Technical specifications, features, applications and purchasing information.
| Brand | NMB-MAT |
| Model Number | 11938MB-B2N-EA-00 |
| Product Category | AC Axial Fan |
| Manufacturer | NMB Technologies Corporation / MinebeaMitsumi |
| Product Series | 11938MB |
| Legacy Model Number | 4715MS-22T-B50-B00 |
| Manufacturer Cross-Reference | 11938MB-B2N-EA-00 Replaces 4715MS-22T-B50-B00 |
| Fan Type | AC Tubeaxial Cooling Fan |
| Electrical Supply Type | Single-Phase Alternating Current |
| Nominal Voltage | 220 VAC |
| Operating Frequency | 50 / 60 Hz |
| Starting Voltage | 145 VAC |
| Frame Dimensions (W × H × D) | 119 × 119 × 38 mm |
| Frame Width | 119 mm |
| Frame Height | 119 mm |
| Frame Depth | 38 mm |
| Common Fan Size Class | 120 × 120 × 38 mm Class |
| Manufacturer Frame Tolerance | 119.0 ±0.5 mm |
| Manufacturer Depth Tolerance | 38.0 ±0.5 mm |
| Rated Current at 50Hz | 0.120 A |
| Rated Current at 60Hz | 0.100 A |
| Input Power at 50Hz | 14.0 W |
| Input Power at 60Hz | 13.0 W |
| Input Power Tolerance | +10% / -20% According to NMB Series Documentation |
| Nominal Fan Speed at 50Hz | 2600 RPM |
| Nominal Fan Speed at 60Hz | 2900 RPM |
| Maximum Airflow at 50Hz | 89.3 CFM |
| Maximum Airflow at 60Hz | 103.6 CFM |
| Maximum Airflow at 50Hz in Metric Units | 2.50 m³/min |
| Maximum Airflow at 60Hz in Metric Units | 2.90 m³/min |
| Maximum Static Pressure at 50Hz | 63.8 Pa |
| Maximum Static Pressure at 60Hz | 75.6 Pa |
| Maximum Static Pressure at 50Hz in Inches of Water | 0.26 in H₂O |
| Maximum Static Pressure at 60Hz in Inches of Water | 0.30 in H₂O |
| Noise Level at 50Hz | 37 dB |
| Noise Level at 60Hz | 41 dB |
| Motor Structure | Shaded-Pole Induction Motor |
| Motor Protection | Impedance Protection |
| Bearing Type | Ball Bearing |
| Manufacturer-Listed Life Expectancy | 100,000 Hours L10 at 25°C |
| Approximate Fan Weight | 550 g |
The NMB-MAT 11938MB-B2N-EA-00 is an AC axial cooling fan designed for equipment operating from a nominal 220 VAC supply. Its shaded-pole induction motor supports forced-air ventilation in compatible industrial electrical cabinets, electronic equipment and AC-powered thermal management systems. This model must not be confused with similarly sized DC axial fans.
NMB publishes distinct specifications for 50Hz and 60Hz operation. At 50Hz, the fan is rated at 0.120 A, 14 W and 2600 RPM. At 60Hz, it is rated at 0.100 A, 13 W and 2900 RPM. These differences should be considered when evaluating cooling requirements for equipment operating on different electrical supply frequencies.
The manufacturer specifies maximum airflow of 89.3 CFM at 50Hz and 103.6 CFM at 60Hz. These figures correspond to approximately 2.50 and 2.90 m³/min, respectively. The fan supports forced-air cooling through compatible ventilation paths, while actual installed airflow depends on the equipment's resistance to air movement.
The 11938MB series uses a 119 × 119 × 38 mm frame with flange-type mounting. Manufacturer documentation identifies an aluminum housing, a black UL94V-0 plastic impeller and ball bearing construction. The mechanical drawing specifies a 105 mm mounting-hole spacing and an M4 grounding tap.
