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Square black 40mm case fan with four wires

Fans

Fans TAA0412DDX01 4020 40x40x20mm 4-line 12V 0.9A case fan

SKU CH-YCYN-H4144

12 V 40 mm server fan with four-wire control, 20 mm thick and rated at 0.9 A

  • Compact 40 mm square footprint fits tight server chassis
  • Four-wire PWM interface enables precise speed control
  • 12 V / 0.9 A rating delivers strong airflow for dense builds
  • 20 mm thickness balances cooling performance with space savings

TAA0412DDX01 4020 12V 4-line fan

This 40 mm square fan measures 20 mm thick and runs on 12 V at 0.9 A. The four-wire connector allows speed reporting and PWM control for precise airflow management. It is built for server chassis and compact workstations that demand high static pressure in tight spaces. New condition ensures full rated performance from first power-on.

Replaces lower-flow 40 mm fans

Swapping a standard 4020 unit for this model raises airflow where clearance is fixed at 40 mm. The upgrade is worthwhile when component density blocks larger fans and thermal headroom is exhausted. Builders needing quieter operation or larger frame sizes should look elsewhere.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 85% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 40x40x20mm frame fit my server chassis?

The fan measures 40 mm square by 20 mm thick, so verify your chassis has a 4020 mounting pattern before ordering.

Which wire on the 4-line connector is the PWM control?

The fourth wire carries the PWM signal; connect it to the motherboard’s 4-pin header for speed control.

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