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QYC3316 3V Active Piezo Buzzer – 33x16x15mm Compact Electromagnetic Alarm for Electronics (2315 Type)

SKU: FA3048-6-1
Model

QYC3316
Buzzer Type

Piezoelectric Active Buzzer (built-in oscillator)
Rated Voltage

3V DC
Resonant Frequency

~2.7kHz – 3.1kHz (typical)
Operating Temperature

-20°C to +60°C (typical)
Mounting Type

Through-hole, 2-pin solderable
Housing Dimensions

33 × 16 × 15 mm (approximate)
Sound Output

Continuous tone (audible in quiet to moderate environments)

The QYC3316 3V Active Piezo Buzzer is a compact, reliable sound generator designed for a wide range of electronic applications requiring clear audible alerts, notifications, and status feedback. Operating from a standard 3V DC supply, this buzzer is ideal for 3.3V microcontroller systems, two-cell battery devices, and low-voltage embedded designs. Housed in a compact 33×16×15mm rectangular package (2315 type), the QYC3316 combines a piezoelectric ceramic element with a built-in drive circuit, producing a continuous tone without any external PWM signal or oscillator circuitry.

At the heart of the buzzer is a piezoelectric ceramic disc bonded to a metal diaphragm. When the internal drive circuit applies an oscillating voltage across the ceramic element, it expands and contracts, causing the diaphragm to vibrate at a fixed resonant frequency of approximately 2.7kHz to 3.1kHz — a tone that is clearly audible to the human ear. The built-in oscillator simplifies integration: connect the positive and negative terminals to a 3V DC source, and the buzzer produces sound immediately.

The 3V rated operating voltage makes this buzzer particularly well-suited for modern low-power electronics. It can be powered directly from:

  • 3.3V microcontroller systems (with a small series resistor or voltage regulation)

  • Two-cell battery configurations (2×AA, 2×AAA, 2×coin cell)

  • Single-cell lithium batteries with regulation (3.0V–3.3V output)

  • USB power rails with voltage division (5V USB requires a resistor or regulator)

  • Energy-harvesting circuits with 3V rails

The buzzer features solderable pin terminals for through-hole mounting on PCBs, with clearly marked polarity. The rectangular 33×16×15mm housing provides a stable mounting surface and protects the internal piezo element from dust and physical damage. The compact form factor allows integration into handheld devices, small enclosures, and space-constrained designs.

The QYC3316 is widely used in low-voltage alarm circuits, portable electronic devices, battery-powered timers, medical monitors, toys, home automation devices, and educational STEM projects where a simple, reliable audible indicator is needed at 3V operation.

Important Note: The QYC3316 is an active buzzer — it produces a fixed tone when powered and cannot play melodies or variable frequencies. For variable tones, use a passive buzzer with PWM control. The 3V rated voltage means this buzzer is best suited for 3V–3.3V circuits — applying higher voltage (such as 5V) directly may damage the internal drive circuit or produce excessive volume. If you need to operate from a 5V rail, use a series resistor or voltage regulator to drop the voltage to the rated level. The buzzer is not waterproof and should be kept dry. Verify polarity before connecting — reverse polarity may damage the internal oscillator.

Whether you are designing a portable alarm, a low-power medical device, or a compact reminder, the QYC3316 3V Active Piezo Buzzer provides a reliable, integrated solution for audible feedback at 3V operation.

Features

  • 3V operating voltage — Ideal for 3.3V microcontroller systems and two-cell battery devices

  • Active buzzer with built-in oscillator — Produces sound directly from DC voltage; no PWM required

  • Fixed 2.7kHz–3.1kHz tone — Clear, audible continuous sound for alerts and notifications

  • Compact 33×16×15mm package — Rectangular form factor for stable PCB mounting (2315 type)

  • Piezoelectric ceramic element — Low current draw, high efficiency

  • Solderable pin terminals — Simple through-hole installation with polarity marking

  • Built-in drive circuit — No external components required

  • Wide application range — Portable alarms, medical devices, timers, toys, home automation

  • Cost-effective — Affordable solution for low-voltage audible indication

  • Reliable performance — Piezo element resists mechanical wear and has long service life

Technical Specifications

# Parameter Specification
1 Model QYC3316
2 Buzzer Type Piezoelectric Active Buzzer (built-in oscillator)
3 Rated Voltage 3V DC
4 Resonant Frequency ~2.7kHz – 3.1kHz (typical)
5 Operating Temperature -20°C to +60°C (typical)
6 Mounting Type Through-hole, 2-pin solderable
7 Housing Dimensions 33 × 16 × 15 mm (approximate)
8 Sound Output Continuous tone (audible in quiet to moderate environments)

Usage

Getting Started

  1. Identify the pins — Determine the positive (+) and negative (-) terminals. Polarity is usually marked on the housing or by pin length.

