Frequently Asked Questions
What is Delta Electronics QFR1212GHE?
QFR1212GHE is a Delta Electronics 12 VDC brushless axial cooling fan with a 120 x 120 x 38 mm frame, two ball bearings and a two-wire power connection.
What voltage does QFR1212GHE require?
The Delta manufacturer approval specification identifies a nominal voltage of 12 VDC and an operating voltage range of 8.0–13.2 VDC.
What are the physical dimensions and mounting pattern?
The frame measures 120 x 120 x 38 mm. The manufacturer drawing specifies 105 x 105 mm mounting-hole spacing with 4.5 mm diameter holes and a reference wire length of 340 ±10 mm.
What is the input current?
Delta specifies 1.80 A input current and 2.70 A maximum. The mechanical drawing shows a 2.70 A current marking on the fan label, representing the maximum rather than the nominal input current.
What is the input power?
The manufacturer approval specification lists 21.60 W input power and 32.40 W maximum. Power supply capacity should account for the documented electrical requirements.
What is the reference rotational speed?
The exact-model approval specification lists 6000 RPM at rated voltage. This is the base QFR1212GHE reference speed, not a performance claim for every specialized suffix variant.
What is the maximum airflow?
Delta specifies 210.38 CFM (5.957 m³/min) maximum free-air flow, with a minimum specified value of 189.34 CFM. Actual airflow depends on the equipment's pressure-flow resistance.
What is the maximum static pressure?
The manufacturer lists 1.170 inH₂O (29.179 mmH₂O) maximum static pressure, with a minimum specified maximum-pressure value of 0.945 inH₂O. Maximum static pressure occurs at zero airflow, separately from maximum free-air flow.
What is the acoustical noise rating?
Delta lists 64.0 dB(A) average and 68.0 dB(A) maximum. The specification describes a measurement at one meter from the fan intake in free air under anechoic test conditions.
What bearing system and construction materials are used?
The fan uses two ball bearings, a UL 94 V-0 plastic frame and a UL 94 V-0 plastic impeller. The manufacturer lists a weight of 330 g and a reference life of 50,000 hours at 40°C under specified test conditions.
Does QFR1212GHE have PWM control or speed feedback?
The unsuffixed QFR1212GHE approval drawing identifies two DC power leads without separate PWM or speed-feedback wiring. Delta's series documentation identifies -F00 and -R00 monitoring-signal options; their connection functions differ from the base model.
What should be checked before ordering Delta QFR1212GHE?
Confirm the complete QFR1212GHE marking and any suffix, 12 VDC supply, 1.80 A operating and 2.70 A maximum current, 120 x 120 x 38 mm frame, 105 mm mounting-hole spacing, 6000 RPM reference speed, 210.38 CFM airflow rating, two-wire polarity, connector arrangement and equipment cooling requirements.