OEM Industries AD0405HB-G70 40mm CPU cooler

Compact 40 mm cooling fan

The OEM Industries AD0405HB-G70 is a 40 mm square fan designed for tight spaces such as small-form-factor PCs or embedded boards. It runs on 5 V DC and draws 0.19 A, making it suitable for low-power headers or external adapters. The two-wire lead keeps wiring simple for system integrators and hobbyists alike. Ball-bearing construction supports continuous operation in always-on devices.

Thermals noise and power draw

At 6000 RPM the fan moves air through a 10 mm thick frame while consuming only 0.96 W. Ball bearings keep acoustic output steady over time without the rattle that can develop in sleeve designs. The 5 V supply rail limits total system power impact even when multiple units are daisy-chained. No LED lighting means zero light bleed in dark chassis builds.

Upgrade path and fit

This unit replaces worn or noisy 4010 fans in industrial switches, router appliances and compact CPU coolers where a 40 mm footprint is fixed. The jump is worth it when the original fan has failed or when ball-bearing longevity is preferred over sleeve alternatives. Builders who need PWM speed control or a three-wire tachometer signal should look elsewhere as this model provides only two wires. Buyers who want larger airflow or quieter operation at lower RPM will need a bigger frame size.