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Dedicated to global electroacoustic technology.
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The BM7525S SMD Electro-Magnetic Buzzer is a precision-engineered acoustic component designed to deliver clear, penetrating sound signals directly from PCBA boards. Utilizing a tightly wound electromagnetic coil and a responsive metallic diaphragm, this device converts electrical currents into mechanical vibrations, producing sharp and distinct auditory tones that easily cut through ambient background noise. Designed with a highly compact 7525 physical footprint, it offers engineers a tactile, space-saving solution without compromising on acoustic output. These components are recognized for their stable performance, low power draw, and consistent frequency response across extended operational periods. By facilitating straightforward surface-mount assembly and ensuring reliable durability, the BM7525S series serves as a critical auditory indicator for consumer electronics, home appliances, security systems, and industrial control equipment, providing unmistakable alerts, status reminders, and operational feedback.
The BM7525S electromagnetic buzzer delivers a consistent, crisp sound output driven by an optimized coil-and-diaphragm architecture. Its operating frequency remains tightly controlled within a ±2% tolerance, guaranteeing that audio signals remain uniform across thousands of production units. Every batch undergoes rigorous sound pressure level (SPL) consistency verification and tens of thousands of life cycle tests before dispatch. With an operational lifespan exceeding 50,000 hours under standard conditions, this component ensures long-term acoustic fidelity. The structural design actively suppresses mechanical distortion, ensuring dependable alert generation in critical applications.
Engineered to maximize energy efficiency, this acoustic component functions optimally at low rated voltages ranging from 1.5V to 5V, while maintaining an exceptionally low current consumption profile of just 10–30mA. This efficient power utilization makes it an excellent choice for battery-operated devices, portable electronics, and energy-sensitive circuits. The internal magnetic structure maximizes the conversion of electrical input into acoustic energy, delivering a strong, audible output while minimizing the drain on the host system's power reserves.
Featuring a miniaturized 7525 standard surface-mount package, this buzzer is specifically developed for modern, high-density printed circuit boards. It perfectly accommodates automated pick-and-place manufacturing processes, streamlining assembly lines and reducing production cycle times. The component is engineered to withstand lead-free reflow soldering temperatures up to 260°C, ensuring a secure and flawless integration onto the PCB without thermal degradation. Its lightweight profile allows hardware designers to allocate board space more efficiently.
The buzzer supports distinct frequency ranges, typically between 2kHz and 4kHz, generating sound pressure levels up to 85–95dB at a 10cm distance. This ensures the alert is clearly audible even in environments with competing ambient noise. Furthermore, the BM7525S is built to endure demanding conditions, featuring a broad operating temperature range from -20°C to +70°C. Having passed stringent anti-vibration, moisture resistance, and thermal cycling tests, it maintains its acoustic integrity across complex industrial, medical, and commercial environments.
Parameter | Specification Value |
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Operating Voltage | 1.5V – 5V DC |
Rated Current | 10 – 30mA |
Sound Pressure Level (SPL) | 85 – 95dB (at 10cm) |
Resonant Frequency | 2kHz – 4kHz (Stable within ±2%) |
Operating Temperature | -20°C to +70°C |
Reflow Soldering Tolerance | Up to 260°C (Lead-free compatible) |
Expected Lifespan | > 50,000 hours |
Package Type | SMD / SMT (7525 footprint, compatible with 9mm/12mm layouts) |
In the realm of personal electronics such as smartphones, tablets, wearable fitness trackers, and handheld gadgets, internal space is highly restricted. The BM7525S provides immediate audio feedback for user interactions, incoming notifications, and critical system alerts. Its minimal footprint and low power draw prevent unnecessary battery drain, while its sharp acoustic profile ensures the user receives a clear, recognizable auditory signal during daily operation.
Modern household appliances require dependable alert mechanisms to communicate with users. Integrated into control boards of microwave ovens, washing machines, induction cookers, and HVAC units, these buzzers signal the completion of cycles, register button presses, or issue error warnings. Their ability to function reliably despite the fluctuating temperatures and ambient humidity often found in kitchens and laundry rooms makes them an essential interface component.
For security infrastructure—including alarm control panels, smoke detectors, and electronic access control systems—a penetrating warning sound is non-negotiable. The high sound pressure output (up to 95dB) guarantees that alerts concerning unauthorized entry, potential fire hazards, or system malfunctions are broadcasted effectively. The rapid response time of the electromagnetic diaphragm ensures immediate auditory warnings in safety-critical situations.
Precision medical equipment, such as patient monitoring devices, diagnostic instruments, and portable healthcare electronics, relies on accurate auditory cues to notify healthcare professionals of status changes. The consistent frequency and strict quality control of these buzzers ensure that medical personnel hear the exact intended tone every time, preventing confusion. The low current requirement is particularly beneficial for battery-operated portable medical monitors.
Selecting the correct acoustic component requires a careful evaluation of your specific circuit architecture and the final application environment. Hardware engineers and procurement teams should evaluate the following criteria to ensure optimal integration and performance:
Voltage and Current Matching: Verify that the buzzer's rated parameters (e.g., 1.5V–5V, 10–30mA) align with your power supply capabilities to prevent under-driving the sound or overloading the circuit.
Acoustic Requirements: Assess the necessary Sound Pressure Level (SPL) for your environment. An output of 85–95dB at 10cm is typically sufficient for room-level alerts, while the 2–4kHz frequency range offers the best audibility for the human ear.
Footprint and Assembly: Confirm the physical dimensions. The 7525 package size must match your PCB layout pads, and the component must be rated for your specific assembly method, such as 260°C reflow soldering.
Environmental Tolerances: If the end product will be used outdoors or in industrial settings, ensure the buzzer is rated for extended temperature ranges (like -20°C to +70°C) and can withstand expected moisture or vibration levels.
To support smooth manufacturing scaling and strict market entry requirements, our supply chain and technical teams provide comprehensive backing for every order. The BM7525S series is fully compliant with international environmental and safety standards, including RoHS and REACH, and is manufactured under a strict ISO-certified quality management system. This ensures unhindered access to strict global markets, including medical and consumer sectors.
We understand the dynamic needs of modern production lines. Therefore, we offer flexible Minimum Order Quantity (MOQ) policies alongside tiered pricing structures to optimize your procurement budget. With standard inventory maintained to support rapid 7-14 day delivery turnarounds, we help mitigate your inventory holding costs and prevent line-down situations. Furthermore, our engineering team provides complete technical documentation, factory inspection reports, and dedicated acoustic cavity design guidance, all backed by a solid 12 to 24-month warranty to secure your product development lifecycle.
