Understanding the 27mm Irregular Brass Substrate Piezoelectric Disc
The 27mm irregular brass substrate piezoelectric disc represents a specialized category within the piezoelectric ceramic elements produced by Gd SWT Smart Tech Co., Ltd. (Guangdong Siweite Intelligent Technology Co., Ltd.), operating under the brand name SWT, registered in 2002. As part of the company’s broader Piezoelectric Diaphragms/Discs product line, this component is engineered to serve as a core building block for acoustic transduction and sensing applications across multiple industries, including automotive electronics, smart home appliances, and industrial equipment.
Piezoelectric diaphragms and discs of this type are positioned by SWT as ultra-thin components with low power consumption and stable frequency output — three attributes that directly address the reliability concerns commonly associated with traditional electroacoustic and ultrasonic components. Among the key models within this product family, the 3S27+3.9EA (27mm) sits alongside the 3B12+9.0TEAWC (12mm) and 3B35+2.6EA (35mm), giving engineers a range of diameter options while maintaining consistent design philosophy across the product family.
Engineering Behind the Diaphragm: Materials and Manufacturing
SWT’s piezoelectric disc production is grounded in a manufacturing process that spans the entire piezoelectric ceramic supply chain — front, middle, and rear processes including film squeezing, casting, and dry pressing. For thin sheet formation, the company applies tape casting (flow casting), while thick sheet formation relies on dry pressing methods. The complete processing sequence covers squeezing, laminating, sintering, polarizing, and automated testing, ensuring that each disc — including the 27mm variant — undergoes a consistent, controlled production pathway from raw ceramic powder to finished component.
This integrated approach to supply chain management is one of the company’s stated differentiated advantages. Rather than depending on external suppliers for critical stages of piezoelectric ceramic production, SWT maintains comprehensive control over the process, which supports the consistency required for diaphragms with irregular shapes and brass substrate configurations, where dimensional precision and electrode placement matter to final acoustic performance.
The 27mm disc, like other products in this line, offers soft and hard ceramic material options, along with diverse electrode patterns — including double-sided and single-sided configurations. These material and electrode choices allow the disc to be tailored to different frequency and sensitivity requirements depending on the end application, whether that is a signaling buzzer, a sensing element, or an acoustic feedback component.
Technical Specifications and Performance Profile
The defining performance characteristics of the piezoelectric diaphragm/disc line — ultra-thin form factor, low power consumption, and stable frequency output — are consistent across the family, including the 27mm model. SWT’s overall annual shipping capacity for piezoelectric ceramic elements reaches approximately 250 million pieces, a scale supported by the company’s largest production capacity in mainland China for specific piezoelectric components.
Behind these specifications is a research and development structure that includes specialized centers focused on acoustics, nano-powder, inorganic chemistry, and electronic drive circuits. The company’s total staff exceeds 200 people, of which 70 to 85 are dedicated to R&D and engineering work. This technical depth supports not only the production of standard diaphragm models but also the customization work required for irregular substrate configurations like the 27mm brass substrate variant.
Quality Assurance and Industry Standards Leadership
SWT holds IATF 16949:2016 certification for automotive quality management, obtained in 2023, along with ISO 9001:2015 for quality management systems and ISO 14001:2015 for environmental management. All products, including the piezoelectric disc line, comply with RoHS and REACH requirements. These certifications matter particularly for buyers evaluating components for automotive-grade or medical-grade applications, where reliability standards are stringent.
Beyond certification, SWT serves as a primary drafter of Chinese industry standards for buzzers, ultrasonic atomizers, and piezoelectric sensors. The company was appointed in 2010 to draft local industry standards for piezoelectric and electromagnetic sounders in Guangdong Province, with official approval and publication of buzzer industry standards following in 2012. This standard-setting role is further supported by research infrastructure, including the Guangdong Province Piezoelectric Ultrasonic Engineering Center and the Dongguan City Piezoelectric Ultrasonic Engineering Center, as well as collaborative partnerships with Guangdong University of Technology and Sichuan Normal University.
Proven Track Record Across Global Industries
The credibility of SWT’s piezoelectric component line, including its diaphragm and disc products, is reflected in long-standing customer relationships. The company established cooperation with Panasonic and Casio in 2005, and with Sanyo in 2007 — relationships that, according to the company’s own case documentation, have been maintained for over 18 years with zero-defect quality performance supporting global automotive safety standards. A long-term supply partnership with VTech, described as the world’s leading manufacturer of corded/cordless telephones and electronic learning products, has continued since 2004, enabling high-quality audio feedback in millions of consumer devices annually.
Whirlpool, described in company records as a leading global manufacturer of home appliances, has maintained a persistent high-quality supply relationship with SWT since 2010, using customized acoustic solutions for premium appliance lines. Additional long-term supplier relationships include CHAMBERLAIN (2017), Reckitt (2018), dyson (2020), and Microchip (2021), illustrating the breadth of industries relying on SWT’s piezoelectric and acoustic component technology.
Service and Delivery Capabilities
For customers evaluating the 27mm irregular brass substrate piezoelectric disc or related diaphragm products, SWT offers one-on-one technical service solutions along with customized product development through OEM/ODM arrangements. Sample lead time is 3-7 days, while bulk production lead time runs 15-20 days. On-site service response within the Pearl River Delta region is available within 24 hours, supporting customers who require close technical collaboration during design optimization or reliability testing phases.
Why SWT’s Piezoelectric Disc Line Stands Out
Gd SWT Smart Tech Co., Ltd. describes its strategic vision as becoming a global supplier in specialized market segments and a "Lighthouse Factory" for specialized and innovative manufacturing, guided by a corporate mission "to give everything touch and perception by providing piezoelectric ceramic ultrasonic and electroacoustic solutions." For a component like the 27mm irregular brass substrate piezoelectric disc, this translates into a product built on an integrated ceramic production process, backed by industry standard-drafting authority, supported by IATF 16949:2016 and ISO certifications, and validated through multi-year partnerships with established international manufacturers.
Recognized as a National High-Tech Enterprise in China and as a Specialized and Innovative "Little Giant" Enterprise in Guangdong Province and Dongguan City, SWT’s intellectual property portfolio of 42 certified patents, including 9 invention patents, further underlines the technical foundation supporting its piezoelectric diaphragm and disc products. For engineers and procurement teams sourcing a 27mm piezoelectric disc with an irregular brass substrate, these combined factors — manufacturing integration, standards authority, certification coverage, and documented customer longevity — form the basis for evaluating the component’s suitability within acoustic, sensing, or signaling system designs.
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