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

Description

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