Thank you all for the help and suggestions!

Umar: No, I meant capable of handling at least 150mA

mkeith: I'm actually rethinking my design, so I won't bother posting my very rough draft schematic

Alex Hajnal: I hhd tried that on Digikey but with no success, thanks for the mouser suggestion!

Transistor: Yea I realize my typo, that's what happens when I try to do stuff quickly late at night ;)

  • \$\begingroup\$ Current rating did you mean less than or equal to? \$\endgroup\$ – Umar Aug 25 at 4:50
  • \$\begingroup\$ Can you show how you will use it in a schematic? There is a possibility that what you really need is not what you think you need. For example, would a load switch do what you want? That is a category of IC you can search for. But it connects a voltage rail to a load. It is not EXACTLY the same as an analog switch. \$\endgroup\$ – mkeith Aug 25 at 4:57
  • \$\begingroup\$ Try including the phrase "High current" in your parametric search. This Maxim part, for example, is rated up to a maximum (do-not-exceed) continuous current of ±300mA. \$\endgroup\$ – Alex Hajnal Aug 25 at 5:06
  • \$\begingroup\$ Standard terminology is "current through a switch" and "voltage across a switch. You wouldn't say "water flow across a pipe". \$\endgroup\$ – Transistor Aug 25 at 8:21
  • \$\begingroup\$ FYI, responses added to post \$\endgroup\$ – MyFingerHertz Aug 27 at 1:47

This is just an example. You can search based on your requirements in the same fashion in digikey or mouser. Please post a new specific question if you are still stuck.
TS5A12301E from TI. http://www.ti.com/switches-multiplexers/analog/products.html#p480=1;1&p3139max=271.987;450

enter image description here

Current rating is upto 450 mA

enter image description here

  • \$\begingroup\$ Thank you for the reference! \$\endgroup\$ – MyFingerHertz Aug 27 at 1:48

try this


simulate this circuit – Schematic created using CircuitLab

  • 1
    \$\begingroup\$ Please explain about its working and ports \$\endgroup\$ – Umar Aug 25 at 15:13
  • \$\begingroup\$ probably about 20 mA into the base; for 150mA Ic, only need beta of 7.5, so the bipolar should be well saturated with low Vce. The OFF bipolar merely needs the base lowered to +4 volts; taking the OFF base to 0volts will stress the reverse-breakdown of base-emitter, so I'd suggest just dropping to +3 or +4volts. \$\endgroup\$ – analogsystemsrf Aug 27 at 10:56

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