Delta 4020 EFB0412MD Fan DC12V 0.10A 3pin. model No: EFB0412MD. size:40 40 20MM. ADDA AVC DELTA FOXCOON JMC DATECH MAGIC NIDEC NMB PANAFIO. 25 25 MM 35 35 MM 40 40 MM 50 50 MM 60 60 MM 70 70 MM 80 80 MM 90 90 MM.
I replaced a Delta fan in the power supply of an NVR security system in my living room that was too loud with a whine noise that I could hear 25' from it. This Delta fan was a little quieter but still had a noticeable whine that I could hear 25' away, therefore making it still unacceptable. I then bought a Sunon fan that is even quieter. I can still hear that fan about 15' away but it's acceptable. It doesn't have that whine to it. Both replacement fans I tried run at a lower rpm and moves less air than the original fan but they still provided adequate air flow.