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Synology Fan 120120251 120mm Replacement System Fan for 8-12 Bay NAS Series

Synology Fan 120120251 120mm Replacement System Fan for 8-12 Bay NAS Series

This genuine Synology replacement fan provides essential thermal regulation for high-capacity NAS units, preventing hardware overheating and ensuring system stability. It is specifically engineered to maintain the precise airflow requirements of 8-bay to 12-bay DiskStation and Expansion models.


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Description

The Synology Fan 120120251 is a high-performance 120mm cooling component designed to maintain the structural integrity and operational longevity of enterprise-grade NAS systems. Measuring exactly 12.0 x 12.0 x 2.5 cm, this system fan is the official OEM replacement part for Synology's 8-12 bay series. It is engineered to deliver the specific static pressure required to move air through dense drive arrays, ensuring that internal hard drives and processors remain within safe operating temperature ranges even during heavy data parity checks or multi-user access.


This product is for:
- IT Administrators managing DS3612xs or DS3611xs units who require exact-match components to maintain server uptime and manufacturer specifications.
- Home Lab enthusiasts using DS1815+ or DS1813+ models who want to resolve fan failure warnings without compromising the unit's acoustic profile.
- Creative professionals utilizing DS2413+ storage for high-resolution video editing who need reliable 24/7 cooling for their data sets.
- Maintenance technicians servicing DX1211 expansion units to ensure consistent cooling across scaled storage environments.
- Small business owners looking for a plug-and-play cooling solution for DS2015xs or DS1812+ systems that integrates perfectly with DSM software.

Detailed specifications:
- Brand: Synology
- Model Number: Fan 120120251
- Dimensions: 120mm x 120mm x 25mm
- Weight: 0.16 kg
- EAN: 4711174729524
- UPC: 846504009527
- Compatibility: DS2413, DS3612xs, DS2411, DS1812, DS3611xs, DS1813, DX1211, DS2015xs, DS1815
- Category: System Fan for 8-12 Bay Series

Installing the Fan 120120251 restores the factory-standard cooling efficiency of your Synology hardware. Because this is an authentic part, the connector is fully compatible with the proprietary headers found on Synology motherboards, allowing the DiskStation Manager (DSM) to accurately monitor RPM speeds. This prevents the common "Fan Stopped" false positives often triggered by third-party fans with different voltage curves. The build quality ensures low vibration, which is critical in multi-bay NAS environments where excessive vibration can lead to premature hard drive failure or increased seek errors.

Compared to generic 120mm case fans, the Synology Fan 120120251 is specifically calibrated for the airflow resistance of DiskStation chassis. While aftermarket fans may prioritize high RPM or RGB lighting, they often fail to communicate correctly with Synology’s thermal control logic, leading to persistent system beeps or emergency shutdowns. This official replacement ensures the balance between noise reduction and thermal performance is maintained exactly as the engineers intended, providing a seamless fit that generic fans cannot guarantee.

Q&A:
- How do I know if my Synology NAS fan needs to be replaced? If your DSM dashboard displays a "Fan Stopped" alert or if you hear unusual clicking or grinding noises from the rear of the unit, a replacement is necessary.
- Is this fan compatible with the DS1817+ or DS1819+? This model is specifically validated for the DS1812, DS1813, and DS1815; users should verify their specific hardware manual for newer model compatibility.
- Does this replacement fan include mounting screws? This product is the fan unit itself; it is recommended to retain and reuse the original mounting screws from your existing NAS chassis.
- Will using this fan void my Synology warranty? No, using official Synology replacement parts like the Fan 120120251 is the recommended method for maintaining your device without affecting warranty status.
- Can I install this fan while the NAS is running? It is highly recommended to power down the NAS and disconnect the power source before performing any internal hardware maintenance to prevent electrical damage.
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