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Dedicated to global electroacoustic technology.
The BM5020S SMD Electro-Magnetic Buzzer represents a highly efficient surface-mount acoustic component specifically engineered to generate precise sound signals across modern PCBA boards. Operating through a sophisticated electromagnetic coil and diaphragm structure, an applied electric current induces a magnetic field that drives rapid vibration, producing clear, crisp, and highly audible tones. Built with premium industrial-grade materials, the buzzer features a high-temperature-resistant Liquid Crystal Polymer (LCP) housing paired with meticulously engineered tin-plated brass terminals. This robust material and structure combination ensures absolute structural stability and excellent electrical conductivity, particularly during demanding lead-free reflow soldering processes.
When handled, the component presents a smooth, precisely molded black exterior with perfectly aligned terminals, reflecting its advanced manufacturing process. Hardware engineers rely on these buzzers for their exceptionally stable performance, minimal power draw, and consistent acoustic output. Offering direct integration into automated SMT assembly lines, stable frequency response, and proven physical durability, this acoustic solution is indispensable for delivering reliable alerts, status reminders, and operational indications in complex electronic ecosystems.
Delivering consistent and clear sound output, the BM5020S relies on a precisely engineered coil and diaphragm architecture. The operating frequency remains exceptionally stable within a tight ±2% tolerance, guaranteeing reliable audio signaling even in critical operational environments. To ensure long-term dependability, the component undergoes rigorous reliability and environmental testing, including prolonged exposure to high and low temperatures, constant temperature and humidity chambers, thermal shock cycles, and severe drop and vibration assessments. Consequently, it boasts an impressive operational lifespan exceeding 50,000 hours under normal conditions, resisting sound distortion and maintaining acoustic integrity across challenging industrial and consumer landscapes.
Designed specifically for energy efficiency, this SMD electromagnetic buzzer operates flawlessly at low rated voltages ranging from 1.5V to 5V, while maintaining an ultra-low current consumption of just 10–30mA. This highly efficient driving mechanism makes it an exceptional choice for battery-powered instruments and portable electronic devices where power preservation is critical. The optimized electromagnetic structure guarantees a remarkably strong sound output without draining system resources, directly contributing to extended battery life and reduced overall system power consumption for your end products.
Featuring a miniaturized surface-mount profile, these buzzers are perfectly optimized for high-speed, automated pick-and-place assembly processes. Common footprint sizes such as 9mm, 12mm, and even smaller profiles grant hardware designers immense flexibility in dense PCB layout planning. To further reduce assembly defect rates and enhance manufacturing efficiency, we provide comprehensive SMT assembly and soldering guidelines, including standard reflow soldering temperature profiles and optimized pad design recommendations. Its lightweight, compact form factor supports high-density circuit integration, driving down assembly costs while maximizing production throughput.
Recognizing that different applications demand unique auditory feedback, these buzzers support customizable frequency ranges, most commonly between 2kHz and 4kHz, alongside powerful sound pressure levels reaching up to 85–95dB at a 10cm distance. To assist hardware engineers in achieving the optimal acoustic output, we supply recommended driving circuit diagrams and detailed frequency response curves. This enables rapid frequency matching and ensures the highest quality sound pressure output, allowing the component to be perfectly tailored for specific acoustic and structural requirements in alarms, medical monitors, and smart home networks.
Understanding the exact technical specifications is crucial for proper integration into your circuit designs. The BM5020S is engineered to deliver precise acoustic performance while maintaining strict electrical tolerances. Below is a comprehensive overview of the core operational parameters that define this electromagnetic buzzer's capabilities, ensuring hardware engineers have the exact data needed for optimal component matching.
Parameter | Specification |
|---|---|
Rated Voltage Range | 1.5V – 5V |
Current Consumption | 10 – 30mA |
Frequency Range | 2kHz – 4kHz (±2% stability) |
Sound Pressure Level (SPL) | 85 – 95dB at 10cm |
Operational Lifespan | > 50,000 hours |
Housing Material | High-Temperature LCP |
Widely integrated into modern consumer electronics—including smartphones, tablets, wearable health trackers, and handheld gaming consoles—these SMD electromagnetic buzzers deliver immediate audio feedback for user notifications, tactile button presses, daily alarms, and critical system alerts. Their ultra-compact size and minimal power consumption make them the perfect acoustic solution for space-constrained designs. Furthermore, the stable sound output guarantees a clear, consistent, and pleasant user experience, enhancing the overall perceived value of everyday electronic gadgets.
Within the demanding environments of household appliances such as microwave ovens, smart washing machines, induction cookers, and climate control air conditioners, these buzzers function as essential reminder and alert mechanisms. They effectively notify users of completed operation cycles, provide immediate error warnings, and signal operational status changes. Their exceptional durability and proven ability to operate reliably amidst fluctuating temperature and humidity conditions ensure they deliver consistent acoustic performance over the long lifespan expected of major household appliances.
In the realm of safety and security, reliability is non-negotiable. These buzzers play a foundational role in security devices like central alarm control panels, residential smoke detectors, and commercial access control systems by generating unmistakable warning sounds. They are instrumental in alerting users to potential environmental dangers, unauthorized facility access, or internal system malfunctions. The high sound pressure output combined with an instantaneous response time ensures that alerts are both timely and highly effective in safety-critical applications.
Precision medical equipment, including continuous patient monitoring devices, advanced diagnostic instruments, and portable healthcare therapeutics, relies heavily on accurate auditory cues. These electromagnetic buzzers provide clear, unambiguous sounds for operational status updates, critical patient alerts, and routine medication reminders. Their low power requirements ensure they do not interfere with sensitive medical electronics, while their stable acoustic performance makes them exceptionally suited for high-stakes healthcare environments where absolute reliability and consistency are paramount.
When selecting the ideal SMD electro-magnetic buzzer for your specific project, engineers must evaluate several critical factors to ensure optimal performance and perfect circuit compatibility. First, carefully consider the rated voltage and current consumption to verify alignment with your existing power supply design. It is essential to check the sound pressure level—aiming for the standard 85–95dB at 10cm—to guarantee the audio output meets your application’s specific audibility requirements in its intended environment. Additionally, pay close attention to the frequency range, typically spanning 2–4kHz, to achieve optimal sound clarity and human ear sensitivity. Evaluate the physical size and SMT package dimensions to ensure they perfectly match your proposed PCB layout and automated assembly constraints. Furthermore, thoroughly review the operating temperature range and reliability standards to ensure long-term, fail-safe performance. Selecting a manufacturing partner with deep customization capabilities and robust engineering support can significantly improve the final product fit and elevate the end-user experience.
To meet the rigorous demands of high-volume automated manufacturing and global supply chains, our SMD electromagnetic buzzers are packaged with meticulous attention to detail and environmental safety.
Standardized Tape & Reel Packaging: Components are securely enclosed in standard Tape & Reel formats, perfectly adapted for rapid, automated pick-and-place production lines.
Moisture-Proof Vacuum Sealing: Each reel is protected within a moisture-proof vacuum-sealed bag, preventing oxidation of the tin-plated brass terminals and ensuring structural integrity during extended transit and storage.
Detailed Carton Specifications: We provide precise inner and outer carton dimensions and weight specifications, facilitating accurate inventory management and secure logistics handling.
Global Environmental Compliance: The BM5020S strictly adheres to international environmental and safety standards, including full RoHS compliance. This guarantees an eco-friendly manufacturing footprint and significantly accelerates the global market access and regulatory approval process for your final terminal equipment.
