PAM8403 3W Stereo Audio Amplifier Module | 5V Class D
PAM8403 3W+3W Class D Stereo Audio Amplifier
The PAM8403 is a compact class D stereo audio amplifier module capable of delivering 3 watts per channel into 4-ohm speakers using a 5V supply. It is ideal for battery-powered audio projects, portable speakers, and embedded sound systems where efficiency and minimal heat dissipation are critical.
Key Specifications
| Specification | Value |
|---|---|
| Supply Voltage | 2.5V – 5.5V DC |
| Output Power | 3W+3W (4Ω, 10% THD) at 5V |
| Efficiency | Up to 90% |
| Signal-to-Noise Ratio (SNR) | 80dB |
| Channel Separation | 50dB |
| Quiescent Current | ~6mA |
What You Can Build With This
- Portable Bluetooth speaker powered by a 5V USB battery bank
- DIY mono or stereo computer speakers for workshops or classrooms
- Audio output stage for Raspberry Pi or Arduino music player projects
- Small arcade cabinet or retro gaming console audio system
Compatibility
The PAM8403 accepts standard line-level analog audio input and works directly with 3.3V or 5V boards such as Arduino Uno, ESP32, and Raspberry Pi Pico. It pairs well with Bluetooth modules like the HC-05 or CNY-70 for wireless audio streaming. No external amplification is needed for standard AUX or headphone outputs.
Wiring Notes
Connect VCC to a clean 5V DC supply, GND to ground, and left/right input pins to your audio source. Keep input wires short and away from speaker output wires to avoid noise. No external pull-ups or output filters are required.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, simply connect the amplifier’s left/right input to two Arduino PWM-capable pins for mono audio, or use a dedicated audio shield for stereo. Power the module from the Arduino’s 5V pin if current draw is within limits.
Can I power it directly from a USB port?
Absolutely. A standard USB port provides 5V, which is ideal for the PAM8403. Many projects use a micro-USB breakout or a phone charger to supply power.
Does it produce noticeable heat during operation?
No, the PAM8403 is highly efficient and remains cool to the touch even at full volume, eliminating the need for heat sinks in most applications.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items