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Square black 140mm case fan with thick 38mm frame and four mounting holes

BGears

BGears b-Blaster 140x38 140mm 38mm 5200 RPM 308 CFM case fan

SKU CH-KPJ5-R2024 MPN b-Blaster 140x38

A 140 mm thick case fan spins at 5200 RPM to push 308 CFM through radiators or heatsinks at 70 dBA

  • Fan size140 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth38 mm
  • Bearing design2 Ball
  • Rotational speed5,200 RPM
  • High airflow of 308 CFM cools demanding components
  • 5200 RPM speed delivers extreme cooling performance
  • Dual ball bearing design extends operational lifespan
  • 38 mm thick frame fits specialised mounting locations
  • PWM 4-pin control enables precise speed management

High-Speed 140mm Case Fan

The BGears b-Blaster 140x38 is a 140mm case fan built for systems that demand maximum airflow. It suits builders fitting high-performance PCs, power-supply replacements or CPU heatsinks where static pressure matters. The 38mm thickness requires a mounting location with extra clearance.

308 CFM at 5200 RPM

Dual ball bearings support the 5200 RPM operating speed that delivers 308 CFM of airflow. That volume clears heat quickly from dense radiator stacks or restricted chassis layouts. The trade-off is a 70 dBA noise level at full speed, so the fan is best used where cooling performance outweighs acoustic comfort.

4-Pin PWM Control

A 4-pin PWM connector lets the motherboard or fan controller vary speed automatically based on temperature. This provides headroom to reduce noise under light loads while retaining the 5200 RPM ceiling for heavy workloads. Four mounting screws are included for installation.

How it compares

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

Price $22.99
Pricier than about 58% of the 8,339 comparable items (median $19.99).
Fan size 140 mm
Higher than about 80% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameBgears
Product lineb-blaster Series
Model nameb-Blaster 140 × 38
Product typeCase Fan
Product colorBlack
Performance
Rotational speed5,200 RPM
Airflow rate308 CFM
Size & build
Fan size140 mm
Number of fans1 Fan
Fan depth38 mm
Bearing design2 Ball
Product dimensions140 × 140 × 38 mm
Shipping weight0.48 kg
Package size171 × 152 × 44 mm
Compatibility
Compatible withCase
Environment & compliance
Operating noise70 dBA
More details
Fan controlNo Controller

Questions about this item

Will the 38 mm thickness and 140 mm frame fit my existing 140 mm mounting holes without blocking nearby components?

The frame measures 140.00 x 140.00 x 38.00 mm, so it uses standard 140 mm screw spacing but is 38 mm thick — verify clearance against your side panel, radiator or cable routing before installing.

How can I confirm the fan is running at its rated 5200 RPM once installed?

Connect the 4-pin PWM header to your motherboard or fan controller, then monitor the reported speed in BIOS or a hardware-monitoring utility; it should read close to 5200 RPM at full duty cycle.

Does the package include mounting screws or do I need to source them separately?

Four screws are included in the box, so no separate fastener purchase is required for a standard case installation.

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