HLK-PM01 AC-DC Intelligent Power Supply Module (220V AC to 3.3V DC)(Black)

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.