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Small square 4 cm case fan with black frame and transparent blades

SXDOOL

SXDOOL 4020 12V 0.08A 1608KL-04W-B20 case fan

SKU CH-2K05-Q5Z62

A 4 cm case fan running at 12 V and 0.08 A with a two-wire mute design

  • Original NMB build quality ensures reliable cooling
  • 40 mm compact size fits tight chassis spaces
  • 12 V 0.08 A draws minimal power
  • Two-wire design simplifies installation
  • Mute operation keeps systems quiet

Compact 40 mm case fan

The SXDOOL 4020 is a 40 mm two-wire fan built for tight spaces in PC cases, laptops, servers, power supplies and communication equipment. It runs on 12 V and draws 0.08 A, making it suitable for low-power cooling tasks where a small footprint is required.

Quiet low-power operation

Rated at 12 V and 0.08 A, the fan keeps power draw minimal while the NMB motor design aims for muted acoustics during normal use. The two-wire connection provides simple voltage control without PWM complexity, helping maintain steady airflow in confined enclosures.

Ready to install with no extras

The unit ships as a bare fan without mounting screws, cables or software utilities. Builders must supply their own fixings and connect the two-wire lead directly to a 12 V header or adapter, so plan the mounting method before fitting it into the target chassis.

How it compares

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

Price $9.99
Cheaper than about 91% 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

How do I install the two-wire 12V 0.08A fan in a 4020 mounting pattern?

Align the 40 mm square frame with the case screw holes, connect the two-wire lead to a 12 V header, and secure with four screws; the step often missed is checking airflow direction arrows before tightening.

What maintenance will the 1608KL-04W-B20 bearing need over time?

The sleeve bearing runs maintenance-free until audible noise appears; then replace the entire 4020 unit as the bearing is not user-serviceable.

At what point does the 0.08 A current limit throttle sustained airflow?

Continuous 12 V operation stays within the 0.08 A rating; the first limit is thermal — if case ambient exceeds design range the fan slows to protect the motor.

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