PAM8403 Digital Power Amplifier
PAM8403 Digital Power Amplifier
PAM8403 Digital Power Amplifier
Compact, efficient Class-D stereo audio amplifier module from The Tech Depot, Bengaluru. Delivering 2x3W output from a tiny board, the PAM8403 is the go-to amplifier for portable speakers, DIY audio projects, and embedded sound systems. Fast shipping, 7-day warranty on manufacturing defects, and dedicated support.
Specifications
| Amplifier IC | PAM8403 (Class-D) |
| Output Power | 2 x 3W (into 4Ohm, 5V supply) |
| Channels | Stereo (Left + Right) |
| Supply Voltage | 2.5V - 5.5V DC |
| Efficiency | Up to 90% (Class-D switching) |
| THD+N | < 0.1% at 1kHz, 1W output |
| SNR | > 80 dB |
| Speaker Impedance | 4Ohm - 8Ohm recommended |
| Audio Input | 3.5mm stereo or solder pads (L, R, GND) |
| Quiescent Current | ~10mA (very low standby draw) |
| Board Size | Approx. 30mm x 20mm |
| Onboard Features | Volume potentiometer, power indicator LED |
| No Heat Sink Required | Filterless Class-D design runs cool |
| Origin | Original/Authentic IC |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 |
Why Choose the PAM8403 Amplifier?
- Incredible efficiency: Class-D topology delivers up to 90% power efficiency - ideal for battery-powered projects with minimal heat generation
- True stereo output: Dual-channel 3W+3W drives two speakers independently for immersive left/right audio separation
- Ultra-compact footprint: Tiny 30x20mm board fits inside portable speakers, robots, wearable devices, and tight enclosures
- USB-powered simplicity: Runs directly from 5V USB, power banks, Arduino 5V pins, or 3xAA batteries - no bulky power supply needed
- Onboard volume control: Built-in potentiometer for easy analog volume adjustment without additional circuitry
- Low noise floor: SNR above 80dB and THD below 0.1% ensures clean, distortion-free audio at moderate listening levels
- No external filter components: Filterless output design reduces BOM cost and simplifies wiring to speakers
- Plug-and-play connectivity: Feed audio from smartphones, MP3 modules, Bluetooth receivers, Raspberry Pi, or any 3.5mm line-level source
- 100% authentic PAM8403 IC sourced from trusted suppliers - consistent performance guaranteed
- 1-5 day shipping, 7-8 day delivery from our Bengaluru warehouse with same-day dispatch available
Project Ideas
- Portable Bluetooth Speaker: Pair with a Bluetooth audio receiver module (like KCX_BT) and two 4Ohm speakers to build a rechargeable wireless speaker powered by a single 18650 cell or USB power bank
- Raspberry Pi Media Center: Add high-quality stereo sound to your Pi-based media player, retro gaming console, or smart mirror - connect directly to the 3.5mm audio jack
- Arduino Talking Projects: Combine with a DFPlayer Mini MP3 module to add voice prompts, alarms, sound effects, or music playback to interactive Arduino projects
- Desktop PC/Laptop Speaker: Build a compact powered speaker set for your workstation - plug into the headphone jack and power via USB port
- Robot Voice & Sound Effects: Give your robot audible feedback - play navigation alerts, greeting messages, or obstacle warnings through onboard speakers
- Intercom & PA System: Use with a microphone preamplifier for a simple one-way announcement or intercom system in workshops or classrooms
- Guitar Practice Amp: Build a tiny battery-powered practice amplifier for electric guitar or ukulele pickup - great weekend DIY project
- IoT Doorbell / Alert System: Integrate with ESP32 or NodeMCU to play custom notification tones triggered by motion sensors, doorbells, or MQTT messages
- Educational Audio Experiments: Teach students about Class-D amplification, PWM audio, signal-to-noise ratio, and speaker impedance matching hands-on
Wiring Guide
| PAM8403 Pin | Connection |
| VCC (+) | 5V DC ( |
Frequently Asked Questions
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy PAM8403 Digital Power Amplifier Online in India
Purchase the PAM8403 Digital Power Amplifier online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on PAM8403 Digital Power Amplifier with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy PAM8403 Digital Power Amplifier at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.