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Ten small green circuit modules with pins in a row

SMUGDESK

SMUGDESK HI-Link HLK-2M03 220V to 3.3V 600mA Data Converter 10 pcs

SKU CH-2T8K-AS0WS

A pack of 10 isolated modules that step 220 V mains down to a steady 3.3 V 600 mA DC supply for microcontrollers, relays and smart-switch circuits

  • Isolated 220 V AC to 3.3 V DC conversion protects low-voltage circuits
  • 600 mA stable output powers microcontrollers, relays and sensors reliably
  • Built-in over-current, short-circuit and over-temperature protection prevents damage
  • Compact epoxy-encapsulated module solders easily into small smart-switch housings
  • Pack of 10 units supports volume DIY and maintenance projects

Isolated AC-DC step-down module pack

This pack contains ten SMUGDESK HI-Link HLK-2M03 modules that convert 220V AC mains to a fixed 3.3V DC output rated at 600mA. Each unit uses fully encapsulated epoxy resin construction with an internal isolation barrier separating high-voltage input from low-voltage output. The integrated design simplifies soldering directly onto compact control boards for household smart devices.

Suited for DIY smart-switch builds.

Builders creating intelligent wall switches, touch panels, sensor nodes or relay drivers will find the fixed 3.3V rail convenient for microcontrollers and wireless modules. Projects requiring adjustable voltage, higher current than 600mA, or non-isolated topologies should look at alternative power solutions.

Stable output with protection during continuous

The module maintains regulated 3.3V under sustained load thanks to built-in over-current, short-circuit and over-temperature safeguards. Protection circuits activate automatically during abnormal conditions, allowing the converter to recover without damage when the fault clears, supporting reliable long-term use in embedded household automation.

How it compares

Measured against everything we stock in Serial & Protocol Converters, at today’s prices. Recalculated every night.

Price $34.99
Pricier than about 67% of the 121 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What mains voltage must my circuit already accept for these modules to work?

The modules require a 220V AC mains supply on the input side to produce the 3.3V DC output.

Can I keep using my existing 5V relay board with one of these converters?

The converter supplies a fixed 3.3V 600mA output; a 5V relay board would not receive the voltage it needs.

How do I confirm a module is operating correctly after soldering it in?

Measure the output terminals with a multimeter; a steady 3.3V DC reading under load shows the module is working.

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