Delta 4028 fan PFB0412EN-E

PFB0412EN-E by Delta Electronics

40mm x 40mm x 28mm frame
38cfm at 0 pressure
7.43in H2O at 0 cfm

Estimated MTTF is over 55000h at 85c, 70000h at 40c

12v max 3.5A, run current is 2.6A

31.2W, Max 42W

32500 max rpm

4 wires:
Black: Negative
Red: Positive
Blue: PWM
Yellow: RPM signal

May not come terminated.
April 2022 batch are terminated in a 4 pin connector.