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Three voltage variants — 3V (1.5–4.5V), 5V (3–7V), and 12V (8–16V) — sharing the same resonant frequency specification of 2700 ± 300 Hz
Integrated oscillator circuit — DC application generates fixed-tone output without external PWM or signal generator
≥85 dB sound pressure at 10 cm — specified minimum across all three variants at respective rated voltages
Black PBT housing; operating temperature -20 °C to +70 °C, storage temperature -30 °C to +80 °C
Through-hole mounting with polarized pin configuration
| Parameter | HNT-9650-03 | HNT-9650-05 | HNT-9650-12 |
| Rated Voltage | 3 V DC | 5 V DC | 12 V DC |
| Operating Voltage | 1.5 – 4.5 V DC | 3 – 7 V DC | 8 – 16 V DC |
| Sound Output at 10 cm | ≥ 85 dB | ≥ 85 dB | ≥ 85 dB |
| Operating Current | ≤ 30 mA | ≤ 30 mA | ≤ 30 mA |
| Resonant Frequency | 2700 ± 300 Hz | 2700 ± 300 Hz | 2700 ± 300 Hz |
| Operating Temperature | -20 °C ~ +70 °C | -20 °C ~ +70 °C | -20 °C ~ +70 °C |
| Storage Temperature | -30 °C ~ +80 °C | -30 °C ~ +80 °C | -30 °C ~ +80 °C |
| Dimensions (Dia × H) | 9.6 × 5.0 mm | 9.0 × 5.5 mm (per test report) | 9.6 × 5.0 mm |
| Weight | 0.78 g | 0.78 g | 0.78 g |
| Housing Material | Black PBT | Black PBT | Black PBT |
Integrated oscillator eliminates external drive — DC voltage application generates fixed 2700 ± 300 Hz tone without external PWM, microcontroller, or signal generator
Three voltage tiers — 3V, 5V, and 12V variants enable selection based on available system voltage rail
Polarized through-hole mounting — pin polarity marking indicates correct orientation
Black PBT housing for industrial assembly — compatible with wave soldering at 255 ± 15 °C and manual soldering at 360 ± 10 °C per specification
≤ 30 mA current draw at rated voltage — specified maximum operating current
2700 ± 300 Hz resonant frequency — specified center frequency with defined tolerance
| Parameter | Value | Test Conditions |
| Product Type | Electromagnetic Through-Hole Active Buzzer | — |
| Rated Voltage | 3 V DC | Nominal operating point |
| Operating Voltage | 1.5 – 4.5 V DC | Continuous range |
| Sound Output at 10 cm | ≥ 85 dB | At 3V, free field |
| Operating Current | ≤ 30 mA | At 3V |
| Resonant Frequency | 2700 ± 300 Hz | At rated voltage |
| Operating Temperature | -20 °C ~ +70 °C | Continuous |
| Storage Temperature | -30 °C ~ +80 °C | Non-operating |
| Dimensions (Dia × H) | 9.6 × 5.0 mm | Body excluding pins |
| Weight | 0.78 g | Typical |
| Housing Material | Black PBT | — |
| Soldering (Reflow) | 245 ± 15 °C, 3 s | 180 °C preheat 40–70 s; max 3 passes |
| Soldering (Wave) ★ | 255 ± 15 °C, 4–6 s | 2–3 passes recommended |
| Soldering (Manual) ★ | 360 ± 10 °C, 2–5 s | 2–3 passes recommended |
| Parameter | Value | Test Conditions |
| Product Type | Electromagnetic Through-Hole Active Buzzer | — |
| Rated Voltage | 5 V DC | Nominal operating point |
| Operating Voltage | 3 – 7 V DC | Continuous range |
| Sound Output at 10 cm | ≥ 85 dB | At 5V, free field |
| Operating Current | ≤ 30 mA | At 5V |
| Resonant Frequency | 2700 ± 300 Hz | At rated voltage |
| Operating Temperature | -20 °C ~ +70 °C | Continuous |
| Storage Temperature | -30 °C ~ +80 °C | Non-operating |
| Dimensions (Dia × H) | 9.0 × 5.5 mm | Per test report; verify for your application |
| Weight | 0.78 g | Typical |
| Housing Material | Black PBT | — |
| Soldering (Reflow) | 245 ± 15 °C, 3 s | 180 °C preheat 40–70 s; max 3 passes |
| Soldering (Wave) ★ | 255 ± 15 °C, 4–6 s | 2–3 passes recommended |
| Soldering (Manual) ★ | 360 ± 10 °C, 2–5 s | 2–3 passes recommended |
| Parameter | Value | Test Conditions |
