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Small black square 40x40x15mm 5V PWM case fan with four-pin connector

Fans

Fans ASB0405LB 40x40x15mm 5V PWM case fan

SKU CH-1WS3-PBX2G

Compact 40×40 mm square fan with 15 mm thickness and 5 V PWM control

  • 40 mm square frame fits tight server bays
  • 15 mm slim depth clears low-profile chassis
  • 5 V PWM 4-pin gives precise speed control
  • 12 A draw keeps power budget low

40×40×15 mm 5 V PWM case fan

The ASB0405LB is a 40 mm square cooling fan that runs on 5 V DC and draws 0.12 A. A four-pin PWM connector allows speed control through the motherboard or fan controller. It is designed for tight spaces in servers, small-form-factor PCs or embedded chassis where a 15 mm thick frame fits.

Ideal for compact builds with 5 V headers

This fan suits builders who need a low-profile 40 mm cooler with PWM control on a 5 V rail. It will not work for systems that require 12 V fans, larger frame sizes, higher airflow ratings or three-pin voltage control only.

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 sleeve bearing need lubrication or replacement during the fan's life?

The ASB0405LB uses a sleeve bearing that cannot be relubricated; expect replacement when noise or vibration increases.

What thermal limit appears first when the fan runs continuously at 5 V and 0.12 A?

Continuous operation at the rated 5 V and 0.12 A typically hits the sleeve-bearing temperature limit before the motor winding limit.

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