On the battlefield of industrial equipment control panels, where space is measured in square inches, a component with a diameter of just 22 millimeters plays the most critical role in human-machine interaction. Recently, Yueqing Tongda Cable Factory, focusing on its core product series of 22mm Push Button, has once again demonstrated its deep R\&D strength and market insight in the industrial control interface sector.

This 22mm push button is far from an ordinary "switch." It features a high-strength zinc alloy die-cast housing with a precision sandblasted, electroplated, or anodized surface, offering excellent corrosion resistance and wear durability. It reliably withstands oil, impact, and high-frequency operation common in industrial settings. Its core modular design philosophy is key to its market success.

"The button, as we see it, is not just a circuit breaker but a reliable communication link between the equipment and the operator," explained a product manager at Tongda. "Our 22mm platform offers almost limitless possibilities." Customers can freely select the button head color (red, yellow, green, blue, etc.), material (metal, illuminated plastic), legend (laser engraved, custom icon), and most importantly—the operational function: such as normally open/closed, maintained/momentary, emergency stop function, or even integrated LED indicators for status visualization.

This high degree of customization allows Tongda's 22mm push buttons to be seamlessly integrated into various equipment, from heavy-duty CNC machines and automated production lines to smart power distribution cabinets and packaging machinery. An automation equipment integrator from Suzhou commented, "A single production line might require hundreds of buttons. Tongda's products are not only stable in quality, but more importantly, their flexible configuration solutions allow us to quickly 'customize' control panels for different functions, significantly shortening our R\&D cycle."

Beyond robustness and flexibility, safety and usability are also prioritized in the design. The products comply with international electrical standards, feature universal quick-connect or screw terminal installation, and offer a protection rating of up to IP67, ensuring stable operation even in harsh environments and preventing the risk of accidental operation.

Facing new demands for equipment intelligence under Industry 4.0, Yueqing Tongda Cable Factory is committed to further integrating traditional buttons with sensing technology, developing smart buttons with network signal feedback. This aims to transform the classic 22mm circular interface into a touchpoint connecting to the digital factory.

Yueqing, China, October 7th , 2025 – In the field of electronic components, while small, the micro switch is a key component for precise control and ensuring safe operation in numerous devices. Recently, reporters learned from Wenzhou Tongda Electric Co., Ltd. in Yueqing that leveraging years of technical expertise and lean production in the micro switch field, its core product series—the 12V Micro Switch—has performed exceptionally well in the market. It has gained high recognition from clients in various sectors including home appliances, automotive electronics, and smart home systems, with order volumes showing steady and continuous growth.

Focus and Innovation: Building Stable and Reliable 12V Micro Switches

Located in Yueqing, Zhejiang, renowned as the "Capital of Electrical Equipment in China," Wenzhou Tongda Electric Co., Ltd. benefits from a rich industrial ecosystem that fosters its development. Since its establishment, the company has consistently focused on the R\&D, manufacturing, and sales of micro switches. In response to the growing market demand for low-voltage, high-safety switches, Tongda Electric has strategically positioned its 12V DC micro switch series as a key product line.

"Micro switches with a 12V rating are primarily used in scenarios requiring safety extra-low voltage, such as various control units inside automobiles, children's toys, low-voltage smart home devices, and portable electronic instruments," explained the technical manager of Wenzhou Tongda Electric. "These applications demand not only the basic switching function from the component but also place stringent requirements on aspects like contact resistance, mechanical life, and environmental adaptability (e.g., heat resistance, dust protection)."

To meet these demands, Tongda Electric has established a professional R\&D team and implemented multiple optimizations in material selection, structural design, and production processes. The 12V micro switches produced by the company utilize highly conductive silver alloy contacts, ensuring low contact resistance and stable current transmission. The precise spring mechanism and housing design grant the product a mechanical lifespan of over millions of cycles, significantly exceeding the industry average.

A Development Philosophy Rooted in Quality and Service

In a highly competitive market, quality is paramount. Wenzhou Tongda Electric deeply understands this principle and has established a comprehensive quality control system spanning from raw material inspection to finished product shipment. Every batch of 12V micro switches undergoes rigorous testing, including continuity tests, dielectric strength tests, mechanical life tests, and environmental simulation tests, ensuring that each unit delivered to customers performs stably and reliably.

