new 1 PCS Tianxuan Fan TX9225M12 DC 12V 0.20A 92*92*25mm 2 Pin cooling fan

KOEED · Cooling & Ventilation · DC Axial Fans · In stock

What Is the Tianxuan TX9225M12 Cooling Fan?

The Tianxuan TX9225M12 is a DC axial cooling fan measuring 92mm x 92mm x 25mm with a 2-pin power connector. It operates on 12V DC drawing 0.20 amps — roughly 2.4 watts — making it a low-power thermally-managed ventilation solution for enclosed electronics. The 92mm (sometimes referred to as "9225" form factor) is one of the most common fan sizes found in desktop computer power supplies, server rack cooling trays, 3D printer enclosures, CNC controller boxes, telecommunications equipment cabinets, and industrial inverter housings. Its 2-pin interface is the simplest possible — just positive and negative DC — with no tachometer feedback, no PWM speed control, and no need for BIOS-level fan management. Apply 12V, and it spins.

In short: If you have a piece of equipment with a dead 92mm 12V fan that uses a simple 2-wire connection, this TX9225M12 is a drop-in replacement — no PWM programming, no special connector, just plug in 12V and it cools. In stock at koeed.com.

When to Replace a Cooling Fan Rather Than Clean It

Fans accumulate dust, and dusty fans slow down and get loud. But there is a point where cleaning is no longer productive and replacement is the correct decision. Here is how to tell:

• The fan spins slowly even after thorough cleaning: Remove the fan, blow out the blades and motor housing with compressed air (hold the blades still — free-spinning a fan with compressed air can generate back-EMF that damages the driver circuit). Reinstall and check. If the RPM is still visibly lower than a new fan, the bearing has worn to the point where increased friction limits speed regardless of how clean the blades are.
• Audible grinding, clicking, or rattling at any speed: This is bearing damage — either the sleeve bearing surface is scored or the ball bearing (if equipped) has a spalled race. No amount of cleaning or lubrication fixes mechanical bearing damage. The fan must be replaced.
• The fan does not start reliably at 12V: Apply exactly 12V DC to the fan leads with a bench supply. If it needs a manual push to start, or it stutters before spinning, the internal Hall-effect sensor or driver IC is failing. These are non-serviceable epoxy-encapsulated components.
• Excessive vibration that changes with fan orientation: If the fan vibrates more when mounted horizontally than vertically, the bearing sleeve has developed asymmetric wear — a sign the lubricant has dried out and the shaft has been running metal-on-metal.

Installation Checklist for a 2-Pin Fan Swap

• Match the voltage: The TX9225M12 is strictly a 12V fan. Do not connect it to a 24V rail — even if it spins initially, the driver IC will overheat and fail within minutes. If your equipment uses 5V or 24V fans, this is not the correct replacement.
• Verify airflow direction: Most equipment pulls air through the enclosure from front to back. The fan frame has an arrow indicating both rotation direction and airflow direction. Mount the fan so airflow matches your equipment's intended cooling path.
• Check the connector type: The TX9225M12 uses bare wire leads for a 2-pin connection. If your original fan used a Molex, JST, or proprietary connector, you may need to splice wires or swap the connector housing from the old fan. Solder and heat-shrink connections are preferred over crimp connectors in vibration-prone environments.
• Finger guard if accessible: If this fan mounts where hands or cables could contact the spinning blades, install a wire finger guard. A 92mm guard costs very little and prevents both injury and cable damage.

Key Specifications

Airflow in CFM and static pressure in mmH2O vary with fan speed and are typically printed on the fan label. Noise level is a function of RPM and blade design. For detailed curves, check the manufacturer datasheet or measure with your own instrumentation.

Frequently Asked Questions

"My old fan had three wires — red, black, and yellow. Will this two-wire fan still work?"

The third wire (usually yellow) is a tachometer signal — an open-collector pulse output that reports fan RPM to the motherboard or controller for monitoring purposes. It is not required for the fan to spin. If your equipment only uses the tachometer to display fan speed or log it for maintenance alerts, the 2-wire fan will cool perfectly well but the speed monitoring feature will show zero RPM — which may trigger a "fan failure" warning on some systems. If your equipment actively uses the tachometer signal to enable operation (some servers and medical devices refuse to power on without a valid tach signal), a 2-wire fan will not work. Check your equipment manual to determine whether the tach signal is informational or mission-critical.

"This fan says 0.20A. Can I power it from a standard motherboard fan header?"

Yes. A standard PC motherboard fan header is typically rated for 1.0 amp at 12V. At 0.20A, this fan draws well within that limit and will not overload the header. However, if you are connecting this to an industrial PLC output, motor drive auxiliary supply, or any non-PC power source, confirm that the supply can deliver at least 0.5A at 12V with headroom — fans draw a brief inrush current when starting that can be 2-3x the running current. A supply rated for exactly 0.2A may trip its overcurrent protection when the fan first starts.

"How long will a sleeve-bearing fan last running 24/7?"

A sleeve-bearing fan like most 9225-size DC fans typically has a rated lifespan of 30,000 to 50,000 hours at 40 degrees C ambient — roughly 3.5 to 5.7 years of continuous operation. However, this rating drops significantly at higher temperatures. At 60 degrees C, the same bearing may last only 15,000-20,000 hours. If your application runs the fan in a hot enclosure (inverter cabinet, outdoor telecom box, factory floor), expect to replace it proactively every 2-3 years as preventive maintenance. The most common failure indicator is a gradual speed decrease over months as bearing lubricant degrades, eventually reaching a point where the fan can no longer overcome the system's static pressure and airflow drops to zero even though the fan is still spinning.

koeed.com supplies DC and AC cooling fans for electronics thermal management — including 40mm to 200mm axial fans, blowers, and cross-flow fans — to IT infrastructure teams, industrial panel builders, and electronics repair workshops worldwide. For bulk fan orders or cross-reference assistance, email Moritta@KOEED.COM.