# Snap-Action Switch with 50mm Lever: 3-Pin, SPDT, 5A

**Type:** Product page · **SKU:** POLOLU-1403 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/snap-action-switch-with-50mm-lever-3-pin-spdt-5a.html ([markdown](https://core-electronics.com.au/snap-action-switch-with-50mm-lever-3-pin-spdt-5a.html.md))

This single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch, but the long lever arm makes it especially useful as a tactile bump sensor for your robot (e.g whiskers or antennae). The switch body dimension is 20.0 x 6.4 x 10.2 mm, and the lever arm is 50 mm long.

## Pricing

- **Price:** $4.55 (inc GST) — $4.14 AUD, exc GST
- **Quantity discounts:** 10+ $3.97 (exc GST) · 25+ $3.85 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 17 and Aug 19.

## Description

This single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch, but the 2"-long lever arm makes it especially useful as a simple tactile obstacle-detector for your robot. The switch body dimension is 20.0 x 6.4 x 10.2 mm (0.79" x 0.25" x 0.40"), and the lever arm is 50 mm (2") long. This three-pin switch can also be used as a two-pin single-pole, single-throw (SPST) switch that is open or closed by default, depending on which two pins are used.

| ![](https://core-electronics.com.au/attachments/localcontent/0J2217_23677a3fc44.png) |
|---|
| Dimensions (in mm) of snap-action switch with 50mm lever: 3-pin, SPDT, 5A. |

For a more sophisticated tactile sensor, see Pololu's [force-sensing resistors](https://core-electronics.com.au/force-sensing-resistor-0-6-diameter-circle.html).

**People often buy this product together with:**

| [![Snap-Action Switch with 16.7mm Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/attachments/localcontent/0J2201_33991dec13.jpg)](https://core-electronics.com.au/snap-action-switch-with-16-7mm-lever-3-pin-spdt-5a.html) | [Snap-Action Switch with 16.7mm Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/snap-action-switch-with-16-7mm-lever-3-pin-spdt-5a.html) |
|---|---|

| [![Snap-Action Switch with 16.3mm Roller Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/attachments/localcontent/0J10791_3504b277de.jpg)](https://core-electronics.com.au/snap-action-switch-with-16-3mm-roller-lever-3-pin-spdt-5a.html) | [Snap-Action Switch with 16.3mm Roller Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/snap-action-switch-with-16-3mm-roller-lever-3-pin-spdt-5a.html) |
|---|---|

| [![Snap-Action Switch with 15.6mm Bump Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/attachments/localcontent/0J2232_3587c48339.jpg)](https://core-electronics.com.au/snap-action-switch-with-15-6mm-bump-lever-3-pin-spdt-5a.html) | [Snap-Action Switch with 15.6mm Bump Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/snap-action-switch-with-15-6mm-bump-lever-3-pin-spdt-5a.html) |
|---|---|

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/n/snap_action_switch_with_50mm_lever_3_pin_spdt_5a__pololu_1403__00.jpg)