The shaded-pole induction motor incorporates impedance protection according to the manufacturer series datasheet. NMB lists an operating temperature range of -10°C to +70°C, insulation resistance of at least 100 MΩ at 500 VDC and dielectric withstand of 1800 VAC for three seconds. The fan is intended for installation with appropriate electrical insulation, protective grounding and equipment-level safety measures.
NMB identifies 11938MB-B2N-EA-00 as the updated designation for the legacy 4715MS-22T-B50-B00 AC cooling fan. The manufacturer cross-reference indicates that the replacement designation retains the legacy performance and capabilities. Installation compatibility should still be checked against the complete mechanical assembly, terminal connection and equipment supply specifications.
We support online purchase inquiries for the NMB-MAT 11938MB-B2N-EA-00 AC Axial Fan. If you need to make bulk purchases or inquire about other industrial cooling products, please contact our team with the required quantity, exact model number and equipment specifications. The fan is specified for nominal 220 VAC operation at 50Hz or 60Hz, with two standard electrical terminals and flange-type mounting. We can provide quotation information and discuss applicable delivery and transportation arrangements after reviewing your request. If replacing the earlier 4715MS-22T-B50-B00 model, please verify the equipment supply, terminal arrangement, mounting-hole spacing, fan airflow direction and available installation clearance. AC electrical installation should be carried out by appropriately qualified personnel using applicable safety procedures.
What is NMB-MAT 11938MB-B2N-EA-00?
NMB-MAT 11938MB-B2N-EA-00 is a 220 VAC axial cooling fan from the NMB Technologies 11938MB series. It has a 119 × 119 × 38 mm frame, a shaded-pole induction motor, ball bearings and a two-terminal electrical connection. The manufacturer publishes separate 50Hz and 60Hz operating specifications.
Is 11938MB-B2N-EA-00 an AC or DC cooling fan?
It is an AC axial cooling fan. NMB lists a nominal operating voltage of 220 VAC and supports 50Hz and 60Hz supply frequencies. It must not be connected directly to a 12 VDC, 24 VDC or 48 VDC fan supply or substituted for a DC fan solely because the frame dimensions are similar.
What is the rated voltage and frequency of 11938MB-B2N-EA-00?
The manufacturer specifies 220 VAC nominal voltage and operation at either 50Hz or 60Hz. The documented starting voltage is 145 VAC. Starting voltage is not the recommended continuous supply rating; the fan should be used according to the manufacturer's applicable electrical specifications and the equipment's design.
What are the dimensions and mounting specifications?
The nominal frame measures 119 mm wide, 119 mm high and 38 mm deep. The manufacturer mechanical drawing specifies 119.0 ±0.5 mm frame dimensions, 38.0 ±0.5 mm thickness, 105.0 ±0.3 mm mounting hole center spacing and 4.3 mm mounting holes. The housing uses a flange-type mounting configuration.
What is the rated current at 50Hz and 60Hz?
At 50Hz, the manufacturer lists a current of 0.120 A. At 60Hz, the listed current is 0.100 A. These are the manufacturer-specific values for this model. Some distributor records show different generic current figures, so the NMB frequency-specific specifications should take precedence when evaluating the fan's documented rating.
What is the input power at 50Hz and 60Hz?
The manufacturer specifies 14 W at 50Hz and 13 W at 60Hz, with a published input-power tolerance of +10% / -20%. These are real input-power specifications for the AC fan. Multiplying the supply voltage by the RMS current does not necessarily yield the real power because the motor's power factor must be considered.
What is the fan speed of 11938MB-B2N-EA-00?
The nominal fan speed is 2600 RPM at 50Hz and 2900 RPM at 60Hz. This frequency-dependent difference is characteristic of the documented AC motor configuration and should be considered when assessing airflow or replacing equipment used on different power networks.
What are the maximum airflow and static pressure ratings?
At 50Hz, NMB specifies 89.3 CFM maximum airflow and 63.8 Pa maximum static pressure. At 60Hz, it specifies 103.6 CFM and 75.6 Pa, respectively. Maximum free-air flow and maximum static pressure describe different points on the fan's performance curve and are not reached simultaneously. The installed airflow depends on enclosure and ventilation resistance.
