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HLK-PM03 AC/DC Power Module 3.3V 1A 3W

The HLK-PM03 is a compact, high-efficiency AC/DC power module that converts 85V–265V AC input into a stable 3.3V DC output with up to 1A (3W) current. Designed for reliability and safety, this module is perfect for powering low-voltage electronics such as microcontrollers (ESP8266, ESP32, STM32), wireless modules, sensors, and other 3.3V devices directly from a wall outlet.

With built-in overcurrent, overvoltage, and short-circuit protection, the HLK-PM03 ensures safe and stable power delivery for your sensitive circuits.

Category: Relays

Description
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Description

Key Features

✔ Wide Input Voltage Range (85V–265V AC) – Works with any standard AC power source worldwide.
✔ Stable 3.3V DC Output @ 1A (3W Max) – Reliable power for 3.3V microcontrollers and peripherals.
✔ High Efficiency (≥70%) – Low heat generation, energy-saving operation.
✔ Compact & Lightweight – Space-saving design for embedded applications.
✔ Built-in Protections – Overcurrent, overvoltage, and short-circuit protection.
✔ Low Ripple & Noise – Clean power output for sensitive electronics.
✔ UL94-V0 Flame-Retardant Housing – Safe and durable construction.
✔ Easy to Install – Screw terminals for secure wire connections.

Technical Specifications

Input Voltage: 85V–265V AC (50/60Hz)
Output Voltage: 3.3V DC (±5%)
Output Current: 1A (Max)
Output Power: 3W
Efficiency: ≥70%
Ripple & Noise: ≤100mV (Typical)
Operating Temperature: -40°C to +85°C
Protections: Overcurrent, Overvoltage, Short-Circuit
Safety Standards: CE, RoHS Compliant
Dimensions: 50mm × 28mm × 21mm
Weight: ~40g

Applications

3.3V Microcontroller Power Supply – ESP8266, ESP32, STM32, Raspberry Pi Pico.
Wireless & IoT Devices – Wi-Fi, Bluetooth, Zigbee modules.
Sensors & Modules – Low-power sensors, relays, and small displays.
Embedded Electronics – DIY projects, prototypes, and testing.
Industrial Control Systems – Low-power automation circuits.

How It Works

The HLK-PM03 converts high-voltage AC mains power into a stable 3.3V DC output using switching regulator technology. Simply connect the Live (L) and Neutral (N) wires to the input terminals and the 3.3V+/GND to your device. The module automatically regulates voltage fluctuations, ensuring a steady power supply.

Package Includes

1 × HLK-PM03 3.3V 1A Power Module
(Optional) Screw terminals / pre-soldered wires

Why Choose the HLK-PM03?

✅ Safe & Reliable – Built-in protections prevent damage to connected devices.
✅ Global Voltage Compatibility – Works with 110V/220V AC power sources.
✅ Energy Efficient – Minimizes power loss for cooler operation.
✅ Plug-and-Play – No complex wiring; ready to use.

Get Yours Today!

Power your 3.3V electronics safely and efficiently with the HLK-PM03 3.3V 1A AC/DC Power Module – the ideal solution for stable, low-voltage power conversion!

🔹 Order now and enjoy hassle-free power for your 3.3V projects! 🔹