"We understand that a seemingly insignificant micro switch can impact the entire system's operation and end-user safety. Therefore, we dare not be the slightest bit negligent," stated the Sales Director of Tongda Electric. "Beyond robust product quality, we are committed to providing flexible and efficient customer service. We can offer customized switch solutions based on specific client requirements, including adjustments to contact rating, actuation force, and dimensions, to perfectly match our clients' product designs."

Future Outlook: Seizing New Opportunities in the Wave of Intelligentization

With the rapid development of the Internet of Things, smart homes, and automotive electronics, micro switches, as fundamental actuation components, are facing a broader market space. Wenzhou Tongda Electric stated that the company would seize these contemporary opportunities by consolidating its existing market share for 12V micro switches while continuously increasing R\&D investment. The focus will be on exploring intelligent, modular, and highly integrated directions.

Looking ahead, Tongda Electric plans to develop intelligent micro switches that integrate sensing and switching functions to meet the market's future need for higher-level automated control. The company will continue to uphold its business philosophy of "Continuous Improvement, Customer First," striving to become a trusted provider of micro switch solutions for domestic and international clients, contributing its share to "Intelligent Manufacturing in China."

In the intricate world of industrial control and electrical components, a seemingly small yet critically important product is quietly driving industry transformation—the Micro Switch 16a developed by Yueqing Tongda Cable Factory. With its exceptional load capacity, high-precision structure, and long-life performance, this product has become an "invisible guardian" in household appliances, industrial equipment, new energy vehicles, and smart control systems.

As an enterprise with over three decades of expertise in wired electrical manufacturing, Yueqing Tongda has always regarded technological innovation and quality control as its core competencies. This micro switch 16a features high-strength silver alloy contacts and a specialized spring system, capable of handling currents up to 16 amps with a mechanical lifespan exceeding 10 million operations—far surpassing industry averages. Its sealed design supports an IP65 protection rating, effectively resisting dust, oil, and humid environments, significantly enhancing the safety and reliability of host equipment.

"In automated equipment, micro switches may be small, but they play a critical role in signal detection, position control, and safety interruption," the company's R\&D director stated in an interview. "Our 16A product not only excels in electrical performance but also incorporates modular design concepts, supporting horizontal, vertical, and multi-angle installations, greatly expanding customer application scenarios."

In terms of market applications, the switch has already been successfully adopted by several well-known home appliance brands, CNC machinery manufacturers, and new energy vehicle companies. A equipment engineer from Zhuhai noted: "In long-term, high-frequency automated production lines, Yueqing Tongda's micro switches exhibit nearly zero failure rates. Their contact stability and mechanical endurance are truly impressive."

With the ongoing smart upgrading of industries and increasing household appliance energy efficiency standards, demand for high-load, long-life micro switches continues to rise. Yueqing Tongda employs fully automated production lines combined with stringent raw material inspection and finished product aging tests to ensure every switch meets international safety certification standards (including CCC, CE, UL) from raw materials to final exit from factory.

Looking ahead, the company plans to integrate IoT sensing technology with traditional switch components to develop a new generation of intelligent detection micro switches, further expanding applications in smart manufacturing, new energy, and smart home fields. Yueqing Tongda is demonstrating the reliability and innovation of "Intelligent Manufacturing in China" to the global market with its commitment to "precision in miniature components."

In smart home sensing, industrial equipment limit control, and security alarm systems, Micro Switch No serves as the "key to trigger response", and its on-off sensitivity directly affects equipment start-stop and safety early warning. Yueqing Tongda Wired Electric Factory, which has been deeply engaged in the switch field for more than 30 years, focuses on the specialized R\&D of Micro Switch No. It solves the pain points of traditional products such as "trigger delay and poor environmental resistance", providing stable and reliable control solutions for multiple industries.

