KMR221NGLFS

C&KExtended

-40℃~+85℃ 1.9mm 2.8mm 2N 32V 4.2mm 50mA Gull Wing Round Button SPST Surface Mount,Vertical SMD,4.2x2.8mm Tactile Switches ROHS

Datasheet JLCPCB LCSC

Part id: c-k/KMR221NGLFS
Category: Tactile Switches
Package: SMD,4.2x2.8mm
Pins: 4
In stock: 5,422 at JLCPCB (C269272)
Used on: 11 open-source boards

Overview

The KMR221NGLFS is a tactile Switche made by C&K in a SMD,4.2x2.8mm package with 4 pins. -40℃~+85℃ 1.9mm 2.8mm 2N 32V 4.2mm 50mA Gull Wing Round Button SPST Surface Mount,Vertical SMD,4.2x2.8mm Tactile Switches ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:KMR221NGLFS, from EasyEDA) and its footprint (EasyEDA_Cloud:KEY-SMD_4P-L4.2-W2.8-P1.60-LS4.6, from EasyEDA), ready for a KiCad board. 5,422 are in stock at JLCPCB (part C269272). 11 open-source boards in 9 repositories on GitHub use it.

Symbol

EasyEDA_Cloud:KMR221NGLFSFrom EasyEDA

Footprint

EasyEDA_Cloud:KEY-SMD_4P-L4.2-W2.8-P1.60-LS4.6From EasyEDA

Pinout

The pins of the KMR221NGLFS
Pin	Name	Type
1	1	Unspecified
2	2	Unspecified
3	3	Unspecified
4	4	Unspecified

Parameters

Actuator Style: Round Button
Circuit: SPST
Contact Current: 50mA
Length: 4.2mm
Mounting Type: Surface Mount,Vertical
Operating Force: 2N
Operating Temperature: -40℃~+85℃
Switch Height: 1.9mm
Termination Style: Gull Wing
Voltage Rating: 32V
Width: 2.8mm

Order codes

KMR221NGLFSLCSC C269272

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Open-source boards using it

11See all 11

2 layers40.8 × 24.2 mm
Athena pcb
JasonStoyanov/athena_pcb
PCB for the Athena project
37 parts1
2 layers40.8 × 80 mm
Devkit2
jacobjuneau6/devkit2
A compact ESP32-S3 development board designed for rapid prototyping and embedded projects.
13 partsMIT
2 layers301.2 × 140.8 mm
10133-04 Kicad Project
KeyDapt-LLC/BANANA-Lite
BANANA-Lite is a modified version of the BANANA keyboard by RGBKB.
108 partsGPL-3.0
4 layers40.9 × 87.5 mm
Hourglass PCBA
lopej212/Hourglass_PCA
PCA Design for Project Hourglass
134 parts
6 layers197.5 × 107.7 mm
MicroHard
MH-Flight-Simulator-X/PCB

193 parts
2 layers51.6 × 98 mm
Can module
nikita240/can-module

103 parts
4 layers73 × 50 mm
Tardigrade
nortismo/tardigrade
Open Hardware board with an embedded LPC55 MCU and a SX1262 LoRa transceiver
127 parts
2 layers290.3 × 95.7 mm
10087 Kicad
RGBKB/Keyboard-files
Public files for keyboards and more
393 parts113GPL-3.0

Parts like it

Questions

Is there a KiCad symbol and footprint for the KMR221NGLFS?

Yes. The symbol is EasyEDA_Cloud:KMR221NGLFS and the footprint EasyEDA_Cloud:KEY-SMD_4P-L4.2-W2.8-P1.60-LS4.6, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the KMR221NGLFS?

SMD,4.2x2.8mm, with 4 pins. Its footprint is drawn on this page.

Where is the KMR221NGLFS datasheet?

C&K publishes it: the Datasheet link on this page opens it.

Where can I order the KMR221NGLFS?

JLCPCB lists it as part C269272, with 5,422 in stock; the sellers' links on this page open their listings.

What can replace the KMR221NGLFS?

Parts like it in the library: the KMR241GLFS by C&K, the KMR621NGLFS by C&K, the KMR231NGULCLFS by C&K and the KMR231NGLFS by C&K. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the KMR221NGLFS?

11 boards in 9 repositories on GitHub; the most starred are listed on this page, with their KiCad files.