Hi-Link HLK-PM01 5V 3W AC-DC Isolated Power Supply Module

The Hi-Link HLK-PM01 5V/3W Switch Power Supply Module is a compact, enclosed, PCB-mountable AC-to-DC isolated switching power supply module designed to provide a stable 5V DC output from AC mains power. It is suitable for powering microcontrollers, sensors, relay modules, IoT devices, automation systems, and other low-power electronic circuits.

The module is designed for direct PCB integration and features an isolated switching power-supply architecture, providing a compact alternative to traditional bulky transformers. Its small form factor, high efficiency, low power consumption, and natural cooling make it suitable for space-constrained embedded applications.

With a stated 3W power rating, the module can provide up to approximately 600mA at 5V, subject to the specific module specifications and operating conditions. It also incorporates overload and short-circuit protection for improved safety and reliability.

The HLK-PM01 is suitable for applications such as smart-home devices, industrial automation, control systems, communication equipment, instrumentation, and DIY electronics projects where an isolated low-voltage DC supply is required from an AC mains source.

Features

• Compact AC-to-DC isolated switching power supply
• Provides 5V DC output
• 3W rated power
• Wide AC input range
• PCB-mountable enclosed design
• High efficiency and power density
• Low power consumption
• Low ripple and low noise
• Output overload protection
• Output short-circuit protection
• High-security electrical isolation
• Natural cooling design
• Compact and lightweight construction
• Suitable for embedded applications
• Designed for smart-home and automation systems
• Suitable for DIY electronics projects
• Designed to meet stated EMC and safety requirements
• UL and CE requirements as stated

Specifications

Parameter	Specification
Product Type	Isolated AC-DC Switching Power Supply Module
Model	HLK-PM01
Input Voltage	AC 90–264V*
Nominal Mains Range	120V–230V AC
Output Voltage	5V DC
Rated Power	3W
Approx. Maximum Output Current	600mA at 5V*
Cooling	Natural Cooling
Protection	Overload / Short Circuit
Installation	PCB Mount
Isolation	Isolated Output
No-Load Power Consumption	<0.1W*
Operating Temperature	-20°C to +60°C
Storage Temperature	-40°C to +80°C
Relative Humidity	5–95%
Atmospheric Pressure	80–106kPa
Maximum Recommended Altitude	≤2000m

*Refer to the specific supplied module and manufacturer datasheet for exact electrical limits and output-current specifications.

Design and Construction

The HLK-PM01 features a compact PCB-mountable design with an enclosed construction that helps protect the internal switching power-supply circuitry. Its small size allows it to be integrated directly into electronic control boards and embedded devices.

The module uses a switching power-supply topology to convert AC mains voltage into a regulated low-voltage DC output. Compared with conventional linear power supplies, the switching design provides improved efficiency and reduced heat generation.

The isolated output makes the module suitable for applications where electrical separation between the mains input and low-voltage electronics is required.

Working Principle

The module receives AC mains power at its input and converts it into a stable 5V DC output through a high-frequency switching conversion process.

The AC input is processed by the internal power-supply circuit and converted into a controlled low-voltage DC output. The switching architecture helps maintain efficient power conversion while reducing heat generation.

The module includes protection against output overload and short-circuit conditions, helping protect the power supply and connected circuitry under abnormal operating conditions.

Input and Output

The module is designed to accept a wide AC input range of approximately 90V to 264V AC, allowing it to operate across common mains-voltage environments.

The output is a regulated 5V DC supply suitable for low-power electronic circuits.

Typical applications include powering:

• Microcontrollers
• Sensors
• Relay modules
• IoT devices
• Display modules
• Communication modules
• Control circuits
• Automation electronics

The connected load should remain within the module’s rated power and current limits.

Power Rating

The HLK-PM01 has a stated power rating of 3W. At a nominal 5V output, this corresponds to approximately 600mA maximum output current under suitable operating conditions.

For reliable long-term operation, the connected load should remain within the manufacturer’s specified limits. Actual available output power may depend on input voltage, ambient temperature, enclosure design, and operating conditions.

Protection Features

The module includes protection features designed to improve reliability:

• Overload protection – Helps protect the power supply when the output load exceeds its rated capability.
• Short-circuit protection – Helps protect the module if the output is accidentally shorted.

These protections should not be treated as a substitute for correct wiring, fusing, and electrical safety practices.

Environmental Conditions

The module is designed for the following stated environmental conditions:

• Operating temperature: -20°C to +60°C
• Storage temperature: -40°C to +80°C
• Relative humidity: 5–95%
• Atmospheric pressure: 80–106kPa
• Altitude: Up to approximately 2000m
• Cooling: Natural convection

Actual performance may vary depending on installation conditions and enclosure ventilation.

Applications

• Smart-home devices
• IoT systems
• Home automation
• Industrial automation
• Control systems
• Embedded electronics
• Microcontroller projects
• Arduino projects
• ESP32 projects
• Relay control boards
• Sensor systems
• Communication equipment
• Instrumentation
• Security systems
• Access-control systems
• LED control circuits
• PCB-mounted power supplies
• DIY electronics projects
• Low-power embedded devices

Advantages

• Compact and space-saving design
• Direct PCB mounting
• Isolated AC-to-DC conversion
• Wide input voltage range
• Stable 5V DC output
• Low power consumption
• High efficiency
• Low heat generation
• Overload protection
• Short-circuit protection
• Natural cooling
• Suitable for embedded applications

Package Includes

• 1 × Hi-Link HLK-PM01 5V/3W AC-DC Switch Power Supply Module

Important Safety Information

This module connects directly to hazardous AC mains voltage. Installation, wiring, testing, and enclosure design should be performed by a qualified or experienced person.

Always disconnect mains power before handling the module. Maintain adequate creepage, clearance, insulation, enclosure protection, and fuse protection as required by the application.

Do not touch the input-side circuitry while the module is connected to mains power. The low-voltage output should also be treated according to the isolation and safety requirements of the final product.

Product Disclaimer

Product images are for illustrative and representational purposes only. The actual product may vary slightly in colour, enclosure markings, PCB layout, component placement, dimensions, or overall appearance depending on the manufacturing batch.

The AC input range, output current, isolation characteristics, protection features, and environmental specifications should be verified against the datasheet of the exact HLK-PM01 version supplied.

Arduino boards, ESP32 boards, sensors, wires, relays, enclosures, and other components shown in product images are not included unless specifically mentioned in the package contents.