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The 9.6*9.6*5mm SMD Magnetic Active Buzzer is a self-driven electromagnetic active buzzer engineered for applications where immediate acoustic feedback is required without external oscillator circuitry. At 9.6 × 9.6 × 5.0 mm, this 5V SMD electromagnetic active buzzer occupies a mid-sized footprint that balances acoustic output with PCB real estate constraints, making it suitable for industrial control panels, medical instrumentation, and commercial appliance interfaces where board space is at a premium but audible alert integrity cannot be compromised.
Unlike passive buzzers that demand PWM signal generation and driver components, the MLT-9650Y-5V integrates a factory-tuned oscillator circuit that produces a stable 3000 Hz tone at ≥85 dB when a DC voltage between 4 V and 7 V is applied. This architecture eliminates the need for microcontroller timer resources, transistor driver stages, and inductive filtering components, reducing both BOM complexity and design validation cycles.The ≤30 mA current draw at 5 V is compatible with standard logic-level outputs and relay contacts, enabling direct drive from PLC digital outputs, MCU GPIO pins with adequate current sourcing capability, or simple switching circuits.
The black LCP housing provides dimensional stability through standard lead-free reflow profiles with a peak temperature of 255 ± 5 °C, supporting automated SMT assembly lines without specialized handling protocols. With an operating temperature range of -30 °C to +70 °C and storage tolerance extending to -40 °C, the MLT-9650Y-5V accommodates deployment in uncontrolled environments including outdoor telecommunications enclosures, refrigerated logistics equipment, and automotive interior subsystems where thermal excursions exceed consumer-grade limits.
| Parameter | Value |
| Rated Voltage | 5 V (o-p) |
| Operating Voltage Range | 4 – 7 V |
| Sound Pressure Level | ≥ 85 dB |
| Resonant Frequency | 3000 ± 300 Hz |
| Operating Current | ≤ 30 mA |
| Operating Temperature | -30 ℃ ~ +70 ℃ |
| Storage Temperature | -40 ℃ ~ +85 ℃ |
| Dimensions | 9.6 × 9.6 × 5.0 mm |
| Weight | 1.5 g |
| Mounting Type | SMD (Surface Mount Device) |
Zero external oscillator components — apply DC voltage directly; no PWM timer allocation, transistor buffer, or flyback diode required, preserving microcontroller resources for primary application logic
Wide voltage headroom — 4–7 V operating range accommodates 5 V nominal rails with ±20% regulator tolerance, battery drain curves, and industrial 24 V systems stepped down through simple resistive or switching regulators
Consistent acoustic signature — internal oscillator maintains 3000 Hz center frequency with ±10% tolerance across the full voltage and temperature envelope, eliminating the frequency drift common to externally driven passive transducers
Mid-size SMD footprint --- 9.6 mm square package provides adequate diaphragm excursion area for reliable ≥85 dB output without requiring through-hole assembly
Reflow and wave soldering compatible — black LCP housing rated for 255 °C peak reflow temperature and 360 °C manual soldering, supporting mixed assembly environments from prototype hand-soldering to high-volume automated lines
| Parameter | Value | Test Conditions |
| Rated Voltage | 5 V (o-p) | At 25 ℃ |
| Operating Voltage | 4 – 7 V (o-p) | Continuous operation |
| Sound Output | ≥ 85 dB | At 5 V, 10 cm distance |
| Resonant Frequency | 3000 ± 300 Hz | At rated voltage |
| Operating Current | ≤ 30 mA | At 5 V |
| Operating Temperature | -30 ℃ ~ +70 ℃ | Functional |
| Storage Temperature | -40 ℃ ~ +85 ℃ | Non-operational |
| Parameter | Value |
| Dimensions (L × W × H) | 9.6 × 9.6 × 5.0 mm |
| Weight | 1.5 g |
| Housing Material | Black LCP |
| Soldering Temperature (Reflow) | 255 ± 5 °C, 3 s; Preheat 180 °C, 40–70 s |
| Soldering Temperature (Wave) | 255 ± 15 °C, 4–6 s |
| Soldering Temperature (Manual) | 360 ± 10 °C, 2–5 s |
| Max Reflow Passes | 3 |
| Operating Temperature | -30 ℃ ~ +70 ℃ |
| Storage Temperature | -40 ℃ ~ +85 ℃ |
Industrial PLC alarm modules — fault indication and emergency stop alerts in programmable logic controllers and motor drive systems where 5 V or 24 V logic rails are standard and immediate acoustic feedback upon trigger is mandatory
Medical diagnostic instrumentation — completion signals, error warnings, and calibration status tones in benchtop analyzers, patient monitors, and dialysis equipment where electromagnetic compatibility and consistent output are regulated requirements
Commercial refrigeration and cold-chain logistics — door-open alarms, temperature breach notifications, and compressor fault alerts in walk-in freezers, transport containers, and pharmaceutical storage units operating at sub-zero ambient temperatures
Telecommunications outdoor enclosures — cabinet intrusion detection, power failure alarms, and thermal excursion warnings in base station repeaters and network edge nodes exposed to uncontrolled weather conditions
Automotive interior subsystems — seatbelt reminders, key-in-ignition chimes, and charging status indication in electric vehicle instrument clusters and commercial vehicle cabins where 5 V accessory buses are prevalent
| Engineering Requirement | MLT-9650Y-5V Advantage |
| Minimize BOM complexity | Integrated oscillator eliminates external driver IC, base resistor, flyback diode, and PWM firmware development |
| Ensure voltage robustness | 4–7 V range accommodates 5 V nominal with headroom for battery sag, regulator tolerance, and transient suppression |
| Guarantee acoustic consistency | Factory-tuned 3000 Hz resonance with ±10% batch tolerance; no driver circuit tuning or per-unit calibration required |
| Support automated SMT assembly | Standard tape-and-reel packaging with vacuum nozzle pick-up compatibility; reflow peak 255 °C |
| Operate in thermally challenging environments | -30 °C to +70 °C operating range outperforms standard consumer-grade limits; -40 °C storage supports cold-chain logistics |
The 1.5 g mass contributes to mechanical stability under vibration conditions common in industrial machinery and vehicular applications. The diaphragm assembly maintains consistent acoustic output under mechanical shock, while the 5.0 mm height provides adequate internal cavity volume for efficient 3 kHz resonance generation.
