Description
Product Description
The HLK-PM01 AC-DC Intelligent Power Supply Module is a compact, PCB-mountable power module designed to convert high-voltage AC mains (220V AC) into a stable 3.3V DC output. With a 3W power rating and up to 0.9A current capacity, this module is ideal for powering low-voltage electronics such as microcontrollers, IoT devices, sensors, and embedded systems.
It features electrical isolation, high efficiency, and built-in protection circuits, making it a safe and reliable solution for applications where space is limited and direct AC-to-DC conversion is required. Its small size allows easy integration into custom PCBs, smart devices, and automation projects.
⚙️ Detailed Specifications
General Information
Model: HLK-PM01
Type: AC-DC Isolated Power Supply Module
Mounting: PCB Mount
Input Specifications
Input Voltage Range: 90V – 264V AC
Rated Input Voltage: 220V AC
Input Frequency: 50 / 60 Hz
Max Input Current: ≤ 0.2A
Output Specifications
Output Voltage: 3.3V DC
Output Power: 3W
Maximum Output Current: 0.9A
Voltage Accuracy: ±0.2V
Ripple & Noise: ≤ 70mV (peak-to-peak)
Performance
Efficiency: ≥ 70%
No-Load Power Consumption: < 0.1W
Load Regulation: ±0.5%
Protection Features
Over-current protection
Short-circuit protection
Automatic recovery after fault removal
Isolation & Safety
Electrical Isolation: Yes (AC input isolated from DC output)
High-voltage isolation suitable for embedded use
Environmental
Operating Temperature: −20°C to +60°C
Storage Temperature: −40°C to +80°C
Physical Characteristics
Dimensions (Approx.): 35 × 21 × 16 mm
Weight: Lightweight, compact module
🛠️ Typical Applications
ESP8266 / ESP32 / 3.3V microcontroller boards
IoT devices and smart sensors
Home automation controllers
Industrial control circuits
Embedded electronics projects
Low-power communication modules
❓ Frequently Asked Questions (FAQ)
Q1: What is the output of this module?
A: The module provides a regulated 3.3V DC output, with a maximum power of 3W and up to 0.9A current.
Q2: Can it directly power ESP8266 or ESP32 boards?
A: Yes. The 3.3V output is suitable for ESP8266, ESP32, sensors, and other 3.3V logic devices, provided the total current draw stays within limits.
Q3: Is the output isolated from the AC mains?
A: Yes. The module has built-in electrical isolation, improving safety and reducing the risk of high-voltage exposure.
Q4: Does it include protection features?
A: Yes. It has short-circuit and over-current protection with automatic recovery.
Q5: Can it run continuously?
A: Yes. The module is designed for continuous operation within its rated power and temperature limits.
Q6: Do I need external components for safety?
A: For best practice, it is recommended to use:
An input fuse
Proper PCB isolation distances
Enclosure insulation when used with mains voltage
Q7: Is this suitable for commercial products?
A: Yes. It is commonly used in commercial and industrial embedded designs, but proper certification and safety testing are recommended for final products.