Yueqing Tongda lists Micro Switch No as a core main product, driven by in-depth insights into industry needs. Traditional normally open micro switches often suffer from poor contact and trigger stroke deviation, leading to sensing failure of smart door locks and misjudgment of industrial machinery limits. To address this, the R\&D team has made targeted optimizations: the contacts are made of silver-palladium alloy and processed through vacuum coating technology to reduce contact resistance, controlling the trigger response time within 0.02 seconds; an innovative "micro dual-spring structure" is adopted, and the trigger stroke error is reduced to ±0.05mm through laser calibration, meeting the control needs of precision equipment. Meanwhile, the shell is made of flame-retardant PA66 material, reaching IP65 protection level, which can work stably in environments ranging from -40℃ to 85℃.

Scenario-based customization enhances the product's competitiveness. For the smart home field, a "low-power model" is launched with a standby power consumption as low as 3μA, meeting the long battery life needs of wireless sensing devices; for the industrial field, a "shock-resistant model" is developed, using a zinc alloy base that can withstand high-frequency vibrations of 1000Hz, suitable for machine tool limit control; the special model for security systems strengthens trigger stability, allowing quick circuit closure with a slight external force, and its response speed is 30% faster than traditional products. Previously, the Micro Switch No customized for a smart security enterprise helped reduce the false alarm rate of its alarm system by 50%, securing a long-term cooperation order.

Quality control runs through the entire production process. In the raw material link, each batch of silver-palladium alloy contacts must pass spectral testing; in the production link, fully automated assembly equipment ensures that the component error is ≤ 0.01mm; in the finished product link, each switch must undergo 100,000 pressing tests and high-low temperature cycle tests, with a qualification rate of 100%. Currently, the product has passed UL and CQC certifications and become a qualified supplier for enterprises such as Midea and Haier, continuously empowering safety control in multiple scenarios.

In scenarios such as industrial equipment emergency stop, medical instrument safety circuits, and security system triggering, Push Button NC (Normally Closed Pushbutton Switch) serves as the "first line of safety defense". Its on-off reliability is directly related to equipment and personal safety. Yueqing Tongda Wired Electric Factory, which has been deeply engaged in the switch field for more than 30 years, has broken the pain points of traditional products such as "slow power-off response and weak environmental resistance" through specialized R\&D on Push Button NC, providing stable and reliable safety control solutions for multiple industries.

Yueqing Tongda lists Push Button NC as a core main product, driven by in-depth insights into the industry's safety needs. Traditional normally closed pushbutton switches often suffer from "power-off delay" due to contact oxidation and spring fatigue, which easily causes safety hazards in industrial emergency stop scenarios. To address this, the factory's R\&D team has made targeted optimizations: the contacts are made of silver-nickel alloy and processed through vacuum welding technology to reduce contact resistance, ensuring the power-off response time is controlled within 0.01 seconds; the springs are made of fatigue-resistant stainless steel, which maintains stable elasticity even after 100,000 pressing tests, far exceeding the industry standard of 80,000 times. Meanwhile, the innovative "dust-proof and waterproof integrated shell" design enables the product to reach IP65 protection level, allowing it to work stably for a long time in dusty and humid industrial workshops.

Scenario-based adaptation enhances the market competitiveness of Push Button NC. For the industrial field, a "locked model" is launched, which requires rotation to reset after being pressed to avoid accidental touch causing equipment restart; for medical equipment, a "mute model" is developed, which controls the operation noise below 30 decibels through a silicone buffer structure, adapting to the quiet environment of hospital wards; the special model for security systems optimizes trigger sensitivity, allowing quick circuit cut-off with a slight press, and its response speed is 20% faster than traditional products. Previously, the emergency stop Push Button NC customized for an auto parts factory, relying on its "fast response + shock resistance" features, helped reduce the safety accident rate of its production line by 40%.

Quality control is the core of product reputation. Yueqing Tongda has established a full-process standard from raw material selection to finished product delivery: each batch of contacts must pass component spectral testing; fully automated assembly equipment is used in the production process to ensure the dimensional error is ≤ 0.02mm; finished products must undergo high-low temperature cycle tests and insulation resistance tests, with a qualification rate of 100%. Currently, its Push Button NC has passed UL and CQC certifications and become a qualified supplier for enterprises such as Gree and Midea, continuously empowering safety control in various industries.

