About Sound Levels
To choose an alarm or speaker that’s loud enough, first determine the decibel (dB) rating of background noise.
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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 sleeve bearings are good for less demanding applications, such as cooling prototypes or parts that aren’t used often.
For technical drawings and 3-D models, click on a part number.
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 | ||||||||||||||
| 1.97" (50 mm) | 1.97" (50 mm) | 0.39" (10 mm) | 13 | Sleeve | 15° to 155° | 31 | 0.18 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
12V DC—Wire Leads | ||||||||||||||
| 2.36" (60 mm) | 2.36" (60 mm) | 0.98" (25 mm) | 16 | Sleeve | 15° to 155° | 17 | 0.05 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 2.36" (60 mm) | 2.36" (60 mm) | 0.98" (25 mm) | 27 | Sleeve | 15° to 155° | 32 | 0.15 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 2.76" (70 mm) | 2.76" (70 mm) | 0.59" (15 mm) | 19 | Sleeve | 15° to 155° | 22 | 0.10 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 3.15" (80 mm) | 3.15" (80 mm) | 0.98" (25 mm) | 23 | Sleeve | 15° to 155° | 21 | 0.05 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 3.62" (92 mm) | 3.62" (92 mm) | 0.98" (25 mm) | 28 | Sleeve | 15° to 155° | 18 | 0.05 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 3.62" (92 mm) | 3.62" (92 mm) | 0.98" (25 mm) | 50 | Sleeve | 15° to 155° | 35 | 0.30 | Plastic | Plastic | No | 0.177" (4.5 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 4.72" (120 mm) | 4.72" (120 mm) | 0.98" (25 mm) | 104.4 | Sleeve | 15° to 155° | 45 | 0.56 | Plastic | Plastic | No | 0.177" (4.5 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
24V DC—Wire Leads | ||||||||||||||
| 2.36" (60 mm) | 2.36" (60 mm) | 0.79" (20 mm) | 16 | Sleeve | 15° to 155° | 21 | 0.03 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 2.36" (60 mm) | 2.36" (60 mm) | 0.98" (25 mm) | 27 | Sleeve | 15° to 155° | 32 | 0.10 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 0000 |
| 3.15" (80 mm) | 3.15" (80 mm) | 0.79" (20 mm) | 29 | Sleeve | 15° to 155° | 30 | 0.05 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 4.72" (120 mm) | 4.72" (120 mm) | 0.98" (25 mm) | 108 | Sleeve | 15° to 155° | 45 | 0.24 | Plastic | Plastic | No | 0.17" (4.3 mm) | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |