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Black rectangular AC adapter with two barrel connectors 5.5 by 2.5 mm and 5.5 by 2.1 mm

BASEUS

BASEUS 12V 3A 36W AC Adapter 5.5x2.5mm 5.5x2.1mm

SKU CH-M1QR-CMAC3

Converts 100-240V AC to 12V 3A DC with both 5.5x2.5mm and 5.5x2.1mm tips and 6.7ft cable

  • TypeAC Adapters
  • Delivers stable 12 V DC at up to 3 A for low‑power devices
  • Works worldwide with 100–240 V AC input
  • Includes both 5.5×2.5 mm and 5.5×2.1 mm barrel tips
  • 7 ft cable gives flexible placement on a hard flat surface
  • Built‑in over‑voltage, over‑current and over‑temperature protection safeguards connected gear

What this adapter powers

This BASEUS unit converts 100-240V AC mains into a stable 12V DC supply rated at 3A and 36W. It is intended for low-power equipment such as routers, LED strips or small monitors that draw 3000mA or less. The 6.7 ft cable ends in a 5.5 x 2.5 mm barrel plug that also fits a 5.5 x 2.1 mm socket. Polarity is centre-positive.

When it replaces an old supply

It replaces any 12V adapter that has failed or been lost, provided the original device does not exceed the 3A limit. The jump is worth it when the previous unit lacked over-voltage, over-current and over-temperature protection, or when a single replacement must cover both 2.5 mm and 2.1 mm centre-pin sizes. Indoor use on a hard flat surface is required for safe heat dissipation.

Limits of the barrel-connector interface

The 5.5 mm outer diameter with interchangeable 2.5 mm and 2.1 mm inner pins covers many common DC jacks, yet it cannot serve devices that need a different voltage, a higher current or a locking connector. The 205 cm cable length restricts placement to within roughly two metres of a socket. Soft surfaces such as beds or carpets block airflow and must be avoided.

Highlights

  • Delivers stable 12 V DC at up to 3 A for low‑power devices
  • Works worldwide with 100–240 V AC input
  • Includes both 5.5×2.5 mm and 5.5×2.1 mm barrel tips
  • 7 ft cable gives flexible placement on a hard flat surface
  • Built‑in over‑voltage, over‑current and over‑temperature protection safeguards connected gear

Specifications

TypeAC Adapters

Questions about this item

What barrel connector sizes does the 5.5 mm plug fit?

The tip fits both 5.5 x 2.5 mm and 5.5 x 2.1 mm sockets. The centre pin is positive and the sleeve is negative.

How do I install the adapter so it does not overheat?

Place the 36 W unit on a hard flat surface with clearance around it. Do not rest it on beds carpets fabrics or rubber which block heat dissipation.

When should I replace the power cable?

Replace the 205 cm cable if the insulation is cracked the barrel tip is bent or the connector becomes loose in the device socket.

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