Frequently Asked Questions
What is NMB-MAT 3615RL-05W-B30?
NMB-MAT 3615RL-05W-B30 is a 24 VDC axial cooling fan from NMB Technologies. The manufacturer documents two standard complete versions: 3615RL-05W-B30-B00 and 3615RL-05W-B30-E00. Both have a nominal 92 × 92 × 38 mm frame, 0.40 A current rating, 5000 RPM speed and 103.8 CFM maximum airflow. Their principal documented difference is the frame style.
Is 3615RL-05W-B30 an AC fan or a DC fan?
It is a brushless DC axial cooling fan. NMB specifies a nominal 24 VDC supply. It should not be connected directly to a 115 VAC, 220 VAC or 230 VAC electrical supply. Similar frame dimensions do not establish compatibility with AC-powered cooling fans.
What are the rated voltage and operating voltage range?
The nominal voltage is 24 VDC. The verified operating voltage range is 14.0–27.6 VDC according to manufacturer 09238RA documentation and DigiKey's legacy part specifications. NMB's individual legacy B30 webpages contain an apparent error showing an upper voltage of 13.2 V, which is below the stated nominal voltage. The cross-checked 27.6 V upper limit is used for this product description.
What is the rated current and power consumption of 3615RL-05W-B30?
NMB specifies 0.40 A current and 9.6 W input power for both standard -B00 and -E00 configurations. These ratings apply at nominal 24 VDC. Power supply capacity, electrical connector arrangement and any equipment-level fan monitoring requirements should be confirmed before installation.
What are the physical dimensions and mounting-hole specifications?
The nominal frame is 92 mm wide, 92 mm high and 38 mm deep. Some legacy distributor specifications describe a 38.4 mm depth. Manufacturer series drawings identify mounting-hole center spacing of approximately 82.5 mm and mounting holes of 4.3 mm diameter. Compare the existing fan housing and mounting clearance before replacement, especially when changing between rib-type and flange-type frames.
What is the fan speed of NMB 3615RL-05W-B30?
The manufacturer specifies 5000 RPM for both the 3615RL-05W-B30-B00 and 3615RL-05W-B30-E00. This is the published B30 performance rating. Other 3615RL speed classes, including B40, B50 and B70, have different electrical and airflow specifications and should not be treated as identical.
What is the maximum airflow and static pressure?
NMB specifies 103.8 CFM maximum airflow, equivalent to approximately 2.94 m³/min, and 142 Pa maximum static pressure, equivalent to 0.57 inches of water. Maximum free-air flow and maximum static pressure occur at different points on the fan curve and are not achieved simultaneously. The installed airflow depends on the enclosure and ventilation system resistance.
What is the noise level of 3615RL-05W-B30?
The manufacturer's published acoustic rating is 52.5 dB for the documented B30 configurations. Actual noise in an installed cabinet may vary depending on the mounting method, protective fan guards, airflow resistance, vibration and surrounding enclosure structure.
What bearing type, materials and expected life does the fan use?
The documented fan uses ball bearings, a black UL94V-0 plastic casing and a black UL94V-0 plastic impeller. NMB lists a 100,000-hour L10 expected life at 25°C and an operating temperature range of -10°C to +70°C. The L10 figure is a statistical reliability measure under defined conditions, rather than a guaranteed service life for every individual fan.
Does 3615RL-05W-B30 have two, three or four wires?
The manufacturer's standard -B00 and -E00 versions use two electrical power leads. NMB series documentation identifies red positive and black negative wires with UL3385 AWG26 construction. These standard versions do not have separate tachometer, locked-rotor alarm or PWM input conductors. Do not assume that a modified equipment-specific harness uses an identical connector or pin arrangement.
What is the difference between 3615RL-05W-B30-B00 and 3615RL-05W-B30-E00?
NMB identifies the -B00 as a rib-type fan and the -E00 as a flange-type fan. Both share the same documented 24 VDC, 0.40 A, 9.6 W, 5000 RPM, 103.8 CFM, 142 Pa and 52.5 dB specifications. However, the frame construction and mounting details differ. The manufacturer's respective new part numbers are 09238RA-24L-AAD-0 for the rib-type -B00 and 09238RA-24L-EAD-0 for the flange-type -E00.
Is 3615RL-05W-B30 discontinued, and what should be checked before ordering?
Yes. NMB lists both standard 3615RL-05W-B30-B00 and 3615RL-05W-B30-E00 models as end of life and no longer in production. The manufacturer recommends 09238RA-24L-AAD-0 for -B00 and 09238RA-24L-EAD-0 for -E00. Before ordering, confirm the full legacy suffix, rib-type or flange-type frame, 24 VDC nominal voltage, 0.40 A current, 9.6 W input power, 92 × 92 × 38 mm dimensions, mounting-hole spacing, wiring polarity, cable termination, rotation and airflow direction, and the equipment's cooling requirements. Related 12 VDC, 48 VDC or higher-speed 3615RL models should not be assumed interchangeable. If using a replacement 09238RA assembly, check its complete current product number and mechanical specifications against the existing installation.