What is the noise level of 11938MB-B2N-EA-00?
The manufacturer's acoustic rating is 37 dB at 50Hz and 41 dB at 60Hz. Actual installed noise may vary with mounting structure, vibration, protective guards and airflow restriction. Use the frequency-specific rating rather than assuming a single noise value applies under all operating conditions.
What bearing type, motor structure and service life does the fan have?
The manufacturer specifies ball bearings and a shaded-pole induction motor with impedance protection. NMB lists an L10 expected life of 100,000 hours at 25°C. This is a statistical life reference under defined conditions, not a guaranteed operating duration for each fan. The documented operating temperature range is -10°C to +70°C in non-condensing conditions.
Does 11938MB-B2N-EA-00 use terminals or lead wires?
The standard product configuration uses two electrical terminals, described by NMB as Faston #110 or equivalent. The broader 11938MB series documentation also describes an available lead-wire type using UL3266 AWG22 wire. A lead-wire version should not be assumed identical to the two-terminal assembly without checking the actual connection and part configuration. The mechanical drawing also identifies an M4 earth tap for protective grounding.
Can 11938MB-B2N-EA-00 replace 4715MS-22T-B50-B00, and what should be checked before ordering?
Yes. NMB identifies 4715MS-22T-B50-B00 as the legacy part number corresponding to 11938MB-B2N-EA-00. The updated designation retains the documented 220 VAC, 50/60Hz cooling fan characteristics. Before ordering, verify the full model, supply voltage and frequency, two-terminal connection, 119 × 119 × 38 mm frame, flange mounting, 105 mm mounting-hole spacing, counterclockwise rotation when viewed from the label side, airflow outlet toward the label side, protective grounding arrangement and required cooling performance. Nearby 11938MB-B0N, B3N and B4N models have different nominal voltage ratings and should not be treated as automatically interchangeable.
Send us your part number and technical requirements.
Explore more industrial components from our catalog.
Available in stock (400)
| Brand | NMB-MAT |
| Model Number | 11938MB-B2N-EA-00 |
| Product Category | AC Axial Fan |
| Manufacturer | NMB Technologies Corporation / MinebeaMitsumi |
| Product Series | 11938MB |
| Legacy Model Number | 4715MS-22T-B50-B00 |
| Manufacturer Cross-Reference | 11938MB-B2N-EA-00 Replaces 4715MS-22T-B50-B00 |
| Fan Type | AC Tubeaxial Cooling Fan |
| Electrical Supply Type | Single-Phase Alternating Current |
| Nominal Voltage | 220 VAC |
| Operating Frequency | 50 / 60 Hz |
| Starting Voltage | 145 VAC |
| Frame Dimensions (W × H × D) | 119 × 119 × 38 mm |
| Frame Width | 119 mm |
| Frame Height | 119 mm |
| Frame Depth | 38 mm |
| Common Fan Size Class | 120 × 120 × 38 mm Class |
| Manufacturer Frame Tolerance | 119.0 ±0.5 mm |
| Manufacturer Depth Tolerance | 38.0 ±0.5 mm |
| Rated Current at 50Hz | 0.120 A |
| Rated Current at 60Hz | 0.100 A |
| Input Power at 50Hz | 14.0 W |
| Input Power at 60Hz | 13.0 W |
| Input Power Tolerance | +10% / -20% According to NMB Series Documentation |
| Nominal Fan Speed at 50Hz | 2600 RPM |
| Nominal Fan Speed at 60Hz | 2900 RPM |
| Maximum Airflow at 50Hz | 89.3 CFM |
| Maximum Airflow at 60Hz | 103.6 CFM |
| Maximum Airflow at 50Hz in Metric Units | 2.50 m³/min |
| Maximum Airflow at 60Hz in Metric Units | 2.90 m³/min |
| Maximum Static Pressure at 50Hz | 63.8 Pa |
| Maximum Static Pressure at 60Hz | 75.6 Pa |
| Maximum Static Pressure at 50Hz in Inches of Water | 0.26 in H₂O |
| Maximum Static Pressure at 60Hz in Inches of Water | 0.30 in H₂O |
| Noise Level at 50Hz | 37 dB |
| Noise Level at 60Hz | 41 dB |
| Motor Structure | Shaded-Pole Induction Motor |
| Motor Protection | Impedance Protection |
| Bearing Type | Ball Bearing |
| Manufacturer-Listed Life Expectancy | 100,000 Hours L10 at 25°C |
| Approximate Fan Weight | 550 g |
The NMB-MAT 11938MB-B2N-EA-00 is an AC axial cooling fan designed for equipment operating from a nominal 220 VAC supply. Its shaded-pole induction motor supports forced-air ventilation in compatible industrial electrical cabinets, electronic equipment and AC-powered thermal management systems. This model must not be confused with similarly sized DC axial fans.