| Product Type | Electromagnetic Through-Hole Active Buzzer | — |
| Rated Voltage | 12 V DC | Nominal operating point |
| Operating Voltage | 8 – 16 V DC | Continuous range |
| Sound Output at 10 cm | ≥ 85 dB | At 12V, free field |
| Operating Current | ≤ 30 mA | At 12V |
| Resonant Frequency | 2700 ± 300 Hz | At rated voltage |
| Operating Temperature | -20 °C ~ +70 °C | Continuous |
| Storage Temperature | -30 °C ~ +80 °C | Non-operating |
| Dimensions (Dia × H) | 9.6 × 5.0 mm | Body excluding pins |
| Weight | 0.78 g | Typical |
| Housing Material | Black PBT | — |
| Soldering (Reflow) | 245 ± 15 °C, 3 s | 180 °C preheat 40–70 s; max 3 passes |
| Soldering (Wave) ★ | 255 ± 15 °C, 4–6 s | 2–3 passes recommended |
| Soldering (Manual) ★ | 360 ± 10 °C, 2–5 s | 2–3 passes recommended |
Note: The following data is extracted from the test reports attached to the product specifications. These values illustrate typical distribution from sampled production batches and are not guaranteed specifications. The HNT-9650-05 test report references model HNB09A03; please verify current model designation with MEIDI.
| Variant | SPL Range (dB) | Current Range (mA) | Frequency Range (Hz) | Dia (mm) | H (mm) |
| HNT-9650-03 | 86.5 – 89.5 | 24.5 – 26.5 | 2690 – 2730 | 9.59 – 9.61 | 5.09 – 5.10 |
| HNT-9650-05 | 86.5 – 89.5 | 24.5 – 26.5 | 2677 – 2723 | 9.0 – 9.1 | 5.54 – 5.55 |
| HNT-9650-12 | 87.3 – 89.9 | 24.9 – 26.5 | 2677 – 2723 | 9.6 – 9.61 | 5.09 – 5.10 |
Guaranteed specifications are listed in the Technical Specifications tables above. Contact MEIDI for actual batch test data.
The following applications are identified based on parameter suitability analysis only. No automotive, medical, or safety certification is implied. Contact MEIDI for application-specific validation and compliance confirmation.
Industrial control panel alarm systems — fault indication and emergency alerts in PLC enclosures, motor drives, and process control systems where 12V, 5V, or 3.3V logic rails are available
Security and access control panels — intrusion detection, door-forced-open, and fire alarm audible signaling; 3V variant may suit battery-backed wireless panels, 12V variant matches standard security bus voltages
Power distribution and electrical equipment — breaker trip alarms, transformer overload warnings, and switchgear status indication
Factory automation machinery — CNC fault alerts, conveyor stop warnings, and robotic cell status signaling
Commercial appliance interfaces — end-of-cycle indication in industrial dishwashers, laundry equipment, and vending machines
Legacy equipment repair and refurbishment — potential replacement candidate for existing through-hole active buzzers; verify pin compatibility and dimensions against original part before use
| Design Consideration | 9650 Electromagnetic Active Buzzer Feature |
| Multiple system voltages in product line | Three variants (3V/5V/12V) share the same resonant frequency specification of 2700 ± 300 Hz |
| Simplified drive circuitry | Integrated oscillator eliminates external PWM generator, microcontroller timer, or dedicated buzzer driver IC |
| Through-hole mounting | Lead-through PCB mounting provides mechanical retention |
| Polarized pins | Pin polarity marking indicates correct orientation |
| Mixed-voltage product families | Same resonant frequency specification across 3V, 5V, and 12V variants |
| High-temperature assembly | PBT housing compatible with wave soldering at 255 °C and manual soldering at 360 °C per specification |
Request a sample to evaluate sound pressure, current consumption, and pin compatibility in your target application.
