Hi Link HLK 5M24 24V/5W AC to DC Switch Power Supply Module

Specifications

• Module Type: Isolated AC to DC Step-Down Switching Power Supply
• Model Number: HLK-5M24
• Input Voltage Range: 100V ~ 240V AC (50Hz / 60Hz Universal Range)
• Output Voltage: 24V DC (Regulated)
• Maximum Output Current: 208mA
• Output Power: 5 Watts
• No-Load Power Consumption: < 0.1W (Eco-Friendly / High Efficiency)
• Protection Features: Integrated output overload protection and short-circuit protection
• Safety & Compliance: Designed to meet EMC and Safety Test requirements (UL, CE standards)
• Cooling Method: Natural convection / free air cooling
• Operating Temperature Range: -25°C to +60°C
• Operating Humidity: 5% to 95% RH (Non-condensing)
• Package Type: Sealed Flame-Retardant Plastic Enclosure
• Mounting: Through-Hole PCB Mount

Applications

• Industrial Automation Nodes: Powering 24V industrial relays, solenoid valves, and indicator stack lights directly from grid power.
• Smart Building & HVAC Controls: Integrating 24V power for motorized dampers, thermostats, and RS485 Modbus telemetry nodes inside wall junction boxes.
• PLC Interface Boards: Supplying isolated 24V logic power for programmable logic controller inputs/outputs without external power bricks.
• Instrumentation & Process Control: Clean 24V rail generation for 4-20mA process loop transmitters and precision industrial sensors.

Unlock New Capabilities

• Past Projects: You previously used external 12V or 5V power adapters with boost converters or separate plug-in wall warts, creating messy wiring and point-of-failure power cables.
• The Upgrade: Upgrading to the HLK-5M24 allows you to design professional, self-contained hardware where high-voltage AC grid power enters directly onto your PCB and outputs a clean, isolated 24V rail for industrial-grade peripherals.
• Effort Level: Intermediate to Advanced. Requires clear understanding of high-voltage AC mains handling, high-voltage PCB trace layout standards, and proper electrical safety isolation practices.

Package Included:

• 1 x Hi-Link HLK-5M24 24V 5W Power Supply Module.

Frequently Asked Questions (FAQ)

• What is the maximum continuous current output of the HLK-5M24?
  It can output up to 208mA at 24V DC continuously (5W total rating).
• Is the 24V DC output electrically isolated from the AC input mains?
  Yes, the module features high-grade internal galvanic isolation between the AC mains side and the DC output side.
• Can I use this to drive 24V relays directly?
  Yes, as long as the total current draw of all relays active simultaneously does not exceed 208mA.
• Does it consume high power when my system is in standby?
  No, it features an ultra-low no-load standby power consumption of less than 0.1W.
• Do I need an external heatsink to run this at 5W?
  No heatsink is required; the encapsulated housing relies on natural air convection cooling under normal operating conditions.
• Can I power an Arduino or ESP32 directly from this module?
  Not directly into their 5V/3.3V pins. You must step down the 24V output to 5V or 3.3V using a DC-DC buck converter (such as an LM2596 or MP1584 buck module) first.
• What protection mechanisms are built into the HLK-5M24?
  It includes built-in output overload protection and short-circuit protection for system safety.
• What happens if a short circuit occurs on the 24V output?
  The module automatically limits/cuts power output until the short circuit condition is removed, protecting the internal electronics.
• What is the input AC voltage range?
  It accepts a wide universal input voltage ranging from 100V AC to 240V AC at both 50Hz and 60Hz.
• Can it handle 230V AC standard Indian mains voltage?
  Yes, it is fully rated to operate reliably on standard 230V AC Indian grid power.
• Are the pins standard breadboard pitch compatible?
  The pins are designed for direct PCB solder mounting and have thicker pins; forcing them into standard solderless breadboards is not recommended.
• Can I connect two HLK-5M24 modules in parallel to get 10W / 416mA?
  No, standard isolated switching power supplies should not be connected directly in parallel without dedicated current-sharing circuitry.
• Is this power supply module waterproof?
  No, while encapsulated in flame-retardant plastic, it is not IP-rated for liquid contact and must be housed in a protective enclosure.
• Why should I put an MOV across the AC input pins?
  A Metal Oxide Varistor absorbs high-voltage grid transients and lightning surges, protecting the Hi-Link module from overvoltage destruction.
• Does the module require external capacitors to work?
  It functions standalone, but placing a 100uF electrolytic capacitor on the output reduces switching ripple for high-precision analog electronics.