Technical Specifications

Key Features

Applications

• Compatible Western Digital My Cloud EX4100 NAS cooling systems
• Network-attached storage equipment ventilation
• Small server and data storage enclosure cooling
• Embedded computer equipment thermal management
• Telecommunications equipment forced-air ventilation
• Industrial electronics control enclosure cooling
• Equipment requiring PWM-controlled 120 mm cooling fans
• Replacement of compatible SUNON MFC0251V3-Q01U-S99 four-wire axial fans

Purchase Information

We support online purchase of the SUNON MFC0251V3-Q01U-S99 fan. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.

Frequently Asked Questions

What is SUNON MFC0251V3-Q01U-S99?
MFC0251V3-Q01U-S99 is a SUNON MagLev MFC-series DC axial cooling fan with a nominal 120 x 120 x 25 mm frame, 12 VDC supply and S99 control-function suffix.

What is the rated voltage of MFC0251V3-Q01U-S99?
Exact-model supplier listings specify 12 VDC. The related SUNON catalog model is also rated for 12 VDC, but the precise operating voltage range for the Q01U-S99 customer configuration was not independently verified.

What are the dimensions of MFC0251V3-Q01U-S99?
The nominal dimensions are 120 x 120 x 25 mm. SUNON's related MFC0251V3 series drawing specifies approximately 105 mm mounting-hole spacing with eight 4.3 mm mounting holes. Confirm the actual customer-specific fan assembly before installation.

What is the rated current?
The manufacturer lists 140 mA for the related MFC0251V3-0000-A99 model. Although 12 VDC and 1.68 W mathematically correspond to approximately 0.14 A, the exact Q01U-S99 current rating was not separately confirmed in a manufacturer datasheet.

What is the power consumption?
An exact-model specialist supplier and multiple replacement listings identify 1.68 W at 12 VDC. The same power rating appears in the SUNON catalog for the related MFC0251V3 standard version.

What is the rated fan speed?
An exact-model specialist supplier specifies 2200 RPM, consistent with the SUNON MFC0251V3 standard catalog performance. Some generic marketplace listings show a different speed range, so the fan label and configuration-specific technical specifications should be prioritized.

What airflow does MFC0251V3-Q01U-S99 provide?
The published exact-model airflow is approximately 127.4 m³/h, equivalent to 75 CFM. SUNON also specifies 75 CFM for the related MFC0251V3 standard catalog version.

What is the maximum static pressure?
The exact-model supplier lists approximately 39.8 Pa, equivalent to 0.16 inH2O. This agrees with the manufacturer's MFC0251V3 standard series specification.

What bearing system does MFC0251V3-Q01U-S99 use?
The V designation in the SUNON model numbering system identifies the Vapo bearing. The fan is part of SUNON's MagLev cooling fan range.

What is the acoustical noise level?
The published rating is 34 dB(A). Actual installed noise depends on the cooling enclosure, fan control settings, operating speed and airflow restrictions.

Does MFC0251V3-Q01U-S99 support PWM control and speed monitoring?
Yes. SUNON's model numbering guide defines S99 as automatic restart with an F-type frequency generator signal and PWM control. Replacement suppliers identify a four-wire, four-pin assembly. However, the exact PWM input levels, operating frequency, frequency generator signal characteristics and connector pin assignments for Q01U-S99 were not independently verified. Match the existing fan wiring before connection.

What should be checked before ordering MFC0251V3-Q01U-S99?
Confirm the complete SUNON model number including Q01U-S99, rated 12 VDC supply, 1.68 W power, 120 x 120 x 25 mm housing, mounting-hole geometry, Vapo bearing system, four-wire connector, PWM control input, F-type speed feedback output, wire order and required cooling performance. A Western Digital My Cloud EX4100 owner identified this exact fan model in the NAS, but compatibility should still be checked against the installed assembly. MFC0251V3-0000-A99 shares nominal cooling ratings but does not necessarily provide the same PWM and monitoring features. Similarly, MFC0251V1 and MFC0251V2 configurations have different speed, power and airflow ratings. Do not substitute another version without confirming mechanical and electrical compatibility.