Keylock Switches

Part Number	Description / PDF	Quantity
LK68NB126N3 APEM Inc.	SW KEYLOCK DPDT 4A 125V CHROME	1108
LK5FNB126N3 APEM Inc.	SW KEYLOCK DP3T 4A 125V CHROME	0
LK67NB126N3 APEM Inc.	SW KEYLOCK SP3T 4A 125V CHROME	0
LK5ENB126N3 APEM Inc.	SW KEYLOCK SP3T 4A 125V CHROME	1741
LK6NNB126N3 APEM Inc.	SWITCH KEYLOCK 2POS SPDT 4A 125V	121
LK6FNB126N3 APEM Inc.	SW KEYLOCK DP3T 4A 125V CHROME	0
LK6JGB126M3 APEM Inc.	SWITCH KEYLOCK 3POS DP3T 4A 125V	46
LK6RNB126N3 APEM Inc.	SW KEYLOCK SPDT 4A 125V CHROME	51
LK6CNB126N3 APEM Inc.	SW KEYLOCK SP3T 4A 125V CHROME	0
LK6PNB126N3 APEM Inc.	SW KEYLOCK SPDT 4A 125V CHROME	0
LK6ENB126N3 APEM Inc.	SW KEYLOCK SP3T 4A 125V CHROME	0
LK6DNB126N3 APEM Inc.	SW KEYLOCK DP3T 4A 125V CHROME	0
PLKB4120 APEM Inc.	SWITCH KEYLK 2POS DPDT 500MA 30V	0
PLKB4220 APEM Inc.	SWITCH KEYLK 2POS DPDT 500MA 30V	0
PLKB3220 APEM Inc.	SWITCH KEYLK 2POS SPDT 500MA 30V	0
PLKB3120 APEM Inc.	SWITCH KEYLK 2POS SPDT 500MA 30V	0
PLKB8321 APEM Inc.	SWITCH KEYLK 3POS SPDT 500MA 30V	0
JD7510E APEM Inc.	SWITCH KEYLOCK 3POS SP3T 4A 125V	0
JD7510A APEM Inc.	SWITCH KEYLOCK 2POS SPDT 4A 125V	0
JD7509Q APEM Inc.	SWITCH KEYLOCK 2POS DPDT 4A 125V	0

Keylock Switches

1. Overview

Keylock switches are electro-mechanical control devices requiring a physical key for operation. They serve as critical safety components in systems requiring authorized access control. These switches prevent unauthorized operation in industrial machinery, power systems, and security equipment, playing a vital role in modern safety protocols and equipment management systems.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Mechanical Keylock	Physical key actuation, mechanical contacts	Industrial equipment start/stop controls
Electronic Keylock	Keycode verification, programmable access	Data center server racks
Smart Keylock	RFID/NFC integration, remote monitoring	Smart building automation systems

3. Structure and Components

Typical construction includes:

Actuator mechanism with key slot
Multi-position rotary switch contacts
Die-cast zinc or polymer housing
Electrical terminals (screw/clamp type)
Anti-tamper mechanical detents

Advanced models incorporate PCB-based electronic verification modules with LED status indicators.

4. Key Technical Specifications

Parameter	Typical Values	Importance
Rated Current	1-10A	Determines load capacity
Operating Voltage	12-480VAC/DC	System compatibility
Mechanical Life	50,000-200,000 cycles	Durability indicator
IP Rating	IP40-IP67	Environmental protection
Key Differentiation	100-10,000 combinations	Security level

5. Application Fields

Industrial control systems (CNC machines, robotics)
Power distribution equipment (switchgear, transformers)
Transportation (vehicle ignition systems, railway controls)
Medical equipment (MRI machines, sterilization units)
Security systems (alarm panels, access control)

Case Study: Automotive manufacturing plants use IP67-rated keylock switches for robotic arm controls, requiring both safety and washdown resistance.

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Siemens	3SE5 Series	Modular design, 1000+ key combinations
Omron	TL-N Series	Micro-switch technology, vibration resistance
Schneider Electric	XKCS Series	Programmable electronic locking

7. Selection Recommendations

Assess environmental conditions (temperature, moisture, vibration)
Calculate electrical load requirements
Determine security level needs (mechanical vs electronic)
Verify mounting compatibility (panel cutout dimensions)
Evaluate key management system requirements

8. Industry Trends

Current developments include:

Integration with IoT systems for remote access monitoring
Nanocoating for enhanced corrosion resistance
Miniaturization while maintaining IP67 ratings
Adoption of wireless key authentication protocols
Standardization under ISO 14119 safety regulations