MEIDI manufactures the 9.6*9.6*5mm SMD Magnetic Active Buzzer on automated assembly lines with 100% electrical and acoustic functional testing. Each production batch undergoes comprehensive environmental and mechanical stress verification:
•High-temperature storage — 48 hours at +80 ± 2 °C, followed by 2-hour ambient recovery and full parametric verification
•Low-temperature storage — 48 hours at -30 ± 2 °C, followed by 2-hour ambient recovery
•Thermal shock cycling — 5 cycles between -30 °C and +80 °C with 30-minute dwell per extreme
•Vibration resistance — sinusoidal sweep 10–55 Hz, 1.0 mm amplitude, XYZ axes, 0.5 hours cumulative
•Mechanical shock — 75 cm free-fall drop onto 10 mm hardwood, 3 impacts
•Humidity endurance — 48 hours at 50 ± 5 °C / 90–95% RH, followed by 2-hour ambient recovery
•Solder heat resistance — 250 ± 5 °C for 10 ± 0.5 seconds with 2.0 mm body-to-solder clearance
Sample batch test data confirms consistent performance within specification: sound pressure 94.1--96.1 dB, current 24.4--26.4 mA, frequency 2987--3011 Hz (all within 3000 ± 300 Hz specification), with zero dimensional or polarity defects.
Q1: Can the MLT-9650Y-5V be driven directly from a 3.3 V microcontroller GPIO?
No. The minimum operating voltage is 4 V, and 3.3 V falls below the guaranteed functional threshold. While the buzzer may produce reduced output or fail to oscillate entirely at 3.3 V, reliable operation requires a minimum 4 V supply. For 3.3 V systems, consider a 5 V boost converter or select a 3 V-rated active buzzer from the MEIDI portfolio.
Q2: What is the acoustic lifetime under continuous operation at maximum rated voltage?
The integrated oscillator and electromagnetic transducer are qualified for continuous operation at 5 V and 25 °C ambient. Lifetime extends under intermittent duty cycles typical of alarm applications. Contact factory for specific lifetime data. For continuous-tone applications such as emergency evacuation signals, thermal management of the enclosure should be considered to prevent heat accumulation.
Q3: How does the integrated oscillator affect electromagnetic compatibility compared to externally driven passive buzzers?
The internal oscillator operates at a fixed 3000 Hz with controlled rise and fall times, producing predictable harmonic content limited primarily to odd harmonics (9 kHz, 15 kHz, etc.) that fall outside typical conducted and radiated emission test bands. Unlike PWM-driven passive buzzers where switching noise depends on driver circuit layout, gate drive impedance, and PCB routing, the MLT-9650Y-5V presents a consistent electrical load with minimal high-frequency content, generally resulting in lower EMC emissions and simplified compliance testing.
Q4: What enclosure design considerations apply to the 5.0 mm height profile?
The 5.0 mm body height requires adequate unobstructed clearance above the PCB surface to prevent acoustic obstruction. Additional clearance above the sound aperture is recommended to avoid sound pressure degradation from nearby surfaces or components. For enclosures with grilles or membranes, acoustic impedance matching should be evaluated; dense meshes may attenuate output. The 9.6 mm square footprint provides stable mechanical mounting on standard 1.6 mm FR4 substrates.
Q5: Are OEM modifications such as custom tape-and-reel packaging or alternative pin configurations supported?
Yes. MEIDI supports OEM customization including modified tape-and-reel specifications, alternative packaging quantities, and custom labeling for high-volume orders. Lead form modifications for through-hole conversion are not applicable to the SMD MLT-9650Y-5V, but custom solder paste stencil recommendations and reflow profile guidance are available through applications engineering. Minimum order quantities and lead times vary by modification scope.
For technical datasheets, CAD footprints, sample requests, or OEM integration guidance for the MLT-9650Y-5V, contact MEIDI Engineering Support.
MEIDI applications engineering typically responds to technical inquiries within one business day
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