(2PCS) SDN Small Size 12v 1.5 INCH COOLING FAN SIZE 4020

Networking Devices (Routers and Switches)

​Heavy-duty network switches or routers that run 24/7 generate a lot of internal heat. A 4020 fan is used inside them to exhaust hot air so the device doesn’t hang or slow down your internet speed.

​CCTV DVR/NVR

​The box (DVR) that records CCTV footage contains a Hard Drive that gets very hot. To keep the hard drive cool and prevent data loss, a 40mm fan is often installed on the side of the casing.

​ Small Projectors

​Portable or LED projectors generate significant heat from the bulb and internal chips. Because the projector body is small, a 4020 fan fits perfectly to provide necessary cooling.

​ DIY Projects and Inverters

​In small home-made 12V inverters, battery chargers, or power supply units where space is tight, this fan is the best choice for cooling.

​Key Specifications to Remember:

• ​40mm: The length and width (roughly 1.5 inches).
• ​20mm: The thickness (A 20mm “thick” fan usually provides better air pressure than thinner models).
• ​12V: It operates on a standard 12-volt DC battery or adapter.