Hi-Link HLK-5M05 5V 5W AC-DC Step-Down Switch Power Supply Module

Power your embedded microcontrollers directly from mains power with the Hi-Link HLK-5M05 5V 5W Switch Power Supply Module. Designed as an ultra-compact, PCB-mount isolated AC-DC step-down converter, it converts wide input AC voltages ( $90 ext{V}$ to $264 ext{V AC}$ ) into a stable, low-ripple 5V DC output at up to 1A (5W). Featuring flame-retardant plastic encapsulation, short-circuit protection, low power consumption ( $<0.1 ext{W}$ no-load), and high isolation, it is the industry-standard choice for smart home automation, IoT nodes, and compact embedded designs.

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Tags Hi Link HLK 5M05 HLK-5M05 5V 5W AC DC Step Down Module 5V 1A Power Module Isolated SMPS Module PCB Mount AC DC Converter Arduino Mains Power Supply Smart Home Power Module

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Product Details :

The Hi-Link HLK-5M05 5V/5W Switch Power Supply Module is an encapsulated, highly integrated AC-DC power converter designed to safely bridge high-voltage mains power directly to low-voltage electronics on a single PCB. Unlike traditional bulky power adapters or open-frame transformers, the HLK-5M05 packs a complete switched-mode power supply (SMPS) into a tiny, fully potted plastic shell.

Capable of accepting a global universal AC input voltage range from 90V AC up to 264V AC (50Hz/60Hz), it delivers a regulated 5V DC output with up to 1000mA (1A) of continuous current. Its fully isolated construction (providing up to $3000 ext{V AC}$ input-to-output isolation) protects sensitive microcontrollers like ESP32, ESP8266, Arduino, and PIC chips from high-voltage grid spikes. Its ultra-low standby power dissipation makes it an eco-friendly option for smart home relays, IoT sensors, and automated wall switches that stay plugged in continuously.

Key Features and Benefits

Compact PCB-Mount Footprint: Fully enclosed potted module easily plugs into standard through-hole PCB designs or protoboards.
Global Universal AC Input: Accepts wide input voltages ( $90 ext{V AC} - 264 ext{V AC}$ at $50/60 ext{Hz}$ ), making it suitable for international power grids.
Stable 5V 1A (5W) Output: Delivers clean $5 ext{V DC}$ output with low output ripple and tight voltage regulation (± $pm 0.2%$ ).
High Electrical Safety & Isolation: Features continuous input-to-output isolation up to $3000 ext{V AC}$ , protecting downstream electronics.
Integrated Safety Protections: Built-in overload, short-circuit, and over-temperature safety circuits protect both the module and connected loads.
Eco-Friendly Low Standby Power: Consumes less than $0.1 ext{W}$ under no-load conditions, meeting Energy Star efficiency expectations.

Technical Specifications

Feature Component	Specification Details
Model Designation	HLK-5M05 (Hi-Link 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 ( $V_{DC}$ )	$5.0 ext{V DC} pm 0.1 ext{V}$ (Regulated)
Maximum Output Current	$1000 ext{ mA}$ ( $1.0 ext{A}$ ) Continuous
Maximum Rated Power	$5.0 ext{ Watts}$
Full Load Efficiency	$ge 70%$
No-Load Power Consumption	$< 0.1 ext{ Watts}$
Input-to-Output Isolation	$3000 ext{V AC}$ for 1 minute
Output Ripple & Noise	$le 50 ext{ mVp-p}$
Short-Circuit Protection	Automatic recovery upon fault removal
Operating Temperature	$-20^circ ext{C to } +60^circ ext{C}$

Pinout & Wiring Guide

The HLK-5M05 features 4 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 / +5V (Pin 4): Regulated $+5 ext{V DC}$ positive output rail.

Safety Warning: The AC input side carries high line voltages ( $110 ext{V}-230 ext{V AC}$ ) that pose severe electric shock hazards. Always insulate AC solder joints and ensure the unit is unplugged before touching or handling connections.

Applications

Smart Home & Wall Switches: Powers ESP8266 / ESP32 WiFi relay boards concealed inside standard in-wall switch boxes.
IoT Sensor Gateways: Supplies continuous power to remote sensor nodes, smart locks, and environment monitors connected to grid power.
Industrial Controls: Provides low-power control logic supplies for mains-operated industrial automation boards.
DIY Custom Power Supplies: Ideal for embedding into custom enclosures where using an external USB wall adapter is inconvenient or impractical.