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Small black square 40mm cooling fan with two wires

Fans

Fans D4020B12H 40x40x20mm 12V .17A 2-wire case fan

SKU CH-VHY9-9FEWA

A 40 mm square, 20 mm thick case fan running on 12 V at 0.17 A with a two-wire connection

  • Compact 40 × 40 × 20 mm frame fits tight builds
  • 12 V operation powers directly from standard headers
  • Low 0.17 A draw keeps system power budget lean
  • Simple 2-wire connection installs in seconds

40 mm 12 V case fan

This 40 by 40 by 20 mm case fan runs on 12 V and draws 0.17 A through a two-wire connection. It fits the standard 4020 mounting pattern used in many compact enclosures and server chassis. The unit is supplied new and ready for immediate installation.

Direct 4020 replacement

It replaces an existing 4020 fan with the same voltage and current rating when the original unit fails or becomes noisy. The jump is worth it when the current fan no longer spins reliably or when a fresh two-wire unit is required for a controlled cooling circuit.

Highlights

  • Compact 40 × 40 × 20 mm frame fits tight builds
  • 12 V operation powers directly from standard headers
  • Low 0.17 A draw keeps system power budget lean
  • Simple 2-wire connection installs in seconds

Specifications

No published specifications for this item yet.

Questions about this item

What are the exact mounting-hole dimensions for the 4020 fan?

The fan measures 40 mm square and 20 mm thick, so mounting holes follow the standard 40 mm spacing.

How do I connect the 2-wire lead to a 12 V header without reversing polarity?

Align the red wire to the 12 V pin and the black wire to ground on the motherboard or controller header.

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