AVC BAZC0925R2U P006 12V 0.9A 4-wire PWM all-in-one turbine cooling fan

AVC · Turbine Blower · BAZC0925R2U · PWM 4-Wire

What Is the AVC BAZC0925R2U Turbine Cooling Fan?

The AVC BAZC0925R2U P006 is a DC 12V all-in-one turbine (centrifugal) cooling fan with 4-wire PWM speed control, drawing 0.9A. Unlike axial fans, this blower-style fan draws air in axially and expels it radially at 90 degrees — ideal for applications requiring focused airflow through narrow ducts, across dense heatsinks, or in compact electronic devices where space constrains airflow paths.

In short: An AVC 12V centrifugal blower with 4-wire PWM speed control — delivers high-pressure focused airflow for confined-space electronics cooling with programmable fan speed.

Key Features

1. 4-Wire PWM Speed Control

What it means: Full PWM (Pulse Width Modulation) control via standard 4-pin fan header — power, ground, tachometer, and PWM signal.
Why it matters: Allows the host system to vary fan speed dynamically based on temperature — quiet at idle, full speed under load.
Result: Optimized balance of cooling performance and acoustic noise for each operating condition.

2. Turbine/Centrifugal Airflow

What it means: Air exits at 90 degrees to the intake — a "blower" rather than an axial "fan."
Why it matters: Delivers air at higher static pressure for pushing through restrictive heatsinks, filters, and narrow ducts.
Result: Effective cooling in tight spaces where axial fan airflow would stall from back pressure.

3. All-in-One Integrated Design

What it means: Motor, impeller, housing, and control electronics in a single self-contained module.
Why it matters: No need to design a scroll housing or mounting bracket — the unit drops into the equipment as-is.
Result: Reduced mechanical engineering and assembly time for OEM equipment designers.

Key Specifications

Typical Applications

• Laptop and Notebook Cooling: Providing focused component-level cooling in thin-and-light computing devices with constrained internal airflow.
• Graphics Card Blowers: Exhausting hot air directly out the rear bracket of discrete GPUs in workstations and gaming PCs.
• Embedded Systems: Cooling processors and FPGAs in compact industrial embedded controllers and digital signage players.
• Telecom Line Cards: Ventilating individual line cards in modular telecom and networking chassis.

Frequently Asked Questions

"How do I control the fan speed via PWM?"

The 4-pin connector uses the standard Intel PWM fan specification: Pin 1 (black) = Ground, Pin 2 (yellow) = 12V Power, Pin 3 (green) = Tachometer (2 pulses per revolution), Pin 4 (blue) = PWM input (25kHz, 0-100% duty cycle). A 0% PWM duty cycle runs the fan at minimum speed; 100% runs at maximum. The PWM signal is 5V logic level, open-drain.

"What happens if I connect only the power pins without PWM?"

Most 4-wire PWM fans will run at full speed when the PWM pin is left floating or unconnected. For fixed-speed operation, connecting only Power and Ground (pins 1 and 2) is acceptable — the fan will default to maximum speed. The tachometer output (pin 3) can optionally be monitored for RPM.

"What is the difference between this blower and a standard axial fan?"

Axial fans move air parallel to the axis of rotation — best for open-ventilation high-flow applications. Centrifugal blowers like this one redirect airflow 90 degrees and generate higher static pressure — best for pushing air through restricted paths such as heatsinks, filters, and narrow ducting where an axial fan would lose most of its flow.

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