Products

MEIDI 4216 Active Piezo Alarm Buzzer — 41.8 × 16 mm plug-in electronic alarm, nominal voltage 12VDC, operating voltage range 3–24V. The built-in oscillator generates a fixed-tone alarm at 2800–2950 Hz with ≤8 mA current, requiring no external drive circuitry. Sample-proven, the 41.8 mm piezoelectric diaphragm delivers a sound pressure level of 101–107 dB, suitable for industrial hazard alarm panels, fire alarm networks, security systems, and heavy equipment proximity alarms. The threaded ABS housing allows for panel mounting in high-vibration environments. For sample evaluation, bulk quotes, and custom tone configurations, please submit an inquiry.

MEIDI 12.5mm Piezo Ceramic Buzzer Element pairs a 12.5 mm piezoelectric ceramic disc with a brass substrate, resonating at 7.8 kHz with 12000 pF capacitance and ≤300 Ω equivalent resistance. Compared with the 11.0 mm FT-11T series, the wider 12.5 mm diameter adds 29% more active surface area. This translates directly to higher sound pressure and improved low-frequency performance using the same drive circuitry. A tighter ±10.3% frequency tolerance and 40% lower equivalent resistance ensure consistent acoustic output across multi-unit installations — ideal for premium consumer, medical, and industrial sensor applications. Ask for evaluation samples with per-unit impedance and frequency test reports, or send an RFQ for volume pricing and custom electrode configurations.

MEIDI 11mm Brass Piezo Ceramic Element features an 11.0 mm piezoelectric ceramic disc mounted on a brass substrate, with a 9.0 kHz resonant frequency and 12000 pF capacitance. As the higher-frequency counterpart to the FT-11T-7.8A1, it shares the same 0.18 mm thickness and 11 mm diameter. This means designers can swap the two directly for acoustic A/B testing without any mechanical changes. The 8.0 mm active electrode diameter is tuned for strong electromechanical coupling at the higher resonance point. Well-suited for smart wearables, portable medical devices, and compact IoT sensor nodes that need sharp, clear tonal alerts. Evaluation samples come with individual frequency and capacitance readings, and RFQs are welcome for volume pricing or custom electrode layouts.

MEIDI 11mm Piezo Ceramic Buzzer Element combines an 11.0 × 0.18 mm piezoelectric ceramic disc with a brass backing, resonating at 7.8 kHz and carrying 12000 pF capacitance. At under 0.2 mm thick, it slides easily into ultra-slim acoustic modules for smart wearables, portable medical gear, and IoT sensor enclosures. The brass substrate delivers thermal stability and solder-friendly surfaces, whether mounted via direct PCB bonding or spring-contact retention. With an equivalent resistance of ≤500 Ω, it pairs efficiently with LC resonant drive designs. Ask for evaluation samples including per-unit frequency and capacitance test results, or send an RFQ for volume pricing and custom electrode options.

MEIDI 12*12*3mm SMD Piezoelectric Passive Buzzer is a 3V SMD piezoelectric passive buzzer with a 12.0 × 12.0 × 3.0 mm footprint. Driven by an external PWM signal, it produces ≥80 dB at 4.0 kHz. Its broad 1–25 V operating range covers everything from logic-level signals to industrial bus voltages, so no driver redesign is needed across applications. With 14 nF capacitance and ≤5 mA current draw, it runs efficiently straight from an MCU GPIO pin. The extended -30 °C to +70 °C rating works for both commercial and light-industrial installations. Send an RFQ or request evaluation units now. Volume pricing and OEM frequency tuning are both available.

MEIDI 9×4.5mm SMD Magnetic Passive Buzzer offers three SMD electromagnetic passive buzzers in a shared 9.0 × 4.5 mm form factor, each producing ≥85 dB at 2.7 kHz. The lineup includes the MLT-9045-16R at 16 Ω / 3.6V and the MLT-9045-32R at 32 Ω / 5V, both in standard LCP housings. For higher acoustic output, the MLT-9045F-16R adds a copper-ring enhanced magnetic circuit to the same footprint. Get a quote or order free samples today. OEM customization and bulk pricing are both available.