9mm 5.5mm 2.7KHz SMD Piezo Buzzer: SWT's Reliable Choice

Introduction: A Compact Sound Solution Built on 25 Years of Piezoelectric Expertise

The 9mm 5.5mm 2.7KHz SMD Piezo Buzzer represents a class of compact, surface-mount acoustic components designed to meet the growing demand for space-saving, high-performance sound signaling devices. As part of Gd SWT Smart Tech Co., Ltd.'s (Dongguan Sweetsound) broader SMD/SMT Buzzer product line, this type of component is engineered for applications where footprint, mounting efficiency, and consistent frequency output are critical decision factors for design engineers.

Core Features and Technical Highlights

SWT's SMD/SMT Buzzer series is defined by several core characteristics that directly address common engineering requirements:

• Small Footprint: The compact 9mm x 5.5mm form factor allows for dense PCB layouts, making it suitable for space-constrained electronic assemblies.
• Reflow Soldering Compatibility: The SMD/SMT format is built for automated surface-mount assembly lines, reducing manual labor and improving production consistency.
• High Sound Pressure Level (SPL): The buzzer delivers strong audible output relative to its size, supporting clear signaling in various operating environments.
• Stable Frequency Output: At a rated 2.7KHz, the device is positioned within the frequency range typical of SWT's piezoelectric diaphragm and buzzer components, which are known for stable, low-power acoustic performance.

Within the broader SMD/SMT Buzzer family, comparable models such as the PSE1230+4003SA (3V) and MS7525+2705SA (5V) illustrate the range of voltage and dimensional configurations SWT offers, reflecting the company's capacity to customize buzzer specifications according to application-specific voltage, size, and frequency requirements.

Additionally, SWT provides both Active and Passive Buzzer configurations. Active buzzers integrate an internal drive circuit for simplified system integration, while passive buzzers rely on external drive signals, offering greater frequency flexibility for applications such as automotive seatbelt reminders, smoke alarms, and household appliances.

Manufacturing Excellence Behind Every Unit

SWT's ability to deliver consistent, high-quality SMD piezo buzzers stems from its integrated supply chain, which maintains comprehensive control over the front, middle, and rear processes of piezoelectric ceramic production. This includes tape casting (flow casting) for thin sheet formation, dry pressing for thick sheet formation, and complete downstream processing covering squeezing, laminating, sintering, polarizing, and automated testing.

This vertically integrated approach supports an annual shipping capacity of approximately 250 million pieces for piezoelectric ceramic elements, positioning SWT to handle both prototype development and high-volume production orders. The company's production infrastructure spans its Dongguan Headquarters (24,000 square meters) and its Guizhou Branch in Bijie City (4,000 square meters), supported by over 400 sets of instruments and equipment, including large-scale automatic tunnel furnaces and automated assembly machines.

Quality Assurance and Certifications

Reliability is a central concern for engineers selecting acoustic components, particularly for automotive and safety-related applications. SWT addresses this through a comprehensive certification framework, including:

• IATF 16949:2016 for Automotive Quality Management, obtained in 2023.
• ISO 9001:2015 Quality Management System, first certified in 2003.
• ISO 14001:2015 Environmental Management System, also certified in 2003.
• RoHS and REACH Compliance across all products.

These certifications provide assurance that SMD piezo buzzer products, including compact formats like the 9mm x 5.5mm variant, are manufactured under rigorous quality and environmental standards suitable for automotive-grade and consumer-grade applications alike.

Industry Standard-Setting Authority

A distinguishing aspect of SWT's market position is its role 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, and in 2012, the buzzer industry standards it drafted received official approval and publication. SWT also served as the drafting unit for standards covering "Piezoelectric Sounders and Piezoelectric Buzzers" and "Electromagnetic Sounders and Electromagnetic Buzzers," recognized officially by the Quality and Technical Supervision Bureau of Guangdong Province.

Proven Track Record with Global Clients

SWT's buzzer technology has been validated through long-term partnerships with recognized global manufacturers. In the automotive and consumer electronics sector, SWT has maintained a stable supply relationship with Panasonic and Sanyo for over 18 years (since 2005 and 2007, respectively), delivering high-stability automotive-grade buzzers with zero-defect quality performance supporting global automotive safety standards.

In consumer electronics, SWT has partnered with VTech, a manufacturer of corded and cordless telephones and electronic learning products, since 2004, enabling high-quality audio feedback in millions of consumer devices annually. In the home appliance sector, Whirlpool has relied on SWT's customized acoustic solutions since 2010, enhancing user interface sounds for international markets.

Client feedback consistently highlights SWT's "professional problem-solving," "excellent quality," and "strong service awareness" as key reasons behind these decades-long partnerships.

Application Scenarios

The versatility of SWT's SMD/SMT buzzer series, including compact models such as the 9mm x 5.5mm 2.7KHz configuration, supports a range of industry applications:

• Automotive Electronics: High-reliability buzzers for safety systems and sentinel modes.
• Smart Home & Appliances: Feedback sounders for white goods and USB humidifiers.
• Security & Safety: Smoke alarms and industrial sirens, leveraging active and passive buzzer configurations.
• Consumer Electronics: Audio feedback components for learning devices and household electronics.

Why Choose SWT's SMD Piezo Buzzer Series

For engineers and procurement teams evaluating compact acoustic components, SWT's SMD/SMT Buzzer series offers a combination of technical capability and manufacturing scale. The company's one-on-one technical service solutions and customized product development (OEM/ODM) allow for tailored specifications, while sample lead times of 3-7 days and bulk production lead times of 15-20 days support both rapid prototyping and volume manufacturing needs. On-site service within the Pearl River Delta region is available with 24-hour response.

Backed by its status as a National High-Tech Enterprise and a Specialized and Innovative "Little Giant" Enterprise recognized by Guangdong Province and Dongguan City, SWT continues to apply its 25 years of cumulative piezoelectric manufacturing experience to components like the 9mm 5.5mm 2.7KHz SMD Piezo Buzzer, supporting applications that demand consistent acoustic performance in a compact, surface-mountable form factor.

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