NMB publishes distinct specifications for 50Hz and 60Hz operation. At 50Hz, the fan is rated at 0.120 A, 14 W and 2600 RPM. At 60Hz, it is rated at 0.100 A, 13 W and 2900 RPM. These differences should be considered when evaluating cooling requirements for equipment operating on different electrical supply frequencies.
The manufacturer specifies maximum airflow of 89.3 CFM at 50Hz and 103.6 CFM at 60Hz. These figures correspond to approximately 2.50 and 2.90 m³/min, respectively. The fan supports forced-air cooling through compatible ventilation paths, while actual installed airflow depends on the equipment's resistance to air movement.
The 11938MB series uses a 119 × 119 × 38 mm frame with flange-type mounting. Manufacturer documentation identifies an aluminum housing, a black UL94V-0 plastic impeller and ball bearing construction. The mechanical drawing specifies a 105 mm mounting-hole spacing and an M4 grounding tap.
The shaded-pole induction motor incorporates impedance protection according to the manufacturer series datasheet. NMB lists an operating temperature range of -10°C to +70°C, insulation resistance of at least 100 MΩ at 500 VDC and dielectric withstand of 1800 VAC for three seconds. The fan is intended for installation with appropriate electrical insulation, protective grounding and equipment-level safety measures.
NMB identifies 11938MB-B2N-EA-00 as the updated designation for the legacy 4715MS-22T-B50-B00 AC cooling fan. The manufacturer cross-reference indicates that the replacement designation retains the legacy performance and capabilities. Installation compatibility should still be checked against the complete mechanical assembly, terminal connection and equipment supply specifications.
We support online purchase inquiries for the NMB-MAT 11938MB-B2N-EA-00 AC Axial Fan. If you need to make bulk purchases or inquire about other industrial cooling products, please contact our team with the required quantity, exact model number and equipment specifications. The fan is specified for nominal 220 VAC operation at 50Hz or 60Hz, with two standard electrical terminals and flange-type mounting. We can provide quotation information and discuss applicable delivery and transportation arrangements after reviewing your request. If replacing the earlier 4715MS-22T-B50-B00 model, please verify the equipment supply, terminal arrangement, mounting-hole spacing, fan airflow direction and available installation clearance. AC electrical installation should be carried out by appropriately qualified personnel using applicable safety procedures.
What is NMB-MAT 11938MB-B2N-EA-00?
NMB-MAT 11938MB-B2N-EA-00 is a 220 VAC axial cooling fan from the NMB Technologies 11938MB series. It has a 119 × 119 × 38 mm frame, a shaded-pole induction motor, ball bearings and a two-terminal electrical connection. The manufacturer publishes separate 50Hz and 60Hz operating specifications.
Is 11938MB-B2N-EA-00 an AC or DC cooling fan?
It is an AC axial cooling fan. NMB lists a nominal operating voltage of 220 VAC and supports 50Hz and 60Hz supply frequencies. It must not be connected directly to a 12 VDC, 24 VDC or 48 VDC fan supply or substituted for a DC fan solely because the frame dimensions are similar.