The 9650 Electromagnetic Active Buzzerspecifications define the following reliability tests:
High-temperature storage — 48 hours at +80 ± 2 °C, restore at room temperature for 2 hours before testing
Low-temperature storage — 48 hours at -30 ± 2 °C, restore at room temperature for 2 hours before testing
Temperature cycling — 5 cycles: -30 °C exposure 30 min, +80 °C exposure 30 min; restore at room temperature for 2 hours before testing
Drop test — horizontal position, free fall from 75 cm to 10 mm hardwood board, 3 drops; check appearance and measure electrical performance
Vibration test — 10–55 Hz, 1.0 mm amplitude, XYZ axes, 0.5 hours total; sweep time from 10 to 55 Hz and back under single amplitude of 1.0 mm is 1 minute
Humidity test — 48 hours at 50 ± 5 °C / 90–95% RH, restore at room temperature for 2 hours before testing
Solder heat resistance — immerse leads in molten solder at 250 ± 5 °C for 10 ± 0.5 seconds, body 2.0 mm from solder
Note: All test conditions are as specified in the MEIDI 9650 Electromagnetic Active Buzzer product specification dated 2023-11-07. Contact MEIDI for production test protocol details and actual batch test data.
1. How do I select between the HNT-9650-03, HNT-9650-05, and HNT-9650-12?
Selection depends on your available DC supply voltage. The HNT-9650-03 (1.5–4.5V) is suited for 3.3V logic systems and low-voltage microcontroller projects. The HNT-9650-05 (3–7V) matches 5V industrial logic and standard appliance control voltages. The HNT-9650-12 (8–16V) is designed for 12V industrial control buses and security system power supplies. All three variants share the same resonant frequency specification of 2700 ± 300 Hz and the same minimum sound pressure specification.
2. Can I use the HNT-9650-03 in a 5V system, or the HNT-9650-12 in a 24V system?
Not recommended. The HNT-9650-03 maximum operating voltage is 4.5V; applying 5V risks exceeding the specified operating range. The HNT-9650-12 maximum operating voltage is 16V; applying 24V risks coil damage. For systems with voltages outside the specified operating ranges, use a voltage regulator or series resistor to bring the applied voltage within the variant’s rated limits. Contact MEIDI for specific circuit recommendations.
3. What is the difference between active and passive buzzers, and why choose active?
An active buzzer contains an integrated oscillator circuit that generates sound when DC voltage is applied. A passive buzzer requires an external AC signal (typically square wave or PWM) at the resonant frequency to produce sound. The MEIDI HNT-9650 Series active design eliminates the need for external drive circuitry, PWM generation, or microcontroller involvement.
4. Is the HNT-9650 Series pin-compatible with other 9 mm or 12 mm through-hole buzzers?
The HNT-9650-03 and HNT-9650-12 feature a 9.6 mm diameter body; the HNT-9650-05 features a 9.0 mm diameter body. For direct replacement of existing through-hole buzzers, verify pin diameter, pitch, and polarity against the original PCB layout. Contact MEIDI for cross-reference verification against specific legacy part numbers.
5. What soldering process is recommended for the HNT-9650 Series?
The product specification identifies wave soldering (255 ± 15 °C, 4–6 seconds) and manual soldering (360 ± 10 °C, 2–5 seconds) as the recommended processes, indicated with ★ symbols. Reflow soldering is permitted (245 ± 15 °C peak, 3 seconds, 180 °C preheat 40–70 seconds) with a maximum of 3 passes. The PBT housing material is selected for compatibility with these temperature profiles. For high-volume automated assembly, wave soldering is the recommended method. For repair and prototype work, manual soldering is acceptable within the specified temperature and time limits.
1.Do not apply voltage beyond the specified operating voltage range.
2.This product is of open design and does not meet waterproof or glue-leakage requirements.
3.Prolonged use in an environment with corrosive gas may corrode the buzzer components and prevent proper operation.
4.The sound pressure performance of the buzzer will change with the applied voltage or current; ensure the operating voltage or current meets the specification requirements.
5.Avoid placing a baffle in front of the sound hole or covering it, as this may lead to unstable operation.
6.The buzzer should be stored in proper packaging to avoid moisture, rust, and oxidation of the pin terminals.
For cross-reference verification against legacy through-hole buzzers, series datasheets, sample evaluation of voltage variants, or custom lead configurations, contact MEIDI Applications Engineering.
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