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Black rectangular AC adapter with 2.5x0.7mm plug and 10ft cable

myVolts

myVolts 12V 3.33A 2.2A 40W AC Adapter 2.5x0.7mm 10ft

SKU CH-A7EW-0TBN2

12 V 40 W AC adapter with a 2.5 × 0.7 mm plug and 10 ft cord for Samsung Chromebook and Ativ models

  • Worldwide voltage support from 100-240V input
  • 40W output delivers 12V at 3.33A and 2.2A
  • 5x0.7mm connector fits listed Samsung models
  • 10ft total cord length for flexible placement
  • Replaces part numbers A12-040N1A AD-4012 AD-4012NHF

Power Adapter for Samsung Devices

This 40W AC adapter delivers 12V at 3.33A and 2.2A through a 2.5x0.7mm connector. It is built for Samsung Chromebook and Ativ series laptops and tablets that require this exact voltage and tip size. The unit accepts a 100-240V input range for worldwide use. Total cord length reaches 10ft for flexible placement.

Suits owners of listed Samsung models.

Buyers with a Samsung Chromebook 1, 2, 3, 303C, 500C or 503C series, or an Ativ Smart PC, Tab, or Book 9 matching the compatible part numbers, can use this charger. It will not fit devices that need a different connector diameter, a higher wattage, or a proprietary USB-C power profile. Users who have lost the original DTK or Samsung adapter with part numbers such as A12-040N1A or AA-PA3N40W get a direct replacement.

Deciding spec: 2.5x0.7mm barrel connector

The 2.5mm outer and 0.7mm inner diameter is the single dimension that determines physical compatibility. If the laptop power jack does not match this exact barrel size, the plug will not seat and the adapter cannot supply power. Verify the port on your Samsung Chromebook or Ativ device before purchase.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 64% of the 27,790 comparable items (median $30.99).

Specifications

No published specifications for this item yet.

Questions about this item

Does the adapter come with the mains cable included or do I need to buy one separately?

The package contains the power brick with a 2.5x0.7mm barrel connector and a 10 ft total cord length, so no separate cable is required.

My Samsung Chromebook 2 XE503C32 needs 12 V 3.33 A — will this 40 W unit deliver that?

Yes, the adapter outputs 12 V at 3.33 A and 2.2 A for a 40 W total, matching the Chromebook 2 XE503C32 requirement.

What does the 40 W rating mean when I plug it into my Ativ Book 9 NP930X2K?

It means the supply can provide up to 40 W continuously, enough to charge the NP930X2K while you use it.

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