In the field of precision control such as smart home sensors, industrial automation equipment, and medical monitoring instruments, a micro switch with a volume of only a few cubic centimeters directly determines the response accuracy and operational safety of the equipment. Yueqing Tongda Wired Electric Factory, which has been deeply engaged in the switch industry for more than 30 years, relies on its dedicated R\&D and precision manufacturing of Micro Switches. It not only breaks through the pain points of traditional products such as "short service life, vulnerability to interference, and poor scenario adaptability" but also builds a precision control solution covering multiple industries, becoming a core supplier in the domestic Micro Switch field.

Looking back at its development history, the in-depth integration of Yueqing Tongda with Micro Switches stems from its keen capture of market demand. When the factory was established in 1990, it mainly produced general-purpose switches. However, as electronic equipment upgraded towards "miniaturization and high precision", traditional switches gradually failed to meet the strict requirements of medical, industrial and other fields due to large trigger errors and weak environmental resistance. Since 2010, Yueqing Tongda decisively listed Micro Switches as its core main product and set up a 10-person special R\&D team. It made breakthroughs one by one in contact material, structural design and protection technology. After 5 years of iteration, it finally formed a product matrix covering 1A-5A current and 3V-250V voltage, which is suitable for more than 20 scenarios ranging from smart door lock buttons to industrial machinery limit control.

Technological innovation is the "key to breaking the situation" for Yueqing Tongda's Micro Switches. Aiming at the industry problems of traditional micro switches such as "contact oxidation leading to failure and unstable trigger stroke", the R\&D team proposed targeted solutions: the contacts are made of high-purity silver-palladium alloy, which is treated by vacuum sputtering process to reduce the oxidation rate by 60%, increasing the electrical service life of a single switch from the industry's conventional 300,000 times to 500,000 times; in terms of structure, an innovative "dual-spring sheet linkage design" is adopted, and the trigger stroke error is controlled within ±0.05mm through laser calibration. Even in a low-temperature industrial environment of -40℃, it can still maintain an accurate trigger range of 0.1-0.3mm. What's more noteworthy is that its independently developed "dust-proof and splash-proof sealing process" enables some Micro Switches to reach IP67 protection level, successfully solving the waterproof problem in scenarios such as kitchen appliances and outdoor sensors.

Scenario-based customization makes Yueqing Tongda's Micro Switches more attractive in the market. For the smart home field, it has launched a "low-power model" with a standby power consumption as low as 5μA, which meets the long battery life needs of wireless smart devices; for medical equipment, it has developed a "mute model", which controls the trigger noise below 25 decibels through a silicone buffer structure to avoid interfering with the ward environment; the "shock-resistant model" dedicated to the industrial field uses a zinc alloy shell and shock-proof springs, which can withstand high-frequency vibrations of 1000Hz and has been widely used in the limit control of CNC machine tools. Previously, the Micro Switch customized for a medical equipment enterprise for heart rate monitors, relying on its "high-precision trigger + medical-grade environmentally friendly materials", helped the product pass the EU CE certification and successfully enter the European market.

Strict quality control is the guarantee of product reputation. In the production workshop of Yueqing Tongda, Micro Switches need to go through "three tests": in the raw material link, each batch of silver-palladium alloy contacts must pass component spectral testing; in the production link, fully automated assembly equipment controls the component assembly error within 0.01mm; in the finished product testing link, each switch must complete 500,000 press tests, 72-hour high-low temperature cycle tests and insulation resistance tests to ensure a 100% factory qualification rate. Today, its Micro Switches have passed three major international certifications: UL, VDE and CQC, and have become long-term suppliers for well-known enterprises such as Midea, Haier and Germany's Augan.

Facing the industry trend of "intelligence and miniaturization", Yueqing Tongda is accelerating the technological upgrading of Micro Switches. At present, the R\&D team has launched the "Micro Switches with Integrated Sensor Function" project, planning to integrate the pressure sensing module into the switch to realize the integration of "control + data collection"; on the production side, it is promoting the construction of a "digital workshop", realizing the whole-process traceability from raw materials to finished products through the MES system, and improving production efficiency by 25%. In the future, Yueqing Tongda will continue to focus on Micro Switches as its core, deepen its presence in the precision control field, and provide more intelligent and reliable core components for global customers.