What is the rated voltage and frequency of 11938MB-B2N-EA-00?
The manufacturer specifies 220 VAC nominal voltage and operation at either 50Hz or 60Hz. The documented starting voltage is 145 VAC. Starting voltage is not the recommended continuous supply rating; the fan should be used according to the manufacturer's applicable electrical specifications and the equipment's design.
What are the dimensions and mounting specifications?
The nominal frame measures 119 mm wide, 119 mm high and 38 mm deep. The manufacturer mechanical drawing specifies 119.0 ±0.5 mm frame dimensions, 38.0 ±0.5 mm thickness, 105.0 ±0.3 mm mounting hole center spacing and 4.3 mm mounting holes. The housing uses a flange-type mounting configuration.
What is the rated current at 50Hz and 60Hz?
At 50Hz, the manufacturer lists a current of 0.120 A. At 60Hz, the listed current is 0.100 A. These are the manufacturer-specific values for this model. Some distributor records show different generic current figures, so the NMB frequency-specific specifications should take precedence when evaluating the fan's documented rating.
What is the input power at 50Hz and 60Hz?
The manufacturer specifies 14 W at 50Hz and 13 W at 60Hz, with a published input-power tolerance of +10% / -20%. These are real input-power specifications for the AC fan. Multiplying the supply voltage by the RMS current does not necessarily yield the real power because the motor's power factor must be considered.
What is the fan speed of 11938MB-B2N-EA-00?
The nominal fan speed is 2600 RPM at 50Hz and 2900 RPM at 60Hz. This frequency-dependent difference is characteristic of the documented AC motor configuration and should be considered when assessing airflow or replacing equipment used on different power networks.
What are the maximum airflow and static pressure ratings?
At 50Hz, NMB specifies 89.3 CFM maximum airflow and 63.8 Pa maximum static pressure. At 60Hz, it specifies 103.6 CFM and 75.6 Pa, respectively. Maximum free-air flow and maximum static pressure describe different points on the fan's performance curve and are not reached simultaneously. The installed airflow depends on enclosure and ventilation resistance.
What is the noise level of 11938MB-B2N-EA-00?
The manufacturer's acoustic rating is 37 dB at 50Hz and 41 dB at 60Hz. Actual installed noise may vary with mounting structure, vibration, protective guards and airflow restriction. Use the frequency-specific rating rather than assuming a single noise value applies under all operating conditions.
What bearing type, motor structure and service life does the fan have?
The manufacturer specifies ball bearings and a shaded-pole induction motor with impedance protection. NMB lists an L10 expected life of 100,000 hours at 25°C. This is a statistical life reference under defined conditions, not a guaranteed operating duration for each fan. The documented operating temperature range is -10°C to +70°C in non-condensing conditions.
Does 11938MB-B2N-EA-00 use terminals or lead wires?
The standard product configuration uses two electrical terminals, described by NMB as Faston #110 or equivalent. The broader 11938MB series documentation also describes an available lead-wire type using UL3266 AWG22 wire. A lead-wire version should not be assumed identical to the two-terminal assembly without checking the actual connection and part configuration. The mechanical drawing also identifies an M4 earth tap for protective grounding.
Can 11938MB-B2N-EA-00 replace 4715MS-22T-B50-B00, and what should be checked before ordering?
Yes. NMB identifies 4715MS-22T-B50-B00 as the legacy part number corresponding to 11938MB-B2N-EA-00. The updated designation retains the documented 220 VAC, 50/60Hz cooling fan characteristics. Before ordering, verify the full model, supply voltage and frequency, two-terminal connection, 119 × 119 × 38 mm frame, flange mounting, 105 mm mounting-hole spacing, counterclockwise rotation when viewed from the label side, airflow outlet toward the label side, protective grounding arrangement and required cooling performance. Nearby 11938MB-B0N, B3N and B4N models have different nominal voltage ratings and should not be treated as automatically interchangeable.
