11938MB-A1N-EA NMB 115V fan

Description

The NMB 11938MB-A1N-EA is an industrial-grade AC axial cooling fan engineered for continuous thermal management in high-density electrical enclosures, CNC machine tool cabinets, power distribution systems, and industrial automation chassis. Featuring precision dual ball bearings and a rugged aluminum housing, this unit ensures stable aerodynamic performance and thermal dissipation under continuous operating conditions.

MODEL CODE ARCHITECTURE & DECODING
Series Breakdown: 11938MB-A1N-EA
11938: Dimensions 119 mm x 119 mm x 38 mm
M: AC Axial Fan Series
B: Dual Precision Ball Bearing System
A1: Rated Voltage 115V AC (100V – 125V Operating Range)
N: Speed Designation (Standard High-Performance Class)
E: Housing Configuration (Flanged Aluminum Die-Cast Frame)
A: Connection and Impeller Specification Variant

TECHNICAL SPECIFICATIONS
Manufacturer: NMB Technologies (MinebeaMitsumi)
Model Number: 11938MB-A1N-EA
Rated Voltage: 115V AC
Operational Voltage Range: 100V AC to 125V AC
Rated Frequency: 50/60 Hz
Input Power: 14.0 W (50 Hz) / 13.0 W (60 Hz)
Rated Current: 0.18 A (50 Hz) / 0.15 A (60 Hz)
Rotational Speed: 2600 RPM (50 Hz) / 3000 RPM (60 Hz)
Maximum Airflow: 95.3 CFM (2.70 m³/min) at 50 Hz / 109.4 CFM (3.10 m³/min) at 60 Hz
Maximum Static Pressure: 58.8 Pa (0.24 in H2O) at 50 Hz / 78.4 Pa (0.31 in H2O) at 60 Hz
Acoustic Noise Level: 38.0 dBA (50 Hz) / 42.0 dBA (60 Hz)
Bearing Type: Dual High-Precision Stainless Steel Ball Bearings
Frame Material: Die-Cast Aluminum (Black Coating)
Impeller Material: PBT Thermoplastic (UL 94V-0 Rated)
Motor Structure: Shaded-Pole Induction Motor, Impedance Protected
Insulation Resistance: Minimum 100 MΩ at 500V DC
Dielectric Strength: 1500V AC for 1 minute
Operating Temperature Range: -10°C to +70°C
Storage Temperature Range: -40°C to +70°C
Expected Service Life (L10): 100,000 Hours at 25°C / 40,000 Hours at 60°C
Dimensions: 119.0 mm x 119.0 mm x 38.0 mm (Ø 120 mm Mounting Pattern)
Mounting Hole Spacing: 104.8 mm ± 0.3 mm
Mounting Hole Diameter: Ø 4.3 mm (4 Holes)
Termination: 2-Pin Faston Terminals / Lead Wire Compatible
Weight: 530 g
Certifications: UL Recognized (E89936), CSA Certified, CE Marked, RoHS Compliant

INDUSTRIAL APPLICATION & INTEGRATION
The NMB 11938MB-A1N-EA is specifically deployed where compact volumetric envelope constraints collide with severe static pressure drops. In industrial automation cabinets and CNC controller enclosures, localized heat buildup from variable frequency drives (VFDs) and servo controllers degrades component reliability. The high static pressure generated by the 11938MB aerodynamically forces air through dense dust-filter assemblies and packed electronic racks, preventing thermal shutdown and extending overall drive service life.

B2B PROCUREMENT & LOGISTICS
Original Engineering: Manufactured to strict OEM standards to guarantee mechanical and electrical interchangeable drop-in replacement.
Technical Compatibility: Form, fit, and functional replacement for standard 119 mm x 38 mm and 120 mm x 38 mm AC chassis cooling fans.
Lead Time: Ex-stock availability for standard volume orders; scheduled supply agreements and staggered batch delivery supported.
Packaging & Quality Assurance: Industrial tray packaging with full transit inspection protocols for batch integrity.