• FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector
  • FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector
  • FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector
  • FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector
  • FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector
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ZhanPeng

FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector

FSP420-ACAU3 420W 20V 21A Power Adapter with 5.5mm × 2.5mm Connector

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Description
Compatibility
FAQ

The 420W power adapter known as FSP420-ACAU3 is an AC power supply which is intended for use with equipment needing a 20V DC output, a current of 21A and a power rating of 420W. It has an AC input range of 100 to 240V at a frequency of 50 to 60Hz and includes a DC connector of dimensions 5.5mm × 2.5mm which lacks an internal pin. A power cable is provided, and the type of plug—US, EU, AU or UK—is chosen depending on the shipping address. It is important that, before you buy it, you check that your device is compatible with the specified voltage, current, wattage, connector size and polarity.

Key Features

  • 420W rated power: Provides a rated output of 420W at 20V and 21A for compatible equipment.

  • Wide-range AC input: Supports 100–240V AC at 50–60Hz for use with compatible electrical systems.

  • 5.5mm × 2.5mm DC connector: Uses a barrel-style connector with no internal pin. Confirm the physical dimensions and polarity of your device's DC input.

  • Multiple power plug options: A US, EU, AU, or UK power cable is supplied according to the shipping address, as specified in the listing.

  • Safety and compliance information: The product listing states CE, FCC, and RoHS certification. Verify the applicable markings and documentation for the specific unit.

  • Identifiable replacement model: FSP420-ACAU3 is the listed model number for checking product compatibility.

Technical Specifications

Specification Details
Brand FSP
Model Number FSP420-ACAU3
Product Type AC Power Adapter / Power Supply
Rated Output Power 420W
Output Voltage 20V DC
Output Current 21A
Input Voltage 100–240V AC
Input Frequency 50–60Hz
DC Connector Size 5.5mm × 2.5mm
Center Pin No internal pin
Compliance Claims CE, FCC, RoHS, as stated in the listing
Power Cable Included
Plug Options US / EU / AU / UK, according to shipping address
Compatible Part Number FSP420-ACAU3

Compatible Part Number

FSP420-ACAU3

Use this model number to compare the replacement adapter with your existing power supply. The model number alone does not establish compatibility with every device that accepts a 20V adapter.

How to Check Compatibility

Before ordering the FSP420-ACAU3, check the following:

  1. Output voltage: Your device must require a compatible 20V DC power supply.

  2. Current and power requirements: Confirm that the device's specified current and power requirements are supported by the adapter.

  3. Connector size: Verify that your device accepts a 5.5mm × 2.5mm barrel connector.

  4. Connector polarity: Check the positive and negative polarity shown on the original adapter or device label.

  5. Power requirements under load: Confirm that the device is designed for a power supply rated at 420W and does not require a different electrical specification.

  6. AC power cable: Check that the supplied regional plug is suitable for your location and wall outlet.

Important: A matching connector does not guarantee compatibility. Do not connect the adapter unless the voltage, polarity, connector, and device power requirements have been verified.

 

 

Frequently Asked Questions

1. What is the output specification of the FSP420-ACAU3?

The listed output is 20V DC at 21A, with a rated power of 420W.

2. What is the connector size of the FSP420-ACAU3 adapter?

The connector measures 5.5mm × 2.5mm and has no internal pin. Check the connector dimensions and polarity against your device's original power supply.

3. Does the FSP420-ACAU3 support worldwide input voltage?

It is specified for 100–240V AC input at 50–60Hz. You must still use a suitable power cable and a compatible local electrical supply.

4. Which power cable is included?

The package includes one power cable. The listing specifies US, EU, AU, or UK plug options according to the shipping address. Confirm the exact plug type before ordering if you have a specific requirement.

5. Is the FSP420-ACAU3 compatible with every 20V device?

No. The device must also support the required power rating, connector size, and polarity. Check the original power adapter's label and the device manufacturer's specifications.

6. Can I use this 420W adapter with a device that requires less than 420W?

Potentially, but only if the device's voltage, polarity, connector, and power requirements are compatible and the manufacturer permits the use of this type of supply. A higher wattage rating alone does not establish compatibility.

7. Does this adapter have a center pin?

No. The product specifications state that the 5.5mm × 2.5mm connector has no internal pin.

8. What certifications are listed for this power supply?

The product listing states CE, FCC, and RoHS certification. Buyers who require formal compliance documentation should verify the markings and documents for the exact unit being supplied.

9. What is included in the package?

The package includes one FSP420-ACAU3 power adapter and one power cable.

10. How can I confirm that FSP420-ACAU3 is the correct replacement?

Compare the model number, output voltage, current, power rating, connector dimensions, and polarity with your original adapter or device specifications. If any of these details differ, confirm compatibility before connecting the power supply.

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