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The Alphacool ES fans have been specially developed for use in servers and workstations and, unlike usual, do not offer a 2 or 3-pin DC power connection, but a 4-pin PWM control.
PWM control
Instead of the usual 2 cables or the 3-pin connector Alphacool now also uses a 4-pin PWM connector for enterprise fans, which is supported by more and more server mainboards. Via the 4-pin PWM connector, the fan always receives full voltage and is controlled by pulse width modulation. This allows the fan to be controlled over a much wider speed range. A considerable amount of energy can be saved whilst controlling the fans in server racks and with 0% PWM control, the fans can even be stopped completely. The fan also offers a soft start, which increases the service life of the fan and reduces the risk of injury. At speeds of several thousand revolutions per minute, no parts of the body should get between the fan blades.
Double ball bearings
Unlike classic plain bearing, Alphacool ES fans have a double ball bearing for increased service life under full load. Double ball bearings are generally regarded as the highest quality bearings in terms of durability and quality. This also ensures a high level of running smoothness in terms of minimal vibration.
Protection circuits
All Alphacool Enterprise fans have multiple protection circuits. If the fans are blocked, they automatically try to restart at reduced speed after a few seconds. Thanks to the soft start, including the emergency start function, the fan can be blocked for up to 72 hours without suffering damage. In case of wrong polarity when connecting the fan, a burn-out of the electronics for at least 5 seconds is impossible. If the fan is connected incorrectly for a short time, this is no problem.
The Alphacool ES fans for servers and workstations offer an extremely high air flow and an extremely high static pressure. They are therefore ideal for use on radiators or as particularly powerful case fans.
| Technical data | |
| Dimensions (L x W x H) | 80 x 80 x 25mm |
| Speed | 800-6000rpm |
| Bearing | Two ball bearing |
| Connection | 4-Pin PWM |
| Cable length | 30cm |
| Operation voltage | 7 - 14V |
| Start voltage min. | 7V |
| Power consumption | 0,66 - 0,85A (7,92 - 10,2W) |
| Static pressure | 14,29 mm H2O |
| Max. air flow | 130,83 m³/h |
| Noise | 50 dB(A) |
| MTBF | 70.000h |
| color | black |
| Security features | |
| Automatic Shutdown | Automatic switch-off if the fan is blocked |
| Automatic restarting | Restart attempt after 2-6 seconds if blocked |
| Damage due to blocking | It is guaranteed that the fan will not be damaged if it is blocked for up to 72 hour |
The (((Noiseblocker))) BlackSilent series is an inexpensive and reliable ultra silent fan series. The fans are developed in Germany and feature extremely quiet operation as well as high reliability.
Other than the most cheap fans the low noise levels remain for years of operation on their low level.
The reason is the choice of materials and precise manufacturing.
Other than 95% of the so called ''fan brands'' (((Noiseblocker))) develops the fans themselves and uses high quality parts even in their ''cheap'' fans. The BlackSilent fans are simple and solid fans with quality components that naturally have their price.
Different fom other competitors we give only realistic and serious technical data.
We leave it to the customer to judge claims such as ''400 000h MTBF'' (provided by multiple competitors). By the way: 400 000 hours are more than 45 years...
With the Rev. 3 of the BlackSilent series you purchase a reliable product optimized for silent operation.
From now on we include NB-Slics (vibration absorbers) with the 80&92mm retail fans as well as screws with the 120mm versions.
The further improved quality makes us confident that we can elongated the warranty period by one year to 3 years.
The fans are available in the sizes 80, 92 and 120mm.
There are 2 versions of each size: The version 1 is almost inaudible and intended for standard systems, the version 2 is almost not noticeable in operation and developed for more powerful systems.
Als Lager kommt unser besonders langlebiges NB-NanoSLI® Gleitlager zum Einsatz.
The failure rate was furthermore improved and is now 0,001% (before 0,15% of 100 000 units p.a.)
The MTBF could be raised to 80 000 realistically with the Rev. 3
Technical data:
Dimensions: 80x80x25mm
Weight: 80g
Nominal voltage: 12-13,2V
Starting voltage: <6V
Power consumption: 0,72W
Current: 0,1A (max)
Nominal speed: 1800rpm (+-10%)
Static pressure: 1,329mm H2O
Airflow: 45m3/h
Noise level: 16 dB/A
MTBF (25°): 80 000h
Connector: 3 Pin Molex with rpm signal
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