  2. Connect power — Apply 3V DC across the terminals (positive to +, negative to -). The buzzer will produce a continuous tone immediately.

  3. Control with a microcontroller — For MCU control, use a transistor driver circuit to switch the buzzer on and off. The MCU GPIO can drive the base of the transistor while the buzzer is powered from the 3V rail.

  4. Transistor driver circuit — Connect the buzzer positive to the 3V supply, buzzer negative to a transistor collector, transistor emitter to GND, and transistor base to MCU GPIO through a resistor (e.g., 1kΩ).

  5. Upload control code — Set the GPIO pin HIGH to turn the buzzer on, LOW to turn it off.

Pin Connections

Buzzer Pin Function
Positive (+) Connect to 3V supply
Negative (-) Connect to GND (or transistor collector)

Power Source Compatibility

Power Source Suitability
3.3V MCU Rail Yes (with small series resistor)
2×AA Alkaline (3V) Yes (ideal)
2×AAA Alkaline (3V) Yes (ideal)
1×LiPo with 3.0V LDO Yes
5V USB No — requires voltage reduction
1.2V NiMH No — insufficient voltage

Example Arduino Code (via Transistor Driver)

cpp
#define BUZZER_PIN 8

void setup() {
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  digitalWrite(BUZZER_PIN, HIGH);  // Buzzer ON
  delay(500);
  digitalWrite(BUZZER_PIN, LOW);   // Buzzer OFF
  delay(500);
}

Transistor Driver Circuit

Component Connection
Buzzer + 3V supply
Buzzer – Transistor Collector
Transistor Emitter GND
Transistor Base MCU GPIO via 1kΩ resistor

Typical Applications

  • Portable alarms — Audible alert for battery-powered devices

  • Low-power timers — Reminder alert for 3V timers

  • Portable medical devices — Glucose meters, thermometers, diagnostic equipment

  • Toys and novelties — Battery-powered sound effects

  • Home automation devices — Appliance status, doorbell, notification sounds

  • Educational STEM projects — Teaching low-voltage electronics and sound generation

Notes for Business Buyers

  • 3V rated voltage — Designed for 3V–3.3V operation; do not connect directly to 5V rails without voltage reduction.

  • Active buzzer — Fixed tone, no PWM required; simple DC voltage drive.

  • Transistor driver recommended — For MCU control, use a transistor to isolate the buzzer from the MCU.

  • Suitable for bulk purchasing — Ideal for portable device manufacturers, toy makers, and educational institutions.

Q: What is the QYC3316 3V Active Piezo Buzzer used for?

It is a 3V active buzzer for producing audible alerts and notifications in portable devices, low-power timers, medical devices, toys, and home automation products.

Q: What voltage does the buzzer require?

The rated voltage is 3V DC. It is designed for 3V–3.3V operation.

Q: Can I connect this buzzer directly to a 3.3V microcontroller pin?

Direct connection is not recommended because the buzzer may draw more current than a GPIO pin can safely supply. Use a transistor driver circuit to switch the buzzer while powering it from the 3V rail.

Q: Can I connect this buzzer directly to a 5V microcontroller pin?

No. The 3V rated voltage means 5V will overdrive the internal circuit and may damage the buzzer. Use a series resistor or voltage regulator to reduce the voltage to 3V.

Q: What is the difference between an active and passive buzzer?

An active buzzer has a built-in oscillator and produces a fixed tone when powered. A passive buzzer requires an external PWM signal and can produce different frequencies and melodies.

Q: What is the sound output frequency?

The buzzer produces a tone at approximately 2.7kHz to 3.1kHz, typical for active piezoelectric buzzers.

Q: How do I connect the buzzer to an Arduino?

Use a transistor driver circuit with a 3V supply. Connect the buzzer between the 3V supply and the transistor collector, emitter to GND, and base to MCU GPIO through a resistor.

Q: Is the buzzer waterproof?

No. The QYC3316 is not waterproof and should be kept dry.

Q: Can I play different tones or melodies with this buzzer?

No. The QYC3316 is an active buzzer with a fixed tone. It cannot play melodies or variable frequencies.

Q: Can I purchase in bulk for a product development project?

Yes. The QYC3316 is suitable for bulk purchasing by portable device manufacturers, toy makers, and educational institutions.

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