Keypad Switches

Image	Part Number	Description / PDF	Quantity	Rfq
	82-150-16 Grayhill, Inc.	SWITCH KEYPAD 1KEY ILLUM 0.1A 5V	0
	84SN-AB2-000 Grayhill, Inc.	SWITCH KEYPAD 12 KEY 0.01A 24V	0
	84BL-BB2-016CN Grayhill, Inc.	SWITCH KEYPAD 4X4,GRNMOUNTING NU	0
	82-601-91 Grayhill, Inc.	SWITCH KEYPAD 6 KEY 0.1A 5V	0
	84BN-BB1-022C Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	84BL-AB2-112CN Grayhill, Inc.	SWITCH KEYPAD 3X4,GRNOUNTING NUT	0
	84BL-BB1-016AN Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	84BB1-006 Grayhill, Inc.	KEYPAD LEGEND ALPHA/NUMERC 16BTN	0
	84LSN-FC2-302-N Grayhill, Inc.	SWITCH KEYPAD 4 KEY 0.01A 24V	0
	84SN-AB2-112 Grayhill, Inc.	SWITCH KEYPAD 12 KEY 0.01A 24V	0
	84R-BB2-014-CD Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	84SN-BC2-016-N Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	86BB2-006 Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	84LS-AC2-112-N Grayhill, Inc.	SWITCH KEYPAD 12 KEY 0.01A 24V	0
	86BC2-002 Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	3K042203 Storm Interface	SWITCH KEYPAD 4 KEY 0.05A 24V	0
	96AB2-102-FS Grayhill, Inc.	SWITCH KEYPAD 12 KEY 0.005A 12V	0
	84S-AC1-113-N Grayhill, Inc.	SWITCH KEYPAD 12 KEY 0.01A 24V	0
	86BC2-001 Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.01A 24V	0
	96BB2-056-RS Grayhill, Inc.	SWITCH KEYPAD 16 KEY 0.005A 12V	0

Keypad Switches

1. Overview

Keypad switches are electro-mechanical components designed to detect and transmit electrical signals through physical button presses. They serve as human-machine interface (HMI) elements in electronic devices, enabling user input control. These switches play a critical role in modern electronics by bridging mechanical actions with digital systems, supporting applications from consumer electronics to industrial automation.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Mechanical Switches	Physical contact-based actuation with tactile feedback	Industrial control panels, gaming consoles
Capacitive Switches	Contactless operation through capacitance changes	Smartphones, medical devices
Film Switches	Low-profile design with printed circuits on flexible substrates	Appliances, automotive dashboards
Membrane Switches	Sealed rubber/plastic layers with conductive ink contacts	Home automation, industrial equipment

3. Structure and Components

Typical keypad switch assemblies include: - Actuator: Physical button or touch-sensitive surface - Contact System: Conductive materials (gold, silver, carbon) for electrical connection - Actuator Return Mechanism: Spring or elastic material for reset - Insulation Base: PCB or polymer substrate - Environmental Seal: IP65+ rated protective layers Modern designs integrate EMI shielding and anti-static coatings, with materials like polycarbonate (PC) or ABS plastic for durability.

4. Key Technical Specifications

Parameter	Typical Values	Importance
Operating Force	0.5-5.0N	Determines tactile response and user comfort
Contact Resistance	0.1-100	Impacts signal integrity and power efficiency
Electrical Life	10,000-1,000,000 cycles	Directly affects product longevity
Operating Temperature	-40 C to +85 C	Ensures reliability in extreme environments
IP Rating	IP40-IP68	Defines protection against dust/moisture ingress

5. Application Fields

Consumer Electronics: Smartphones, remote controls, gaming peripherals
Industrial Automation: PLC control panels, CNC machine interfaces
Automotive: Infotainment systems, HVAC controls
Medical Devices: Patient monitors, infusion pumps
Aerospace: Cockpit control panels, avionics systems

6. Leading Manufacturers and Products

Manufacturer	Representative Products	Key Features
TE Connectivity	ALCO K1 Series	IP67 rating, 1 million cycle life
Omron	B3SK-1010	Low-profile design with 0.1N operating force
C&K Components	KMR119 Series	Gold-plated contacts, RoHS compliance
E-Switch	TL1105 Series	Surface-mount capability, -40 C to 125 C range

7. Selection Guidelines

Key considerations include: - Electrical Requirements: Current/voltage ratings must exceed system needs - Mechanical Durability: Expected actuation cycles vs. rated lifespan - Environmental Factors: Temperature extremes, chemical exposure - User Experience: Actuation force and tactile feedback optimization - Compliance: Certifications (UL, CE, RoHS) and industry standards For example, in automotive applications, selecting IP67-rated switches with vibration-resistant designs ensures reliability under harsh conditions.

8. Industry Development Trends

Current trends shaping keypad switch technology: - Miniaturization: Micro-switch designs for wearable devices (e.g., 2x2mm footprints) - Capacitive Integration: Hybrid switches combining mechanical and capacitive sensing - Haptic Feedback: Embedded piezoelectric elements for enhanced tactile response - Smart Switches: IoT-enabled switches with embedded sensors and wireless connectivity - Sustainability: Bio-based polymers and recyclable materials adoption The market is projected to grow at 5.8% CAGR through 2030, driven by automotive HMI and industrial IoT applications.