# FSM1LP (Component)
## Description
Tactile Switch SPST-NO Top Actuated Surface Mount
The FSM1LP is a surface-mount tactile (momentary) switch manufactured by TE Connectivity under the ALCOSWITCH series. It is a low-profile, top-actuated pushbutton switch designed for compact PCB applications requiring reliable user input.
This switch operates as a momentary SPST-NO (Single Pole Single Throw – Normally Open) device, meaning it only conducts when pressed and returns to open when released.
Key Features
Switch Type
Tactile momentary (OFF–(ON)) pushbutton
Contact Configuration
SPST-NO (Normally Open)
Mounting Type
Surface Mount (SMD) with gull-wing leads
Actuation Style
Top-actuated round button
Electrical Rating
50 mA @ 24 VDC
Operating Force
Approximately 1.57 N (~160 gf)
Low Profile Design
Compact height (~3–3.5 mm typical), suitable for slim devices
Mechanical Life
Around 100,000 cycles
Contact Material
Copper alloy with silver plating for reliable conductivity
Compact Size
Typically ~6 × 6 mm footprint
RoHS Compliant
Lead-free and environmentally compliant
tactile switch momentary 4 pin smd
#CommonPartsLibrary #Switch
## Component Details
- **Owner:** adrian95
- **Created:** 4/29/2026
- **Last Updated:** 4/29/2026
- **Visibility:** Public
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Manufacturer Name:** TE Connectivity
- **Part Type:** Electromechanical Components
- **Datasheet URL:** https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6
- **Manufacturer Part Number:** FSM1LP
- **Used in:** 25 projects
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/fsm1lp/te-connectivity.html?utm_currency=USD®ion=nac) | $0.1581 | 0 |
| [Mouser](https://www.mouser.com/ProductDetail/TE-Connectivity-PB/FSM1LP?qs=X41HXGMJECpfKcLAbtysig%3D%3D) | $0.31 | 14K |
| [Verical](https://www.verical.com/pd/te-connectivity-tactile-FSM1LP-870421?utm_currency=USD) | $0.195 | 28K |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** TE Connectivity
- **MPN:** FSM1LP
- **Mount Type:** Surface Mount
- **Package / Case Code:** KEY-SMD
- **Pin Count:** 5
- **Logic Function:** AND
- **Compliance:** Rohs, Lead Free
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | COM_1 | |
| 2 | COM_2 | |
| 3 | NO_1 | |
| 4 | NO_2 | |
| 5 | GND | |
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*Generated from [https://www.flux.ai/adrian95/fsm1lp](https://www.flux.ai/adrian95/fsm1lp)*