This fan has been wired correctly to match Routers listed below.
*Replacement fan for Routers & Switches 891 1811 1803 2811 7301 2950.
Sunon 40x40x20mm Fan is an incredibly high output 40mm fan. Great for video heatsink and mainboard chipsets. (and Routers)

PRODUCT SPECIFICATIONS:
Fan Dimension: 40x40x20mm
Bearing Style: Maglev VAPO bearing
Air Flow: 10.2 CFM
Fan Speed: 8,200 RPM
Power Input: 12V DC
MTBF: 50,000 Hrs
Tail: 12 inches
Connector Choice: 3 wire 3 pin
Model No.: KDE1204PKVX or MB40201VX-000U

CERTIFICATIONS:
UL Recognized