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Black rectangular AC adapter model A1627 with US plug prongs

Microsoft

Microsoft A1627 12V 4A 48W AC adapter

SKU CH-XQ6F-0EYWN MPN A1627

A 12 V, 48 W replacement power supply for the Surface Pro 3 docking station, accepting 100–240 V input and including thermal, overload and short-circuit protection

  • Product colorBlack
  • Worldwide 100-240V input suits travel
  • 12V 4A output delivers 48W power
  • Automatic thermal protection prevents overheating
  • Overload cut-off guards against excess current
  • Short circuit protection secures connected devices

Purpose-built power

This 48 W AC adapter is designed to power the Microsoft Surface Pro 3 Docking Station. It delivers a steady 12 V at 4 A so the dock can charge the tablet and run its connected peripherals without interruption. The unit is intended for users who need a replacement or spare power supply for that specific dock.

Capacity and headroom

The adapter accepts a universal 100-240 V input at 50-60 Hz, making it suitable for worldwide mains supplies. Its fixed 12 V 4 A output provides exactly the wattage the dock requires; it cannot supply more current for higher-demand devices. Protection circuits guard against thermal overload and short circuits.

Build integration

A standard USA plug connects directly to a wall outlet or power strip, while the output cable terminates in the proprietary connector that mates with the Surface Pro 3 Dock. No additional cables or converters are needed. The compact black enclosure occupies minimal desk space and frees the dock’s own port selection for data and display connections.

How it compares

Measured against everything we stock in Other Adapters & Couplers, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 58% of the 1,754 comparable items (median $18.99).

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Specifications

Product
Product colorBlack

Questions about this item

Will the 12V 4A output on this A1627 adapter power my original Surface Pro 3 dock reliably?

Yes, it delivers the exact 12V 4A (48W) rating the dock requires, with automatic thermal, overload and short-circuit protection.

How can I confirm the adapter is operating correctly once connected?

The dock's power indicator lights and the Surface charging icon on screen will show normal operation when the adapter is working properly.

Does the package include the mains lead or only the adapter brick with its fixed US plug?

The unit is the adapter brick with a fixed US-standard plug; no separate mains cable is included.

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