SXDOOL Delta Sensflow WFC1212B 12025 12cm case fan

120 mm temperature-controlled case fan

The Delta Sensflow WFC1212B is a 120 mm chassis fan built for systems that need quiet, variable-speed airflow. Its double-ball bearing and seven-blade impeller spin between 1245 and 2447 RPM depending on thermistor input. The two-pin connector draws 0.44 A at 12 V, making it a direct drop-in for standard motherboard headers or fan controllers. Builders who prefer PWM or three-pin speed reporting will need a different model.

Fits 120 mm mounts with 20 cm lead

The 12025 frame matches common 120 mm mounting holes in cases, radiators and heatsinks. A 20 cm two-wire tail reaches nearby headers without extensions. Because speed is governed by an external thermistor circuit, the fan frees the builder from fixed-voltage operation while keeping cabling simple. No LED lighting means the unit stays invisible in windowed builds that favour a dark interior.

Replaces fixed-speed 120 mm two-pin fans

Swapping a constant-RPM two-pin fan for this temperature-controlled unit cuts idle noise from 38 dBA down to 18 dBA while still delivering up to 44.62 CFM under load. The jump is worth it when a system runs quiet at the desktop but must ramp airflow during sustained workloads. Buyers who need PWM signalling, RGB illumination or a longer cable should look elsewhere.