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About Sound Levels
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 | |
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 | 000000 |
| 2.36" (60 mm) | 2.36" (60 mm) | 0.98" (25 mm) | 20 | Ball | 5° to 145° | 30 | 0.12 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |