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Black rectangular 90W AC adapter with 7.4 to 4.5mm dongle

DELL

DELL MKN5F 90W AC Adapter with 7.4 to 4.5mm dongle

SKU CH-AXE3-QKW8X MPN MKN5F

90 W AC adapter with a 7.4 mm to 4.5 mm dongle for select Inspiron and Latitude models

  • TypeAC Adapter
  • AC Adapter Output Power90W
  • 90W output powers and charges compatible Dell laptops
  • Included 7.4mm to 4.5mm dongle fits both connector sizes
  • Works with Inspiron 14, 15 and 17 models including 3437, 3537 and 3737
  • Supports Latitude 3330, 3340, 3440, 3450, 3540 and 3550
  • Compatible with Latitude E5250, E5440, E5450, E5540 and E5550

What this adapter powers

The DELL MKN5F delivers 90W output to run or charge compatible Inspiron and Latitude laptops from a wall outlet. It ships new with a converting dongle that changes the tip from 7.4mm to 4.5mm. The unit uses OEM grade components for reliable operation.

What the dongle changes

The included converter lets the single adapter fit two different barrel sizes found across the listed models. Without it the 7.4mm tip would only match the larger port. With it installed the same brick also serves the 4.5mm port used on several Latitude and Inspiron units.

Check your laptop before ordering

Verify that your model appears in the compatibility list: Inspiron 14 3437, 14R 5437, 15 3537, 15 7000 7537, 15R 5537, 17 3737, 17 7000 7737, 17R 5737, Latitude 3330, 3340, 3440, 3450, 3540, 3550, E5250, E5440, E5450, E5540, E5550, E6440, E6540, E7240, E7440, Rugged Extreme 7404. Confirm the required tip size matches either 7.4mm or 4.5mm.

Highlights

  • 90W output powers and charges compatible Dell laptops
  • Included 7.4mm to 4.5mm dongle fits both connector sizes
  • Works with Inspiron 14, 15 and 17 models including 3437, 3537 and 3737
  • Supports Latitude 3330, 3340, 3440, 3450, 3540 and 3550
  • Compatible with Latitude E5250, E5440, E5450, E5540 and E5550

Specifications

BrandDELL
ModelMKN5F
TypeAC Adapter
AC Adapter Output Power90W
Shipping weight0.48 kg
Package size229 × 152 × 51 mm

Questions about this item

Does the 7.4mm to 4.5mm dongle wear out and need replacing?

The dongle is a passive connector; it has no moving parts and does not degrade under normal use.

What limits the 90W output during continuous charging?

The adapter delivers its rated 90W continuously; the laptop's own charging circuitry regulates the actual draw.

How hot or noisy does the MKN5F get when left plugged in all day?

It runs silently with no fan; the enclosure warms to typical adapter temperature but stays within normal operating limits.

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