Hi-Link HLK-20M24 24V 20W AC to DC Step-Down Switch Power Supply Module

Power high-voltage relays, industrial sensors, and 24V automation equipment directly from mains power with the Hi-Link HLK-20M24 24V 20W Switch Power Supply Module. Designed as a compact, PCB-mount isolated AC-DC step-down converter, it transforms wide universal input AC voltages ( $90 ext{V}$ to $264 ext{V AC}$ ) into a regulated, low-ripple 24V DC output at up to 833mA (20W). Featuring flame-retardant encapsulation, robust overload/short-circuit protection, ultra-low standby power consumption ( $<0.1 ext{W}$ no-load), and $3000 ext{V AC}$ input-to-output isolation, it is the premier choice for industrial controls, home automation hubs, and embedded equipment.

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Tags Hi Link HLK 20M24 HLK-20M24 24V 20W AC DC Step Down Module 24V 833mA Power Module Isolated SMPS Module PCB Mount AC DC Converter 24V Industrial Power Supply Smart Home Power Module

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Product Details :

The Hi-Link HLK-20M24 24V/20W Switch Power Supply Module is an encapsulated, high-power AC-DC converter designed to safely deliver a steady $24 ext{V DC}$ supply directly on a single circuit board. Eliminating bulky external desktop power adapters or exposed open-frame transformers, the HLK-20M24 packs a full $20 ext{W}$ switched-mode power supply (SMPS) into a compact, potted plastic enclosure.

Engineered to operate seamlessly on global AC mains voltage ranges from 90V AC up to 264V AC (50Hz/60Hz), it outputs a highly regulated 24V DC rail at up to 833mA continuous load. Its fully isolated construction—providing $3000 ext{V AC}$ input-to-output isolation—shields downstream control electronics and microcontrollers against line spikes and electrical noise. Its $24 ext{V}$ output rail is ideal for powering industrial PLCs, $24 ext{V}$ solenoids, motor drivers, LED strips, and high-voltage relay setups in automated industrial and home control cabinets.

Key Features and Benefits

Compact Encapsulated PCB-Mount Module: Fully potted plastic casing plugs directly into standard through-hole PCBs or prototyping boards, protecting components from dust and moisture.
Global Universal AC Input Range: Operates reliably from $90 ext{V AC} - 264 ext{V AC}$ ( $50/60 ext{Hz}$ ), ensuring full compatibility with domestic and international grid standards.
Stable 24V 833mA (20W) Output: Delivers clean $24 ext{V DC}$ with low output ripple and high voltage stability under varying loads.
High Safety & Electrical Isolation: $3000 ext{V AC}$ isolation between input and output ensures high operational safety for low-voltage control systems.
Built-In Comprehensive Protections: Integrated short-circuit, over-current, and over-temperature safety protection circuits automatically recover once fault conditions clear.
Low Standby Power & High Efficiency: Features high conversion efficiency with ultra-low no-load power consumption ( $< 0.1 ext{W}$ ), ideal for always-on automated systems.

Technical Specifications

Feature Component	Specification Details
Model Designation	HLK-20M24 (Hi-Link 20W Series)
Input Voltage Range ( $V_{AC}$ )	$90 ext{V AC} - 264 ext{V AC}$ ( $100 ext{V} - 240 ext{V}$ Nominal)
Input Frequency Range	$47 ext{ Hz} - 63 ext{ Hz}$
Output Voltage ( $V_{DC}$ )	$24.0 ext{V DC} pm 0.2 ext{V}$ (Regulated)
Maximum Output Current	$833 ext{ mA}$ ( $0.833 ext{A}$ ) Continuous
Maximum Rated Power	$20.0 ext{ Watts}$
Full Load Efficiency	$ge 80%$
No-Load Power Consumption	$< 0.1 ext{ Watts}$
Input-to-Output Isolation	$3000 ext{V AC}$ for 1 minute
Output Ripple & Noise	$le 100 ext{ mVp-p}$
Short-Circuit Protection	Automatic recovery upon fault removal
Operating Temperature	$-20^circ ext{C to } +60^circ ext{C}$

Pinout & Wiring Guide

The HLK-20M24 features 4 heavy-duty through-hole PCB pins clearly labeled on its housing:

Input Side (High Voltage AC):

AC / L (Pin 1): Connect to Live / Phase mains input wire ( $90 ext{V} - 264 ext{V AC}$ ).
AC / N (Pin 2): Connect to Neutral mains input wire.

Output Side (Low Voltage DC):

-V0 / GND (Pin 3): Ground / Negative output rail ( $0 ext{V DC}$ ).
+V0 / +24V (Pin 4): Regulated $+24 ext{V DC}$ positive output rail.

Safety Warning: The AC input side carries lethal line voltages ( $110 ext{V}-230 ext{V AC}$ ). Always maintain appropriate high-voltage PCB creepage distances, properly insulate AC connections, and ensure mains power is disconnected before touching or installing the board.

Applications

Industrial Automation & PLCs: Powers $24 ext{V}$ industrial controllers, DIN-rail modules, human-machine interfaces (HMIs), and field sensors.
24V Actuators & Solenoids: Drives heavy $24 ext{V}$ contactors, electric valves, solenoids, and motor drivers in automated machinery.
Dual-Stage Power Distribution: Supplies a main $24 ext{V}$ rail that steps down via buck regulators to $5 ext{V}$ or $3.3 ext{V}$ for embedded logic controllers.
Building & Smart Home Automation: Serves as a hidden internal AC-DC power converter for centralized smart lighting and security control boxes.