In the world of industrial automation and equipment manufacturing, the interface between human and machine must be intuitive, durable, and reliable. The SCJ19D1 Series Metal Push Button Switches—available in 16mm, 19mm, and 22mm mounting sizes—represent the pinnacle of engineering for modern control systems.
Whether you are designing CNC machinery, marine navigation panels, or heavy industrial equipment, this comprehensive guide will explain why the SCJ19D1 series deserves a place in your next project.
1. Series Overview: Flexibility in Form Factor
The SCJ19D1 series is designed with versatility at its core. Available in three standard mounting diameters, these switches accommodate various panel design requirements without compromising on performance.
| Specification | SCJ19D1 (16mm) | SCJ19D1 (19mm) | SCJ19D1 (22mm) |
|---|---|---|---|
| Mounting Hole | 16mm -0.1 | 19~19.2mm | 22~22.1mm |
| Switching Voltage | 1.5V~250V AC/DC | 1.5V~250V AC/DC | 1.5V~250V AC/DC |
| Current Rating | 18A (AC) / 15A (DC) | 18A (AC) / 15A (DC) | 18A (AC) / 15A (DC) |
| Waterproof Rating | IP67 (Button End) | IP67 (Button End) | IP67 (Button End) |
The 22mm variant has become the industry standard for industrial applications, while the 16mm and 19mm options provide space-saving solutions for compact control panels and instrumentation enclosures.
2. Key Technical Advantages
2.1 Robust Electrical Performance
With a switching voltage range of 1.5V to 250V AC/DC and impressive current handling capabilities (18A AC / 15A DC), these switches bridge the gap between low-voltage electronics and high-power industrial loads. The rated heating current ensures stable operation even under continuous use.
2.2 IP67 Protection for Harsh Environments
The IP67 waterproof rating at the button end means these switches are:
Dust-tight: Complete protection against dust ingress
Water-resistant: Withstands temporary immersion in water (up to 1 meter for 30 minutes)
This makes them ideal for outdoor equipment, food processing lines, marine applications, and any environment exposed to moisture or contaminants.
2.3 Extended Electrical Life
Rated for >30,000 cycles under full load (DC-13: 12V/24V 10A and AC-15: 110V/250V 15A), the SCJ19D1 series ensures long-term reliability. The silver alloy contacts maintain low contact resistance (<50mΩ), minimizing heat generation and power loss throughout the switch’s lifespan.
3. Design Options for Every Application
3.1 Actuator Styles
The series offers two distinct actuator profiles:
Flat Head (Code: P): Flush-mounted design that prevents accidental actuation—perfect for reset buttons or critical functions
High-head (Code: G): Raised profile for easy operation, even with gloved hands—ideal for start/stop controls in industrial settings
3.2 Housing Material Selection
Choose the material that best suits your environmental requirements:
SUS304 Stainless Steel: Excellent corrosion resistance for standard industrial use
Brass Nickel-plated: Enhanced conductivity with attractive appearance
Aluminum Alloy Anodized: Lightweight with superior wear resistance
3.3 Key Material
The actuator button is crafted from PC&SS316 (Polycarbonate with Stainless Steel 316), combining impact resistance with the corrosion protection demanded by marine and chemical processing environments.
4. Precision Engineering for Consistent Operation
4.1 Tactile Feedback
The SCJ19D1 series is engineered for operator confidence:
Operating Force: Approximately 2.5–4N—firm enough to prevent accidental activation, light enough for repetitive use
Button Travel: 3mm total travel with 1.5mm contact stroke, providing clear tactile and audible feedback upon actuation
4.2 Dimensional Precision
The detailed dimensional specifications (25±0.5mm body length, 7.8mm head height, 1.8±0.1mm terminal thickness) ensure consistent mounting and reliable panel fit across all units.
5. Application Spotlight: Where SCJ19D1 Excels
5.1 Industrial Machinery Control Panels
The 22mm variant is the standard choice for:
CNC machine controls
Conveyor system start/stop stations
Press and forming equipment
Packaging machinery
5.2 Marine and Offshore Equipment
With IP67 protection and SS316 key material:
Navigation system controls
Engine room panels
Deck equipment interfaces
5.3 Public Access Equipment
The 16mm and 19mm versions are ideal for space-constrained applications:
Vending machines
Ticketing kiosks
Access control systems
Elevator controls
5.4 Food and Beverage Processing
The IP67 rating allows for:
High-pressure washdown resistance
Sanitary design with smooth surfaces
Corrosion-resistant materials
6. Installation and Wiring
The SCJ19D1 series features 2-screw feet terminals for secure and reliable connections. The straightforward mounting process:
Drill the appropriate mounting hole (16mm, 19mm, or 22mm)
Insert the switch through the panel
Secure with the mounting nut (torque to specifications)
Connect wires to the screw terminals
The I/O switch combination provides simple on/off control functionality, while the internal schematic ensures proper wiring every time.
7. Quality Assurance
Manufactured by Wuhan Sukeji Intelligent Technology Co., Ltd., the SCJ19D1 series undergoes rigorous testing:
Dielectric Strength Testing: Ensures insulation integrity
Contact Resistance Measurement: Verified <50mΩ
Temperature Cycling: Validated from -30°C to 85°C
Mechanical Life Testing: Confirmed durability
Conclusion: The Smart Choice for Industrial Control
The SCJ19D1 Series Metal Push Button Switches combine robust construction, flexible design options, and proven reliability in a package that meets the demands of modern industry. With multiple mounting sizes, material choices, and actuator styles, these switches adapt to your specific application requirements while maintaining consistent performance.
For OEMs, system integrators, and facility maintenance teams, the SCJ19D1 series represents the ideal balance of quality, durability, and value.
