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Small square black 50 mm case fan, 10 mm thick, no LED

Blacknoise

Blacknoise Noiseblocker NB-BlackSilent XS-1 50mm x 10mm case fan

SKU CH-Y61R-RM897

A 50 mm case fan running at 3000 rpm delivers 6.7 CFM airflow at 16 dBA

  • Fan Size50mm
  • Bearing Type1 Ball, 1 Sleeve
  • ColorBlack
  • LEDNo
  • Ultra-quiet operation at 16 dBA for silent builds
  • 3000 rpm speed delivers 6.77 CFM focused airflow
  • Compact 50 mm by 10 mm frame fits tight spaces
  • Hybrid ball-and-sleeve bearing for long-term reliability
  • Vibration-free mounting with included NB-slics and screws

Compact 50 mm case fan

The Noiseblocker NB-BlackSilent XS-1 is a 50 mm square frame fan just 10 mm thick, designed for tight spaces in small-form-factor builds or as a targeted spot-cooling upgrade. Its three-pin connector fits standard motherboard headers for straightforward speed reporting and voltage control.

Hybrid bearing and vibration isolation

A combined ball-and-sleeve bearing pairs with the manufacturer’s NB-NanoSLI 2 magnetic bearing and NB-EKA P2 drive to keep acoustic output at 16 dBA while spinning at 3000 rpm. The reinforced fibreglass PBT frame and included NB-slics dampen vibration, and the 50 cm textile-sheathed cable eases routing in cramped chassis.

Limits of the 50 mm form factor

At 6.77 CFM the airflow suits component-level cooling — voltage-regulator heatsinks, M.2 slots or tight GPU clearances — but cannot replace larger case intake or exhaust fans. The three-pin interface lacks PWM precision, so speed scales with voltage rather than a dedicated control signal.

Highlights

  • Ultra-quiet operation at 16 dBA for silent builds
  • 3000 rpm speed delivers 6.77 CFM focused airflow
  • Compact 50 mm by 10 mm frame fits tight spaces
  • Hybrid ball-and-sleeve bearing for long-term reliability
  • Vibration-free mounting with included NB-slics and screws

Specifications

Fan Size50mm
Bearing Type1 Ball, 1 Sleeve
ColorBlack
LEDNo

Questions about this item

What does the 3-pin connector limit for this 50 mm fan?

The 3-pin connector supplies power and a tachometer signal but no PWM line, so speed is controlled by varying voltage rather than a digital duty cycle.

What physical space and hardware are required to mount the NB-BlackSilent XS-1?

It needs a 50 mm × 50 mm mounting hole pattern and 10 mm of depth; four screws are included and NB-slics allow vibration-free, tool-free fitting.

How is the fan installed and which step is often missed?

Slide the supplied NB-slics into the frame corners, align the fan with the case holes, then secure with the four included screws; the step users skip is fitting the silicone grommets before tightening.

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