SunnyStar Co., Ltd SHBC0412SH 40x10mm 12V 0.11A 2-pin case fan

Compact 40 mm 12 V case fan

The SunnyStar SHBC0412SH is a 40 mm square case fan designed for tight spaces such as small-form-factor PCs, routers or network switches. It runs on a 12 V supply and draws 0.11 A through a two-pin power connector. The sleeve bearing keeps the acoustic profile low for noise-sensitive builds.

Sleeve bearing limits at low RPM

The sleeve bearing and sub-1600 RPM ceiling mean airflow is modest and suited to spot cooling rather than high-static-pressure radiators. Noise stays between 15 and 20 dBA, but the bearing type can develop wear faster than ball or fluid-dynamic alternatives if the fan is mounted horizontally or run continuously at elevated temperatures.

Verify voltage, connector and clearance

Confirm the target device supplies 12 V on a two-pin header; the fan has no PWM lead for speed control. Measure the mounting holes — 40 mm centre-to-centre — and ensure 10 mm depth fits inside the chassis or router enclosure. The black frame carries no LEDs, so it suits stealthy or industrial aesthetics.