When designing industrial control panels, marine equipment, or heavy-duty machinery, selecting the right push button switch is critical. For applications demanding high current handling, robust construction, and reliable performance in harsh environments, the 16/19/22mm 20A High Current Short-body Metal Push Button Switch stands out as a premier solution. This comprehensive guide dives into its technical specifications, benefits, and ideal applications to help engineers and procurement specialists make an informed decision.
Overview: A Robust, High-Performance Switching Solution
This short-body metal push button switch is engineered for durability and high electrical performance. Its compact, low-profile design is ideal for panels with space constraints, while its metal housing and advanced sealing provide exceptional resistance to dust, water, and mechanical stress. Available in both maintained (self-locking) and momentary (self-resetting) versions, it offers flexibility for various control logic requirements.
Key Features at a Glance
High Current Rating: Handles up to 20A, suitable for demanding resistive and inductive loads.
Multiple Sizes: Available in compact 16mm, 19mm, and 22mm mounting diameters.
Short-body Design: Saves valuable space behind the panel.
Rugged Metal Housing: Constructed from SUS304/brass nickel-plated or anodized aluminum alloy for superior durability and EMI shielding.
High Waterproof Rating: Rated IP67 at the button terminal, ensuring reliable operation in wet or dusty conditions.
Wide Voltage Range: Compatible with switching voltages from 1.5V to 250V AC/DC.
Integrated Illumination: Features a customizable LED indicator with various voltage options and colors.
Detailed Technical Parameters & Specifications
For system integration and component verification, here is a detailed breakdown of the switch’s technical data:
| Parameter | Specification |
|---|---|
| Mounting Hole Diameter | 16~16.1mm, 19~19.1mm, 22~22.1mm |
| Switching Voltage | 1.5V ~ 250V AC/DC |
| Current Rating | Resistive Load: AC-15 110V/250V 7.5A Inductive Load: AC-15 110V/250V 1.25A; DC-13 12V/24V 5A |
| Rated Heating Current (Ith) | 20A @ 250VAC |
| Waterproof Rating | IP67 (Button Terminal) |
| Ambient Temperature | -30°C to +85°C |
| Form of Work | Self-locking (Maintained) / Self-resetting (Momentary) – Optional |
| Switch Combination | 1NO (Normally Open) |
| Lamp Bead Voltage | AC/DC: 3.9V, 6V, 9V, 12V, 24V, 36V, 48V, 110V, 220V |
| Lamp Bead Current | 2mA ~ 20mA |
| Contact Material | Silver Tin Oxide Alloy |
| Electrical Life | > 30,000 cycles (AC-15 110V/250V 7.5A) |
| Mechanical Life | > 1,000,000 cycles (DC-13 12V 0.5A) |
| Contact Resistance | ≤ 50mΩ |
| Actuation Force | Approx. 2.5N ~ 4N |
| Total Travel / Pretravel | 3mm key stroke / 1.5mm contact stroke |
| Insulation Strength | ≥ 100 MΩ @ 500V DC |
| Dielectric Strength | 2500V AC (between pins and housing) |
Design & Construction for Reliability
Housing & Key: The robust housing is made from SUS304, nickel-plated brass, or anodized aluminum alloy, offering excellent corrosion resistance. The button/key is constructed from PC (Polycarbonate) and SUS316 stainless steel, ensuring long-term visibility and wear resistance.
Base & Insulation: The base is made from modified nylon PA66, providing high dielectric strength and thermal stability. It ensures reliable insulation, withstanding 2500V AC between live parts and the housing.
Electrical Contacts: The use of silver tin oxide (AgSnO₂) alloy contacts ensures low contact resistance, minimal arcing, and high resistance to welding, which is crucial for the 20A current rating and inductive load switching.
Why Choose This High Current Metal Push Button?
Space-Efficient Powerhouse: The short-body design allows installation in shallow enclosures without compromising on the high 20A current capacity.
Built for Harsh Environments: The IP67 waterproof rating and wide -30°C to 85°C operating temperature range make it perfect for outdoor, marine, industrial, and agricultural applications.
Long Service Life: With an electrical life exceeding 30,000 cycles at full rated load and a mechanical life of over 1 million cycles, this switch guarantees longevity and reduces maintenance costs.
Enhanced Safety: High dielectric and insulation strength prevent leakage currents and breakdown, protecting both equipment and operators.
Clear Visual Indication: The bright, multi-color customizable LED provides unambiguous status feedback, even in well-lit areas.
Target Applications
This versatile switch is ideal for B2B and industrial applications where reliability under high electrical and environmental stress is paramount:
Industrial Control Panels: For motor starters, compressor controls, and heavy machinery.
Power Supply & Distribution Equipment: UPS systems, generator controls, and power switches.
Marine & Rail Equipment: Control consoles on boats, ships, and locomotives.
Agricultural & Construction Machinery: Tractor controls, excavator panels, and hydraulic systems.
Commercial Appliances: High-power professional kitchen equipment and industrial laundry machines.
Conclusion
The 16/19/22mm 20A High Current Short-body Metal Push Button Switch represents an optimal fusion of compact design, robust metal construction, and high electrical performance. Its detailed engineering, from the silver alloy contacts to the IP67 sealing, ensures it can withstand the demanding conditions of modern industrial applications. For engineers seeking a reliable, long-lasting, and space-saving switching solution for high-current circuits, this push button switch is an outstanding choice that balances technical excellence with practical design.
Ready to specify this component for your next project? Contact our technical sales team for detailed datasheets, CAD models, and samples to test in your specific application.
