Tactile Switches

Image Part Number Description / PDF Quantity Rfq
KSC441G 70SH LFS PF

KSC441G 70SH LFS PF

C&K

TACT 6.2 X 6.2, 5.1 MM H, 4.0N,

602

PTS645VK312LFS

PTS645VK312LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 12V

0

KSC471G 70SH LFS PF

KSC471G 70SH LFS PF

C&K

TACT 6.2 X 6.2, 5.1 MM H, 4.0N,

4945

K5V4WH43G

K5V4WH43G

C&K

SWITCH TACTILE SPDT 0.1A 32V

0

PTS125SK85-2 LFS

PTS125SK85-2 LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 12V

17753

KSC643JLFG

KSC643JLFG

C&K

SWITCH TACTILE SPST-NO 0.01A 32V

1656

KSC243GLFG

KSC243GLFG

C&K

SWITCH TACTILE SPST-NO 0.01A 32V

1250

KSA1M511 LFTR

KSA1M511 LFTR

C&K

SWITCH TACTILE SPST-NO 0.05A 32V

11091

PTS636 SP50 SMTR LFS

PTS636 SP50 SMTR LFS

C&K

TACT 6.0 X 3.5, 5.0 MM H, 320GF,

5493

PTS830GG140 SMTR LFS

PTS830GG140 SMTR LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 12V

7452

KSC401J 50SH LFS

KSC401J 50SH LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 32V

17942

KT11P2SM34LFS

KT11P2SM34LFS

C&K

SWITCH TACTILE SPST-NO 1VA 32V

7156

KMR421G LFS

KMR421G LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 32V

12536

PTS 647 SM50 SMTR2 LFS

PTS 647 SM50 SMTR2 LFS

C&K

TACT 4.5 X 4.5, 5.0 MM H, 1.8N,

942

SFS12WSSMTR LFS

SFS12WSSMTR LFS

C&K

SWITCH TACT SMT SEALED 970G

1388

PTS 647 SK50 SMTR2 LFS

PTS 647 SK50 SMTR2 LFS

C&K

TACT 4.5 X 4.5, 5.0 MM H, 2.5N,

7874

KSC4D1G 50SH LFS

KSC4D1G 50SH LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 32V

7651

PTS636 SK50 LFS

PTS636 SK50 LFS

C&K

TACT 6.0 X 3.5, 5.0 MM H, 250GF,

4753

KSC921J LFS

KSC921J LFS

C&K

SWITCH TACTILE SPST-NO 0.05A 32V

0

KXT 321 LHS

KXT 321 LHS

C&K

SWITCH TACTILE SPST-NO 0.02A 15V

27786

Tactile Switches

1. Overview

Tactile switches are momentary contact switches designed to provide tactile feedback when actuated. They are fundamental components in human-machine interfaces, enabling precise input registration through mechanical deformation. These switches play a critical role in modern electronics by ensuring reliable user interaction in devices ranging from consumer gadgets to industrial equipment.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
PCB Mount Tactile SwitchesLow profile, solderable terminals, short travel distanceRemote controls, mobile phones
Panel Mount Tactile SwitchesFront-panel installation, threaded bushingIndustrial control panels
Surface Mount Technology (SMT)Miniaturized, automated assembly compatibleWearable devices
Heavy Duty Tactile SwitchesHigh current rating, reinforced contactsMedical equipment

3. Structure and Components

Typical tactile switch construction includes: - Actuator: Dome-shaped plunger with textured surface - Contact System: Gold-plated phosphor bronze contacts - Housing: High-temperature resistant thermoplastic (e.g., LCP) - Spring Mechanism: Stainless steel leaf spring for tactile feedback - Terminals: Solder pins or surface-mount pads

4. Key Technical Specifications

ParameterTypical RangeImportance
Rated Current0.01-0.5ADetermines circuit compatibility
Operating Voltage5-250VDCSafety and insulation requirements
Actuation Force0.5-5.0NUser experience optimization
Electrical Life50,000-500,000 cyclesProduct longevity assessment
Contact Resistance10-100m Signal integrity maintenance

5. Application Fields

Primary industries include: - Consumer Electronics: Keyboards, gaming controllers - Industrial Automation: PLC control panels - Medical Devices: Patient monitoring systems - Automotive: Dashboard controls, steering wheel buttons - Telecommunications: Network equipment interfaces

Case Study: Apple Magic Keyboard uses SMT tactile switches with 0.8mm travel distance and 50cN actuation force for optimal typing experience

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
OmronB3F SeriesIP67 rating, 500,000 cycles life
C&K ComponentsPTS645 SeriesLow profile (3.2mm), RoHS compliant
E-SwitchTL1105 SeriesSurface mount, 0.1A rating
Alps AlpineSKQH SeriesClick-type feedback, 1.5N force

7. Selection Guidelines

Key considerations: - Electrical requirements (current/voltage ratings) - Mechanical specifications (actuation force, travel distance) - Mounting method compatibility (through-hole vs SMT) - Environmental factors (temperature range, ingress protection) - Cost-volume optimization for mass production

8. Industry Trends

Emerging developments include: - Miniaturization for wearable devices (sub-2mm packages) - Enhanced reliability for automotive applications (-40 C to 125 C operation) - Integration with haptic feedback systems - Adoption of eco-friendly materials (halogen-free plastics) - Smart switch development with embedded sensors

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