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.

In fields such as smart homes, industrial equipment, and automotive electronics, the Rocker Switch has become a key component for circuit control, thanks to its characteristics of "easy operation, stable on-off performance, and flexible installation". Yueqing Tongda Wired Electric Factory, which has been deeply engaged in the switch industry for more than 30 years, focuses on the R\&D and precision manufacturing of Rocker Switches. It solves the scenario adaptation pain points of traditional rocker switches through technological innovation, provides safe and reliable control solutions for various industries, and has become an important force in promoting the localization upgrading of rocker switches.

Since its establishment in 1990, Yueqing Tongda has always taken "demand-driven product iteration" as its core concept. In the early days, it mainly focused on basic rocker switches. With the increasing demand for "high load capacity, anti-misoperation, and long service life" in equipment, the factory quickly listed the Rocker Switch as a core main product and set up a special R\&D team to tackle key challenges. After more than a decade of technical refinement, it has now formed a Rocker Switch product matrix covering 1A-32A current and 12V-380V voltage, which can meet the diverse control needs of equipment ranging from household sockets and kitchen appliances to industrial control cabinets and automotive circuits.

Technological breakthrough is the core competitiveness of Yueqing Tongda's Rocker Switches. Aiming at the pain points of traditional rocker switches, such as "easy contact ablation, weak protection performance, and prone to jamming during pressing", the R\&D team has carried out targeted optimizations: In terms of contact design, silver-tin alloy material is used and treated with high-temperature curing to reduce contact resistance, increasing the electrical service life of the switch to more than 200,000 times, far exceeding the industry's conventional standard of 100,000 times; In terms of protection structure, an innovative "double-layer sealing rubber strip" design is adopted, and some products have reached IP67 protection level, which can work stably in humid and dusty environments; In terms of operation experience, by precisely calibrating the angle of the rocker shaft, the pressing stroke is controlled within 1.2-1.5mm, ensuring clear on-off feedback without jamming.

To meet the characteristics of segmented industries, the factory provides flexible customized services. For the smart home field, it has launched an "indicator-equipped model" that supports warm light and cool light dual-color adjustment, which can feedback the circuit on-off status in real time; For the industrial field, it has developed a "high-load model" with a flame-retardant PA66 shell that can withstand a large current of 32A, suitable for high-power equipment such as motors and frequency converters; For the automotive electronics field, it has created a "high and low temperature resistant model" that can operate normally in an environment of -40℃ to 120℃, meeting the needs of automotive circuit control. Previously, the Rocker Switch customized for an automotive parts enterprise, relying on its "shock resistance + fast on-off" features, helped the enterprise's products pass strict automotive environment tests and secured a long-term cooperation order.

Quality control runs through the entire production process of Rocker Switches. In the raw material link, metal contacts and flame-retardant plastics that meet RoHS standards are carefully selected, and each batch undergoes anti-aging and breakdown resistance tests; In the production link, fully automated assembly lines and laser welding technology are introduced to control the component size error within 0.02mm, avoiding performance deviations caused by manual operations; In the testing link, each switch must pass the "200,000-time pressing life test, insulation resistance test, and high-low temperature cycle test" to ensure a 100% factory qualification rate. With strict quality control, the products have passed authoritative certifications such as UL, VDE, and CQC, and become qualified suppliers for enterprises such as Midea, Supor, and Joyoung.

Facing the industry trend of "intelligence and low power consumption", Yueqing Tongda is accelerating the technological upgrading of Rocker Switches. On the R\&D side, it is exploring the integration of Bluetooth modules into rocker switches to realize the integration of "remote control + status feedback"; On the production side, it is promoting the construction of "digital workshops" and realizing real-time traceability of production data through the MES system, improving production efficiency by 22%. In the future, the factory will continue to take the Rocker Switch as the core, adhere to the concept of "precision manufacturing and safety first", provide more adaptable and reliable control components for global customers, and promote the innovative development of the rocker switch industry.

In fields such as industrial control, household appliances, and security equipment, the Button Switch (pushbutton switch) is a basic control component for realizing "one-click start-stop". Its operational stability and environmental resistance directly affect the operational safety of equipment. Yueqing Tongda Wired Electric Factory, which has been deeply engaged in the switch industry for more than 30 years, focuses on the R\&D and manufacturing of Button Switches. It solves control pain points in different scenarios through technological innovation, provides highly adaptable button switch products for various industries, and has become an important force in promoting the localized application of button switches.

Since its establishment in 1990, Yueqing Tongda has always built its product system based on "demand orientation". In the early days, it mainly focused on general-purpose switches. With the upgrading of industrial automation and the popularization of smart home appliances, the market demand for Button Switches with "durability, anti-misoperation, and multiple specifications" has become increasingly urgent. The factory quickly listed Button Switch as a core main product, set up a special R\&D team, and after years of technological iteration, has formed a product matrix covering 1A-20A current and 12V-380V voltage. This matrix can meet the diverse control needs of equipment ranging from small household appliances to heavy industrial machinery.

Technological innovation is the core competitiveness of Yueqing Tongda's Button Switches. Aiming at the pain points of traditional button switches, such as "short pressing life, vulnerability to environmental interference, and high risk of misoperation", the R\&D team has carried out targeted optimizations: In terms of contact design, silver-nickel alloy material is used and treated with vacuum coating to reduce the contact oxidation rate, increasing the switch's pressing life to more than 150,000 times, far exceeding the industry's conventional standard of 100,000 times; In terms of protection performance, some products have reached IP67 protection level, which can work stably in environments with temperatures ranging from -30℃ to 90℃, as well as humid and dusty conditions.

To meet the characteristics of segmented industries, the factory provides flexible customized services. For the industrial field, it has developed a "high-current model" that supports 16A high-current on-off, meeting the high-power control needs of motor start-up and other scenarios; For security equipment, it has launched a "luminous model" that uses a fluorescent material coating to enable quick operation in dark environments. Previously, the Button Switch customized for an industrial equipment enterprise, relying on its "shock resistance + anti-misoperation" features, helped reduce the failure rate of the enterprise's production line by 25% and secured a long-term cooperation order.

Quality control runs through the entire production process of Button Switches. In the raw material link, copper materials and engineering plastics that meet RoHS standards are carefully selected, and each batch undergoes anti-aging and corrosion resistance tests; In the production link, fully automated stamping and assembly equipment is introduced to control the component size error within 0.01mm, avoiding performance deviations caused by manual operations; In the testing link, each switch must pass the "pressing life test, insulation resistance test, and high-low temperature cycle test" to ensure a 100% factory qualification rate. With strict quality control, the products have passed UL, VDE, and CQC certifications and become qualified suppliers for enterprises such as Midea and Gree.

Facing the industry trend of "intelligence and low power consumption", Yueqing Tongda is accelerating the technological upgrading of Button Switches. On the R\&D side, it is exploring the integration of wireless communication modules into button switches to realize the integration of "remote control + status feedback"; On the production side, it is promoting the construction of "digital workshops" and realizing real-time traceability of production data through the MES system, improving production efficiency by 18%. In the future, the factory will continue to take the Button Switch as the core, adhere to the concept of "precision manufacturing", provide more reliable and intelligent control components for global customers, and promote the innovative development of the button switch industry.