Creative Commons images are CC BY-NC-SA 3.0

6.95

added to your
shopping cart

quantity
18 available 18 in stock
6.95 1+ units
6.26 10+ units
5.56 100+ units

Description: The Pololu Pushbutton Power Switch is a compact, solid-state power switch controlled by a momentary pushbutton switch. Because the switched current does not flow through the mechanical switch, a large variety of small, low-power switches can be used to control a substantial amount of power. The use of momentary pushbutton switches also allows multiple switches to be used in parallel to control the power to one load. The solid-state switch also allows the load to turn off its own power, which can be beneficial when used with battery chemistries sensitive to over-discharging. Please note that this switch has several drawbacks when compared to mechanical switches, so please be sure you fully understand this product before using it in your system.

The Pololu Pushbutton Power Switch can fit in an 18-pin DIP (dual in-line package) footprint, making it compatible with solderless breadboards and perforated printed circuit boards with standard 0.1" spacing. For such applications, the included male header pins can be soldered to the switch PCB as shown in the picture to the right. Alternatively, wires can be soldered directly to the switch PCB for non-breadboard applications. For high-current applications, make sure that the wires can safely carry the current. Two pads/pins are provided for each of the power nodes, and multiple pads should be used for applications drawing over 5 A.

The included pushbutton switch can be used to trigger the switch. Alternatively, a separate pushbutton, such as a remote panel-mounted unit, can be used instead. Multiple pushbuttons can be wired in parallel for multiple control points, and each of the parallel pushbuttons will be able to turn the switch on or off. The latching circuit performs some button debouncing, but pushbuttons with excessive bouncing (several ms) might not function well with this product.Comes with a pushbutton and 9-pin header not installed.

Features:


  • 4.5-20VDC operating voltage
  • 10A maximum current
  • Draws very little current in off state, typically under 0.01uA

Dimensions: 0.4x0.9x0.125"

Documents:

Comments 9 comments

  • A fun project made possible in part by this pushbutton power switch:
    http://arduiniana.org/projects/the-reverse-geo-cache-puzzle/

  • So, I am not clear on one thing. Once power has been turned on, does pushing the switch again turn power off or do you have to pulse the OFF pin to kill the power?

  • I like that tiny little push button they use. Anyone know where you can get just the button?

    • I don’t know the exact part # used, but you can find tons of them at the usual suppliers - look for ‘tactile switch’, ‘through hole’, ‘rectangular’ or ‘rectangular button’. The former should yield plenty of results. If using a generic search engine, add something like “add to cart” to the query to limit results to stores (that will also filter out some stores that use different terminology, but mostly you’ll be filtering out blogs, information pages, etc.)

  • For everyone who was looking for more information (and usage instructions) for this product, here’s a link to the designer’s website: http://www.pololu.com/catalog/product/750

  • Just mated this with a 22mm piezo pushbutton from schurter. Initially I had some problems going from the ON state to the OFF state, but I added a 2.2k resistor in parallel with a .1u cap from Vin to the outer push button contact and got it to work pretty well. Using it with a DPDT relay to control a linear actuator for an automated cabinet.

  • Hello
    What is the allowed voltage range for the “OFF” input? Would 3.3V - 5V do? Is this active high or low?

    • From the Pololu product page for this switch:
      “Applying more than approximately 1 V to the OFF pin will cause the power switch to turn off. The maximum voltage for the OFF pin is 30 V independent of the switch voltage (VIN)."
      Maybe Sparkfun can add this to their product description of both SV and LV switch versions?

  • Thanks for the link to your project. As cool as the whole GPS box saga has been, the tidbit that was most useful was noting how the OFF pin works. Being Aerospace and not EE (and hence looking at the components and traces wasn’t going to give me any hints) it was nice that you spelled out the following in plain english:
    “When the sketch decides it?s time to shut down … it simply brings the Pololu?s power control pin high, cutting power."
    Not that with some tinkering I couldn’t have figured things out, but now I know. Cheers mate!


Related Products