QYC3316 1.2V Active Piezo Buzzer – 33x16x15mm Compact Mechanical Buzzer with Low Voltage Operation

Description

The QYC3316 Active Piezo Buzzer is a compact, low-voltage sound generator designed for applications where conventional 3V–5V buzzers are not suitable. Operating from just 1.2V DC, this buzzer is specifically engineered for single-cell battery-powered devices, energy-harvesting circuits, and ultra-low-voltage embedded systems. Housed in a standard 33×16×15mm rectangular package, the QYC3316 combines a piezoelectric ceramic element with a built-in drive circuit, producing a clear, 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 — a tone that is clearly audible to the human ear. The built-in oscillator simplifies integration: connect the positive and negative terminals to a 1.2V DC source, and the buzzer produces sound immediately.

The 1.2V operating voltage is the defining feature of this model. Standard active buzzers typically require 3V or more, making them incompatible with single-cell alkaline (1.5V) or NiMH (1.2V) batteries without a boost converter. The QYC3316 eliminates that requirement, making it ideal for single-battery devices such as:

• Battery testers and voltage monitors

• Low-power timers and reminders

• Portable medical devices (glucose meters, thermometers)

• Toys and novelties powered by a single AA or AAA cell

• Energy-harvesting sensor nodes with limited voltage rails

• Ultra-low-power embedded systems requiring audible feedback

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, and educational STEM projects where a simple, reliable audible indicator is needed at very low voltages.

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 1.2V rated voltage means this buzzer is not suitable for 3.3V or 5V circuits directly — applying higher voltage may damage the internal drive circuit or produce excessive volume. If you need to operate from a higher voltage rail, use a voltage regulator or series resistor 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 single-battery alarm, a low-power medical device, or a compact reminder, the QYC3316 1.2V Active Piezo Buzzer provides a reliable, integrated solution for audible feedback at the lowest practical voltage.

Features

• 1.2V ultra-low voltage operation — Ideal for single-cell battery devices (AA, AAA, NiMH)

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

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

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

• 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 — Battery testers, low-power timers, medical devices, toys, energy-harvesting nodes

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

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

Technical Specifications