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The BM1290 Electromagnetic Buzzer is a precision-engineered electro-acoustic component designed to deliver reliable, penetrating sound through the precise interaction of a magnetic field and a highly responsive vibrating diaphragm. When an electrical current flows through the internal copper coil, it generates a concentrated magnetic force that drives the diaphragm, producing a crisp, audible tone that easily cuts through ambient noise. Housed in a durable, flame-retardant casing, this buzzer offers a tactile sense of solid construction while maintaining a minimal footprint on your circuit board.
Known for its stable sound output, uncomplicated driving circuits, and dependable performance even at exceptionally low voltages, it provides an optimal acoustic solution for electronic engineers and product designers. With its moderate power consumption and distinctly clear tone quality, the BM1290 serves as an essential component for alarms, household appliances, industrial machinery, and various electronic devices requiring immediate notifications, critical warnings, and clear status indications.
The coil-driven diaphragm structure ensures a highly stable sound profile across varying conditions. The operating frequency is strictly controlled within a ±2–3% tolerance, guaranteeing consistent, piercing tones that do not degrade over time. Emitting a sound pressure level of 85–95dB at 10cm, it ensures that audio alerts are immediately recognized. To guarantee this acoustic consistency, each unit undergoes rigorous high and low-temperature cycling, continuous sounding lifespan tests, and drop/shock resistance evaluations, resulting in an exceptionally low defect rate during mass production.
Driven directly by DC voltage ranging from 1.5V to 12V, this component eliminates the need for complex external oscillation circuits. Its compact structural design and standard pin pitch layout are perfectly tailored for high-density PCB configurations, effectively saving valuable board space. This straightforward integration significantly reduces design complexity and accelerates assembly, making it highly efficient for large-scale manufacturing environments.
Striking an optimal balance between energy efficiency and acoustic performance, the buzzer consumes merely 20–50mA of current while generating a strong, attention-grabbing sound. This efficiency makes it an ideal choice for battery-operated portable devices as well as fixed installations where clear auditory alerts are mandatory without draining power reserves. The consistent efficiency ensures dependable performance across various operating conditions.
Engineered for versatility, the buzzer can be tailored to meet specific project demands. Customization is available for frequency ranges (typically 2–4kHz), sound pressure levels, physical dimensions, and mounting configurations (SMD or through-hole). This adaptability empowers design engineers to fine-tune the acoustic performance for specialized applications, ensuring the component precisely matches the end-product requirements.
Constructed with high-temperature-resistant, flame-retardant materials and featuring a moisture-proof sealing process, the buzzer maintains stable acoustic performance even in harsh environments with severe temperature and humidity fluctuations. Furthermore, it is fully compatible with standard wave soldering and reflow soldering processes. Its superior heat resistance meets the rigorous demands of automated SMT production lines, ensuring fast and reliable assembly.
Understanding the exact specifications of the BM1290 is crucial for proper circuit integration. The following parameters highlight the component's ability to deliver a loud, clear signal while maintaining energy efficiency. The strict frequency tolerance ensures that multiple units used in the same facility will produce identical tones, preventing auditory confusion.
Parameter | Specification Value |
|---|---|
Operating Voltage Range | 1.5V – 12V DC |
Rated Current Consumption | 20mA – 50mA |
Sound Pressure Level (SPL) | 85dB – 95dB (at 10cm) |
Operating Frequency | 2kHz – 4kHz |
Frequency Tolerance | ±2% – 3% |
Mounting Type | SMD or Through-hole |
Integrated into fire alarms, intrusion detectors, and safety panels, the buzzer emits a continuous, unmistakable sound that alerts occupants to emergencies. Its penetrating 85–95dB output ensures the warning cuts through background noise in large rooms and semi-industrial spaces, providing effective notification when it matters most.
Embedded in microwaves, washing machines, air conditioners, and induction cookers, it provides pleasant yet distinct operation reminders. Whether signaling the end of a cooking cycle or alerting the user to an open door, the clear tone enhances daily user interaction and improves overall appliance usability.
Deployed in factory control panels, automated assembly lines, and heavy machinery, the buzzer acts as a critical auditory indicator for operational status and fault warnings. Its moisture-proof and temperature-resistant construction ensures continuous reliability and durability in demanding factory environments.
Utilized in timers, electronic toys, telephones, and communication devices, it delivers responsive audio cues for button presses and system notifications. The compact footprint allows it to fit snugly into small, handheld gadgets where internal space is at a premium, making it a highly cost-effective choice.
Installed in door entry panels, electronic locks, and security keypads, it generates immediate confirmation beeps and access-denied warnings. This instant auditory feedback assures users that their input has been registered, enhancing the overall security experience and safety awareness.
When implementing the BM1290 electromagnetic buzzer into your hardware design, carefully match the rated voltage (1.5V–12V) and current (20–50mA) to your power supply to ensure longevity and prevent coil burnout. Evaluate the target environment to confirm the 85–95dB sound pressure level is sufficient for the intended ambient noise. For the layout phase, select the appropriate mounting type (SMD or through-hole) that aligns with your PCB density and assembly capabilities. Also, review operating temperature ranges and frequency stability (commonly 2–4kHz) to guarantee consistent tone output.
To support global distribution and automated manufacturing, this component is fully compliant with international environmental and electronic safety directives, including RoHS and REACH, ensuring barrier-free export for your finished devices. For the production line, we offer flexible packaging and delivery solutions, including standard anti-static Tape & Reel or tray packaging options. These formats seamlessly interface with automated pick-and-place machines, guaranteeing high-speed, large-scale production and rapid project turnaround.
