AFB1248HE-R00 Delta 48V fan

Description

The Delta AFB1248HE-R00 is a heavy-duty 120x120x38 mm axial cooling solution engineered for telecommunications infrastructure, high-power DC conversion equipment, and continuous-operation server racks. Model decoding confirms AFB series baseline dual ball bearing mechanics with high-pressure PBT impeller profiling, 48 VDC operating nominal voltage, HE (High Efficiency / High Speed) motor classification, and factory-configured -R00 RD (Rotation Detector) sensor logic on the third conductor.

Technical Specifications:
Manufacturer: Delta Electronics
Model Number: AFB1248HE-R00
Dimensions: 120 x 120 x 38 mm (12038)
Mounting Hole Pitch: 105.0 ± 0.3 mm
Mounting Hole Diameter: Ø 4.3 ± 0.2 mm
Nominal Voltage: 48 VDC
Operating Voltage Range: 28.0 VDC to 56.0 VDC
Rated Current: 0.18 A
Maximum Input Current: 0.27 A
Rated Input Power: 8.64 W
Maximum Input Power: 12.96 W
Rotational Speed: 3200 RPM
Maximum Volumetric Airflow: 120.07 CFM (3.40 m³/min)
Maximum Static Pressure: 9.00 mmH2O (88.26 Pa / 0.354 inH2O)
Acoustic Sound Pressure Level: 48.0 dB(A)
Bearing System: Precision Dual Ball Bearings
Interface Wiring: 3-Wire Configuration (UL 1007 AWG #24 / #26)
Wire Lead Definition: Red = Positive (+48 VDC), Black = Ground (GND), Third Conductor = RD (Rotation Detector) Signal
RD Circuit Type: Open Collector Hardware Alarm Output
RD Function: Low state during active rotation; High/Open impedance on rotor stall
Frame Material: Glass-Fiber Reinforced Plastic (PBT UL 94V-0)
Impeller Material: Glass-Fiber Reinforced Plastic (PBT UL 94V-0)
Motor Protection: Electronically Protected / Polarity Protection and Locked Rotor Shutdown
Insulation Resistance: 10 MΩ minimum at 500 VDC between housing and lead wires
Dielectric Withstand: 500 VAC for 1 minute at 50/60 Hz
Operating Temperature Range: -10 °C to +70 °C
Storage Temperature Range: -40 °C to +75 °C
Life Expectancy (L10): 70,000 Hours continuous operation at +40 °C
Weight: 256 g
Compliance: RoHS, UL Recognized, cUL, TUV, CE

Technical Compatibility and Original Engineering:
This cooling fan complies with Original Engineering specifications of Delta Electronics, delivering exact physical and electrical interoperability with original equipment manufacturer assemblies. Technical Compatibility covers all standard 48V telecom rectifiers, industrial inverters, network switching backplanes, and uninterruptible power supply (UPS) modules designed for 12038 format axial airflow. The standardized mounting pattern ensures drop-in replacement across legacy and next-generation chassis without mechanical modification.

Industrial Application and Failure Mitigation:
In sealed telecom base stations, DC power plant enclosures, and high-density industrial control cabinets, high thermal load coupled with filter resistance generates high static backpressure. The AFB1248HE-R00 overcomes impedance constraints by generating 88.26 Pa of static pressure. The dedicated R00 Rotation Detector line alerts central system management microcontrollers instantly if a rotor stalls due to foreign obstruction or bearing end-of-life, triggering fail-safe protocols before critical power semiconductors encounter thermal runaway.

Supply and Commercial Overview:
Lead Time: Immediate fulfillment from available warehouse stock within 24 to 48 hours; factory lead times applied to recurring bulk procurement.
Packaging: Bulk industrial tray packaging preserving factory lead wire pin integrity.
Lifecycle Advantage: Dual ball bearing construction ensures long-term operational uptime, minimizing costly field replacement dispatches in remote installations.