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Black 140mm square case fan 38mm thick non-LED four-pin PWM

BGears

BGears b-BlasterPWM 140x38 140mm 38mm case fan

SKU CH-MTAG-1EECZ MPN b-BlasterPWM 140x38

A 140 mm case fan with a 38 mm frame, PWM control, Japanese dual-ball bearings and a 1200–6500 RPM range delivering up to 398 CFM airflow

  • Fan size140 mm
  • Number of fans1 Fan
  • Fan controlNo Controller
  • Fan depth38 mm
  • Bearing design2 Ball (Japanese ball bearing)
  • Rotational speed1200 to 6,500 RPM +/- 10%
  • PWM control delivers precise on-demand cooling from 1200 to 6500 RPM
  • Japanese 2-ball bearing ensures stability at high speed and extended lifespan
  • Massive airflow up to 398 CFM meets demanding thermal loads
  • 38 mm thick 140 mm frame fits high-static-pressure builds
  • 70000-hour MTBF rated for long-term reliability

High-speed 140 mm case fan

The BGears b-BlasterPWM 140x38 is a single 140 mm case fan built for systems that need a wide speed range. Its 1200 to 6500 RPM span lets the PWM curve match cooling demand precisely. Japanese dual-ball bearings support the high rotational speeds. The unit suits builders who want strong airflow without LED lighting.

Sustained-load airflow and pressure

At the top of its range the fan moves up to 398 CFM and develops 37.03 mmH2O static pressure. The 38 mm thickness helps maintain that pressure through restrictive radiators or dense mesh. Noise reaches 67.8 dBA at maximum speed, so the curve should be tuned for the workload. MTBF is rated at 70000 hours for continuous operation.

38 mm thickness constraint

The 38 mm frame depth decides whether the fan fits your chassis or radiator stack. Standard 25 mm mounts will not accept it. Buyers with slim cases or tight clearance above the motherboard should verify spacing before ordering. The four-pin mini connector provides standard PWM control.

How it compares

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

Price $27.99
Pricier than about 70% 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
Model nameBG30101
Product typeCase Fan
Product colorBlack
Performance
Rotational speed1200 to 6,500 RPM +/- 10%
Airflow rate51.5 CFM min / 398 CFM max
Air pressure rating1.26mmH2O (at zero flow for pwm) / 37.03mmH2O (max for pwm)
Power
Power input connectorMini 4 pin 4 wires
Size & build
Fan size140 mm
Number of fans1 Fan
Fan depth38 mm
Bearing design2 Ball (Japanese ball bearing)
Product dimensions140 × 140 × 38 mm
Shipping weight0.45 kg
Package size150 × 150 × 40 mm
Environment & compliance
Operating noise67.8 Max
More details
Fan controlNo Controller
Mean time between failures70,000 h
LED lightingNon-LED

Questions about this item

How loud is the BGears b-BlasterPWM 140x38 when running continuously at its 6500 RPM maximum?

The fan reaches a maximum noise level of 67.8 dBA at 6500 RPM, while PWM control lets it drop to 1200 RPM for much quieter operation during lighter loads.

Does this 140 mm PWM fan need a separate controller or can it plug straight into a motherboard header?

It connects via a standard 4-pin PWM header and includes its own PWM speed control function, so no external fan controller is required.

Will the 38 mm thickness fit alongside standard 25 mm fans in a push-pull radiator setup?

At 38 mm thick the fan is significantly deeper than typical 25 mm models, so you must verify case and radiator clearance before mixing thicknesses.

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