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Black rectangular 12V 3.0A 36W power adapter with detachable power cord

DVE

DVE DSA-0421S-12 12V 3.0A 36W power adapter

SKU CH-PJX4-B10ES MPN DSA-0421S-12

Delivers 12 V at 3 A for 36 W, accepts 100-240 V 50/60 Hz input and includes a power cord

  • Works worldwide with 100-240 V 50/60 Hz input
  • Delivers steady 12 V 3.0 A for reliable device power
  • 36 W capacity handles demanding loads without strain
  • Includes power cord for immediate setup
  • Built-in safeguards against incorrect voltage, short circuit and overheating

What this adapter powers

The DVE DSA-0421S-12 supplies a steady 12V at 3.0A for a total of 36W. It suits devices such as routers, small monitors or external drives that require exactly this voltage and current. The unit accepts a universal 100-240V input at 50/60Hz, so it works on mains supplies worldwide. A standard power cord is included in the box.

Replacing a lost or faulty brick

This adapter replaces an original supply that has failed, been misplaced or damaged. The jump is worth it when the replacement matches the original 12V 3.0A rating and the barrel connector fits the device. Using a unit with a different voltage or lower current can cause instability or hardware stress. The 1.2A input draw keeps mains loading modest.

Limits of the fixed 12V output

The output is locked at 12V and cannot be adjusted for equipment that needs 5V, 9V or any other voltage. Maximum continuous power is capped at 36W, so devices drawing more than 3.0A will overload the adapter. The supply is designed for indoor use only and offers no protection against water ingress. No additional cables or tips beyond the included cord are provided.

How it compares

Measured against everything we stock in AC Adapters & Power Bricks, at today’s prices. Recalculated every night.

Price $36.99
Pricier than about 71% of the 3,875 comparable items (median $23.99).

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Specifications

Product
Model nameDSA-0421S-12 2 36

Questions about this item

What AC plug style does the included power cord use?

The adapter accepts 100-240 V at 50/60 Hz with a 1.2 A draw, so the cord matches the local mains plug for the region of purchase.

Which step is most often missed when connecting the 12 V 3.0 A output to a device?

Confirm the device requires exactly +12 V and no more than 3.0 A before plugging the barrel jack in; reversing polarity or exceeding the current rating causes immediate shutdown.

How do I know when the 36 W unit should be replaced?

Replace it if the output voltage drifts from +12 V, the adapter becomes unusually hot, or the protection against short circuit and internal overheating triggers repeatedly.

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