PFB1248UHE Delta 48V 252.85 CFM DC Axial Fan

The Delta PFB1248UHE is a high-performance 48V DC axial fan designed for servers, telecom systems, power equipment and industrial electronics with demanding cooling requirements. Its 120 × 120 × 38mm frame corresponds to the widely used 12038 fan format.

Operating at 5500 RPM, the PFB1248UHE delivers 252.85 CFM airflow and maximum static pressure of 1.412 inchH2O. This combination allows the fan to move air through dense heat sinks, filters, server chassis and other airflow paths with significant resistance.

The fan uses ball bearings and has a rated service life of 70,000 hours at 40°C. Its 66.5 dB(A) noise rating means it is primarily intended for equipment where cooling performance has priority over quiet operation. 

Technical Specifications

Applications

The PFB1248UHE is suitable for high-airflow cooling in:

• Rack-mounted servers

• Data-storage equipment

• Network switches and routers

• Telecom base-station equipment

• 48V communication power systems

• Industrial power supplies

• UPS and battery systems

• Inverters and motor drives

• High-power electronic cabinets

• Test and measurement systems

• Equipment with dense heat sinks or restricted airflow paths

48V Power Requirements

The PFB1248UHE is designed for a 48V DC supply and should not be connected directly to a 12V or 24V fan circuit. The equipment power supply must provide sufficient current during fan startup and continuous operation.

For systems using several PFB1248UHE fans, the available power capacity, wiring size, connector rating and startup-current requirements should be checked before installation.

PFB1248UHE Replacement Selection

A replacement for the Delta PFB1248UHE should match both its mechanical format and electrical performance. A standard 12038 fan may fit the same opening but may not deliver sufficient airflow or static pressure.

The following parameters should be confirmed:

• Complete model number and suffix

• 48V rated supply

• 120 × 120 × 38mm dimensions

• Mounting-hole positions

• Airflow and static-pressure curve

• Rated and startup current

• Two-wire or signal-wire configuration

• Connector type and pin assignment

• PWM, tachometer or alarm requirements

• Airflow and rotation direction

• Noise limits

• Operating temperature and bearing life

PFB1224UHE has a similar 12038 mechanical format but uses a 24V supply, so it is not a direct electrical replacement. PFB1248UHE-EP and OEM-specific PFB1248UHE versions may also have different airflow, wiring, signal or environmental specifications. The complete fan label should be verified before ordering.

Stock and Lead Time

Availability depends on order quantity, production lot and any required suffix or connector configuration. DataStorageIC can support PFB1248UHE sourcing and provide compatible 48V replacement fans based on dimensions, airflow, static pressure, power, wiring and installation requirements.

Send the complete fan label, required quantity, connector photo and equipment application to request PFB1248UHE stock, price, lead time or replacement recommendations.