OEM Industries C4020X12BPCP0c-5 40mm fan 12V 0.168A 2-wire

Compact 40mm DC Fan

This 40 mm square DC fan is designed for tight chassis spaces where a low-profile cooling solution is required. It operates on a 12 V supply drawing 0.168 A through a simple two-wire connection. The unit is a fan-only component without integrated LED lighting. It suits builders assembling small form factor systems or replacing a specific 4020 model cooler.

Airflow Capacity and Limits

The compact frame delivers airflow proportional to its 40 mm dimensions and 12 V 0.168 A power rating, handling modest thermal loads in confined areas. It runs out of capacity when cooling high-wattage processors or densely packed components that demand greater static pressure. The two-wire design provides no speed feedback or PWM control, so airflow remains constant rather than scaling with temperature.

Two-Wire Interface Constraints

The 2-wire power interface supplies voltage and ground only, lacking a tachometer or PWM signal line. This prevents the motherboard from monitoring fan speed or adjusting duty cycle automatically. The fan will spin at full rated speed whenever 12 V is present, which limits acoustic optimisation and prevents low-speed idle operation. Builders needing variable control must add an external voltage regulator.