1.57" Fans | McMaster-Carr

Measured in decibels (dB), volume ratings indicate how much noise equipment makes. Some common volume levels include a whisper @ 20 dB, a refrigerator @ 40 dB, a conversation @ 60 dB, and a light machine shop @ 90 dB. OSHA recommends hearing protection for exposure to 80 dB and greater.

DC Equipment-Cooling Fans

Running on 48V DC power or lower, these compact fans fit inside electronics and other small, heat-sensitive equipment to keep things cool. They're also known as muffin fans. Some meet American and Canadian safety standards.

Fans with ball bearings generate less heat as they run, so they have a longer life than fans with sleeve bearings.

For technical drawings and 3-D models, click on a part number.

Square

Overall
Ht.	Wd.	Dp.	Airflow, cfm	Bearing Type	Temp. Range, °F	Volume, dBA	Current, A	Frame Material	Blade Material	Mounting Fasteners Included	Mounting Hole DIa.	Specifications Met		Each
5V DC—Wire Leads
1.57" (40 mm)	1.57" (40 mm)	0.79" (20 mm)	8.7	Ball	0° to 145°	32.1	0.23	Plastic	Plastic	No	0.17" (4.3 mm)	UL Recognized Component, C-UL Recognized Component	0000000	000000
12V DC—Wire Leads
1.57" (40 mm)	1.57" (40 mm)	0.39" (10 mm)	3	Ball	0° to 165°	16	0.05	Plastic	Plastic	No	0.14" (3.6 mm)	UL Recognized Component, CSA Certified	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.39" (10 mm)	7	Ball	15° to 155°	28	0.13	Plastic	Plastic	No	0.15" (3.8 mm)	UL Recognized Component, C-UL Recognized Component	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.79" (20 mm)	5	Ball	15° to 155°	23	0.09	Plastic	Plastic	No	0.15" (3.8 mm)	UL Recognized Component, C-UL Recognized Component	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.79" (20 mm)	7	Ball	0° to 140°	29	0.13	Plastic	Plastic	No	0.17" (4.3 mm)	UL Recognized Component, CSA Certified	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.98" (25 mm)	11	Ball	0° to 155°	39	0.20	Plastic	Plastic	No	0.14" (3.5 mm)	UL Recognized Component, CSA Certified, C-UL Recognized Component	00000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.98" (25 mm)	14	Ball	0° to 140°	46	0.27	Plastic	Plastic	No	0.14" (3.5 mm)	UL Recognized Component, CSA Certified, C-UL Recognized Component	00000000	00000
1.57" (40 mm)	1.57" (40 mm)	1.11" (28 mm)	22	Ball	0° to 155°	54	0.56	Plastic	Plastic	No	0.15" (3.7 mm)	UL Recognized Component, CSA Certified, C-UL Recognized Component	00000000	00000
24V DC—Wire Leads
1.57" (40 mm)	1.57" (40 mm)	0.39" (10 mm)	5	Ball	5° to 145°	31	0.06	Plastic	Plastic	No	0.17" (4.3 mm)	UL Recognized Component, C-UL Recognized Component	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.79" (20 mm)	5	Ball	15° to 155°	23	0.07	Plastic	Plastic	No	0.15" (3.8 mm)	UL Recognized Component, C-UL Recognized Component	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.79" (20 mm)	7	Ball	0° to 140°	29	0.07	Plastic	Plastic	No	0.17" (4.3 mm)	UL Recognized Component, CSA Certified	0000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.98" (25 mm)	11	Ball	0° to 155°	39	0.10	Plastic	Plastic	No	0.14" (3.5 mm)	UL Recognized Component, CSA Certified, C-UL Recognized Component	00000000	00000
1.57" (40 mm)	1.57" (40 mm)	0.98" (25 mm)	14	Ball	0° to 140°	46	0.15	Plastic	Plastic	No	0.14" (3.5 mm)	UL Recognized Component, CSA Certified, C-UL Recognized Component	00000000	00000
1.57" (40 mm)	1.57" (40 mm)	1.11" (28 mm)	22	Ball	0° to 145°	54	0.29	Plastic	Plastic	No	0.15" (3.7 mm)	UL Recognized Component, CSA Certified, C-UL Recognized Component	00000000	00000