Frequently Asked Questions
What is NMB-MAT 12038VA-24N-FB?
NMB-MAT 12038VA-24N-FB is a 24 VDC axial cooling fan documented in industrial equipment spare-parts catalogs. Multiple exact-model sources specify a 120 × 120 × 38 mm frame, 0.96 A current marking and three-wire connection. A commonly documented assembly identifier is 12038VA-24N-FB, 01.
What is the rated voltage of 12038VA-24N-FB?
The nominal voltage is 24 VDC, consistently reported by multiple exact-model suppliers. NMB's standard 12038VA-24N series specifies an operating range of 18.0–27.6 VDC, but this has not been independently verified for the exact -FB configuration. Confirm the applicable voltage limits before installation.
What are the dimensions of 12038VA-24N-FB?
The documented fan dimensions are 120 mm wide, 120 mm high and 38 mm deep. The standard NMB 12038VA mechanical drawing shows approximately 105 mm between mounting-hole centers and 4.3 mm diameter mounting holes. Verify the actual -FB mounting frame, lead exit and connector clearance against the equipment.
What is the rated current and power consumption?
Several independent exact-model listings specify 0.96 A at 24 VDC. The calculated electrical input is therefore 23.04 W. This calculation is based on the reported current marking, not a separately confirmed manufacturer running-power measurement. It differs from the standard 12038VA-24N-EAE rating of 0.74 A and 17.76 W.
What is the fan speed of 12038VA-24N-FB?
Exact-model supplier information is inconsistent. Several commercial listings report 4700 RPM, while another gives 3600 RPM for an assembly designated 12038VA-24N-FB-01. The standard NMB 12038VA-24N-EAE model is rated at 4700 RPM, but its other electrical specifications differ. A manufacturer-confirmed exact-FA performance rating should not be inferred from the standard series; use an exact-FB datasheet or tested assembly data when speed is critical.
What is the maximum airflow of 12038VA-24N-FB?
One commercial -FB-01 supplier reports 130 CFM. NMB's standard 12038VA-24N-EAE configuration is rated at 182.6 CFM. Because those models have different current ratings and no manufacturer airflow curve was located specifically for -FB, neither value should be treated as a universally established maximum airflow for every -FB assembly.
What is the maximum static pressure?
An exact-model supplier lists approximately 122.5 Pa for 12038VA-24N-FB-01. The standard manufacturer-documented 12038VA-24N-EAE fan is rated at 207 Pa. This substantial difference reinforces the need to verify exact-suffix performance before using the fan in a system with restrictive filters, heatsinks or ventilation paths.
What is the noise level of 12038VA-24N-FB?
A commercial -FB-01 listing reports 53 dB(A), while NMB specifies 59 dB for the standard -24N-EAE model. A manufacturer noise specification for the exact -FB assembly has not been independently established. Actual installed noise also depends on enclosure geometry, fan guards, mounting and system airflow resistance.
Does 12038VA-24N-FB use three wires or four wires?
Multiple exact-model suppliers identify three electrical conductors. One industrial fan supplier documents three wires fitted to a white connector housing with four positions. Therefore, the connector may physically have four cavities without using four electrical leads. Verify the connector housing, populated contacts, lead colors and pin sequence before replacement.
Does the third wire provide a tachometer, alarm or PWM signal?
One exact-model supplier describes a tachometer output on the third wire. However, the signal function and its electrical characteristics have not been independently verified with an NMB -FB-specific wiring diagram. A three-wire interface does not, by itself, establish a dedicated PWM speed-control input. Do not assume the third wire can be connected to any particular control terminal without checking the exact equipment wiring.
What is the difference between 12038VA-24N-FB and 12038VA-24N-EAE-0?
Both belong to the NMB 12038VA family and share nominal 24 VDC operation and a 120 × 120 × 38 mm frame. The -FB is commercially documented at 0.96 A and commonly uses three wires, while the manufacturer specifies 0.74 A, 17.76 W and a standard two-wire interface for -EAE-0. The -EAE-0 also has confirmed performance ratings of 4700 RPM, 182.6 CFM and 207 Pa. The two models must not be assumed interchangeable without checking electrical load, connector wiring, mounting and cooling requirements.
What should be checked before ordering 12038VA-24N-FB?
Confirm the exact model 12038VA-24N-FB and any assembly identifier such as 01, nominal 24 VDC supply, 0.96 A current marking, 120 × 120 × 38 mm frame dimensions, mounting-hole spacing, three-wire arrangement, four-position or other connector housing, contact population, pin assignments, wire length, rotation and airflow direction. For inverter cooling applications, confirm the complete equipment model and existing fan assembly. If exact speed, airflow, static pressure, noise, ingress protection or monitoring behavior is required, obtain documentation for the -FB configuration rather than applying the manufacturer specifications of the different standard -24N-EAE model.