External square wave drive at 2730Hz for consistent acoustic output
16Ω coil impedance compatible with standard transistor and MCU driver circuits
12mm industry-standard footprint for established through-hole PCB layouts
Min. 85dB sound pressure at 10cm under rated drive conditions
-20℃ to +70℃ operating temperature range for indoor industrial environments
Black PPO housing compatible with wave soldering and manual assembly
The MEIDI 12mm 2730Hz Through-Hole Electromagnetic Passive Buzzer is an electromagnetic passive buzzer designed for through-hole mounting in electronic systems requiring external drive signal for sound generation. At 12mm body diameter, this buzzer integrates into standard PCB layouts widely used in industrial control panels, security alarm systems, consumer appliances, and diagnostic equipment.
The 2730Hz resonant frequency accepts external square wave drive signals, enabling consistent acoustic feedback when driven at or near the rated frequency. With a rated voltage of 3Vo-p and operating range of 2--4Vo-p, the HN-1260B provides flexibility in driver circuit design across 3V and 5V logic systems.
The 16Ω coil resistance is selected to match common open-collector transistor and microcontroller GPIO driver configurations, minimizing the need for specialized drive circuitry. The black PPO housing provides structural stability for through-hole wave soldering and manual rework processes.
External drive architecture --- accepts square wave signals at 2730Hz for programmable tone generation; requires AC excitation, DC voltage alone will not produce sound
Standard through-hole form factor --- 12mm diameter with industry-standard pin pitch accommodates existing PCB layouts and front-panel cutouts
16Ω coil impedance --- matches common NPN/PNP transistor driver circuits and 3.3V/5V microcontroller GPIO outputs with adequate current capability
Stable acoustic output --- Min. 85dB at 10cm when driven at 3Vo-p, 2731Hz, 50% duty cycle square wave
PPO housing material --- black housing tolerates wave soldering and manual soldering rework without deformation
RoHS environmental compliance --- meets restricted substance requirements for global market distribution
| Parameter | Value | Test Conditions |
| Product Type | Electromagnetic Passive Buzzer | --- |
| Rated Voltage | 3Vo-p | Resonant frequency reference |
| Operating Voltage | 2--4Vo-p | Drive signal peak |
| Sound Pressure Level | Min. 85dB | At 3Vo-p, 2731Hz, 50% duty, 10cm |
| Resonant Frequency | 2730Hz | At rated voltage |
| Coil Resistance | 16 ± 4Ω | DC, 25℃ |
| Rated Current | Max. 60mA | At 3Vo-p, 2731Hz, 50% duty |
| Operating Temperature | -20℃ ~ +70℃ | Continuous |
| Storage Temperature | -30℃ ~ +80℃ | Non-operating |
| External Size | 12mm (diameter) | Body excluding pins |
| Net Weight | Approx. 1.0g | Typical |
| Housing Material | Black PPO | --- |
| Environmental Protection Regulation | RoHS | --- |
Industrial control panel alarm modules requiring standard-frequency acoustic alerts
Security and intrusion detection systems with existing 12mm buzzer mounting holes
Consumer appliance control boards utilizing through-hole assembly processes
Diagnostic and test equipment needing audible status indication
PLC and automation systems with 5V or 3.3V logic-level drive outputs
Uninterruptible power supply units for low-battery and fault condition warnings
| Design Requirement | HN-1260B Advantage |
| Established through-hole PCB layouts | 12mm diameter matches industry-standard footprint and front-panel cutouts |
| Standard driver circuit compatibility | 16Ω coil impedance works with common transistor and MCU GPIO configurations |
| Consistent alarm tone frequency | 2730Hz resonant frequency ensures uniform acoustic character across production batches |
| Assembly process flexibility | Black PPO housing compatible with wave soldering and manual rework |
| Environmental compliance | RoHS approval for global distribution and restricted substance regulations |
MEIDI manufactures HN-1260B with quality control at each production stage from product design, purchasing, and testing. Production facilities maintain ISO 9001, ISO 14001, and QS 9000 certifications. All products carry CE mark and RoHS approvals.
After any of the following tests, the product shall meet the acceptance criteria: no defects or degradation in appearance and electrical properties (except SPL); SPL shall not be lower than 10dB below the minimum SPL specified in the datasheet.
| Test Item | Test Conditions |
| Life Test | 25±10℃, rated voltage, 1/2 duty resonant frequency square wave, 96 hours |
| High Temperature Test | +80℃ storage for 96 hours, recover at room temperature for 3 hours before testing |
| Low Temperature Test | -40℃ storage for 96 hours, recover at room temperature for 3 hours before testing |
| Humidity Test | +40±3℃, 90%--95% RH, 48 hours, recover at room temperature for 6 hours before testing |
| Thermal Shock Test | 70℃ 2 hours → -20℃ 2 hours (1 cycle), interval 1 hour between cycles, total 10 cycles |
| Drop Test | Standard packaging (3 edges, 6 faces of box), drop from 1.2m height onto thick wood board or 5cm hard wood board |
| Vibration Test | 1000 cycles/min, amplitude 1.5mm, 1 hour per direction, 3 degrees of freedom |
Caution: Avoid foreign materials entering the product, including magnetic materials, water-soluble materials, and corrosive gases, as these will affect the electrical performance of the product.
1. Does this buzzer require an external drive signal, or can it be driven with DC voltage?
As a passive electromagnetic buzzer, HN-1260B requires an external AC signal --- typically a square wave at or near 2730Hz --- to generate audible output. DC voltage alone will not produce sound and may damage the coil through continuous current flow.
2. What driving frequency is recommended for maximum sound pressure output?
Maximum SPL occurs at the resonant frequency of 2730Hz. SPL decreases significantly when driven off-resonance. For consistent Min. 85dB output, drive at 2731Hz with 50% duty cycle square wave at 3Vo-p.
3. What driver circuit is suitable for the 16Ω coil impedance?
Standard open-collector NPN/PNP transistor configurations with pull-up resistors are compatible. For microcontroller GPIO direct drive, verify the port can source or sink ≥60mA. A flyback diode is recommended when driving with inductive loads or relay circuits.
4. What is the recommended soldering method for this through-hole buzzer?
HN-1260B is compatible with standard through-hole wave soldering processes. For manual soldering, contact MEIDI for recommended temperature and duration specifications to avoid housing deformation.
5. Are custom resonant frequencies or coil resistances available?
Contact MEIDI for technical inquiries regarding custom configurations.
For technical datasheets, drive circuit application notes, or OEM configuration discussion, contact MEIDI applications engineering.
Address
No.6, Wenlin Road, Chenbao Town, Xinghua City, Jiangsu Province, China
Tel
