KW11-3Z micro limit switch with straight steel lever, front three-quarter view showing the two solder tabs at positions 1 and 3

KW11-3Z Micro Limit Switch with Lever - 2-Pin Normally Open 5A 250VAC

$1.69 NZD
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KW11-3Z micro limit switch with straight steel lever, front three-quarter view showing the two solder tabs at positions 1 and 3
  • KW11-3Z micro limit switch with straight steel lever, front three-quarter view showing the two solder tabs at positions 1 and 3
  • Numbered front face of the 2-pin KW11-3Z switch: 5A 125 250V T85 marking and terminal numbers 1, 3 and 2, with tabs at 1 and 3 only
  • Back face of the switch moulded NC, NO and C, with tabs under NO and C and no tab under NC
  • Switch turned over with the two flat solder tabs pointing up, each with a wire hole, and the empty third position
  • KW11-3Z 2-pin switch dimensions: body 20 mm long and 10 mm high, mounting holes 9.5 mm apart
KW11-3Z Micro Limit Switch with Lever - 2-Pin Normally Open 5A 250VAC
SKU: SW-KW11-3Z-2PIN-LV

KW11-3Z Micro Limit Switch with Lever - 2-Pin Normally Open 5A 250VAC

$1.69 NZD
Order before 7:30am for same-day dispatch 7-day dispatch, excluding public holidays

NZ Post: 1-2 days urban · 2-4 days rural

Shipping from $5.99 urban / $9.99 rural.

Buy more, pay less Prices shown are per unit. Add enough of this item and the lower rate applies on its own at checkout. There is no code to enter and you do not need to buy a pack. Choosing a tier here just sets the quantity for you. Larger quantities go out in the same bag, so packing, handling and postage cost us less per unit. We pass that saving straight on to you, so you can buy more for less.

Easy 30-day returns · 12-month warranty

Free Urban delivery on orders over $66
Urban $66 Rural $88

The KW11-3Z is a small micro limit switch with a sprung steel lever and two terminals. It is normally open: the circuit between its two pins closes only while the lever is pressed. It suits end-of-travel stops, lid and door detection, and Arduino or ESP32 projects, and works with 3.3V and 5V controller inputs. Price is per switch. Need a normally closed contact too? The SC7301 3-pin lever switch has COM, NO and NC, and the KW11-3Z also comes as a 3-pin roller lever and a 3-pin no-lever version.

Specifications

ModelKW11-3Z, 2-pin lever
Contact formNormally open (SPST-NO)
Pinout1 = COM, 3 = NO (no pin at 2 / NC)
ActuatorStraight steel lever, about 16 mm
Rating marked5A 125/250VAC, T85
DC useSignal level only, no DC power rating
Body sizeAbout 20 x 10 x 7 mm
Mounting2 x 2.35 mm holes, 9.5 mm apart, suit M2
Terminals2 solder tabs with wire holes, about 4 mm

Datasheets

Full technical datasheet PDF

What's in the box

1×
KW11-3Z 2-pin lever micro limit switch

Per switch, in the quantity you order. Wires and screws are not included.

Great for

Detecting a lid, door or drawer closing
End-of-travel stops on a slide or small gantry
Bump sensors on a small robot
Counting cam or lever passes with an Arduino
Home switches for simple stepper projects
Paper, coin or tray present sensing

Wiring & getting started

  1. Find the pins

    On the numbered face, with the lever pivot on the left, the two tabs are 1 (COM, at the pivot end) and 3 (NO, in the middle). The back face reads C and NO. Position 2 (NC) has no tab.

  2. Wire it to your board

    Connect pin 1 to GND and pin 3 to a digital pin set to INPUT_PULLUP. The pin reads HIGH at rest and LOW while the lever is pressed. This works the same on 3.3V and 5V boards.

  3. Mount and test

    Fix it with two M2 screws so the lever is pressed right at the end of travel, with a little over-travel. Press the lever by hand and check the input changes before letting anything move.

Note: The switch has no DC power rating, so run motors, pumps or solenoids through a relay or MOSFET module, not straight through it. Mains wiring needs an enclosure and a licensed electrician.

Frequently Asked Questions

Answers to the questions buyers ask most.

Which pin is which?
On the numbered face, with the lever pivot on the left, pin 1 (at the pivot end) is COM and pin 3 (in the middle) is NO. The back face is moulded C and NO to match. Position 2 is NC, and it has no tab on this switch.
Normally open or normally closed: which do I need?
This switch is normally open only: the circuit closes while the lever is pressed. That suits most Arduino and ESP32 inputs. If your controller expects a normally closed endstop, so that a broken wire reads as triggered, choose the SC7301 3-pin lever switch, which has COM, NO and NC.
Will it work with a 3.3V board like an ESP32 or Raspberry Pi Pico?
Yes. The switch is a plain contact with no voltage of its own, so it works with 3.3V and 5V inputs. Connect pin 1 (COM) to GND and pin 3 (NO) to an input with a pull-up enabled. The input reads LOW while the lever is pressed.
How much can it switch?
The body is marked 5A at 125/250VAC, T85 (rated up to 85 C ambient). It has no DC power rating, so use it to signal a controller and switch DC motors, pumps or solenoids through a relay or MOSFET module. Mains wiring needs an enclosure and a licensed electrician.
What screws fit and how far apart are the holes?
The two mounting holes are 2.35 mm across and 9.5 mm apart, centre to centre, so M2 screws fit. Both holes sit 2.5 mm up from the terminal edge. The datasheet has a full dimensioned drawing.

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I'm Lukas, an engineering student and maker based in Te Awamutu. NZN grew out of a CNC build that dragged on for months because every missing cable, bolt or electronic part meant another overseas order. I started the shop so Kiwi makers can spend more time building and less time waiting for the next parcel.

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