MLT-5020

Part: MLT-5020 — Jiangsu Huawha Electronics Co., Ltd. (HUAWHA)

Type: Magnetic Buzzer Transducer (SMD)

Description: 3.0 Vo-p rated, 4000 ± 200 Hz magnetic buzzer transducer with minimum 75 dB SPL at 0.1 m, 12 ± 3 Ω coil resistance and a 5.2 × 5.2 × 2 mm body.

Operating Conditions:

• Supply voltage: 2–4 Vo-p (rated 3.0 Vo-p)
• Operating temperature: -20 to +70 °C
• Recommended drive: square wave at resonant frequency, 1/2 duty cycle, with signal amplitude large enough to saturate the drive transistor

Absolute Maximum Ratings:

• Storage temperature: -30 to +85 °C

Key Specs:

• Rated voltage: 3.0 Vo-p
• Sound pressure level: min 75 dB (standard drive circuit, rated voltage, 0.1 m)
• Current consumption: max 100 mA (rated voltage, 0.1 m)
• Coil resistance: 12 ± 3 Ω
• Oscillation frequency: 4000 ± 200 Hz
• Weight: 0.5 g
• Housing material: LCP

Features:

• Compact 5.2 × 5.2 × 2 mm body
• LCP housing (black)
• Reliability tests include high/low temperature, humidity, temperature cycling, vibration, drop, terminal pull strength, solderability and reflow soldering

Applications:

Package:

• SMD, 5.2 × 5.2 × 2 mm (tolerance ±0.3 mm unless specified)

This document is a piezo buzzer (MLT-5020) product specification, not an IC. It has two polarity terminals (+POLARITY and -POLARITY) shown on the dimension drawing, with no numbered pin table in the source. Pin numbers cannot be determined from the source material.

Package: SMD buzzer, 5.2 x 5.2 x 2 mm (LCP housing)

Notes:

• The source does not number the terminals. Pin Number is shown as "?" for both rows because numbering could not be determined from the source material.
• The dimension drawing marks the +POLARITY and -POLARITY terminals; the sound port ("SOUND PORT", ø0.8 mm) is an acoustic opening, not a pin.
• In the typical driving circuit shown in the source, pin 1 is VDD (VCC), pin 2 is EN (driven from MCU I/O), pin 3 is GND, and pin 4 is OUT (to buzzer). This circuit diagram refers to a driver IC and is not part of the MLT-5020 buzzer's own pinout; it should not be taken as the buzzer's pin numbering.
• Operating voltage 2 to 4 Vo-p, rated 3.0 Vo-p, oscillation frequency 4000 ± 200 Hz, coil resistance 12 ± 3 Ω, max current 100 mA.

No ordering table or variant information for MLT-5020 was found in this datasheet section. The document covers general specifications, electrical/acoustical test conditions, reliability tests, dimensions, frequency response, and a packing heading (section 6) whose content is not included.