Home » Fan Motor 1/5 Hp, 115V– Replaces Century ORV4540 | NBK-20521
Ao Smith

Fan Motor 1/5 Hp, 115V– Replaces Century ORV4540 | NBK-20521

Special order item - may require extra time to fulfill and ship. Special order parts are non-returnable.

In stock
SKU: SO-20521
$240.00
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NBK-20521 – Fan Motor 1/5 HP 115V – NBK

The NBK-20521 Fan Motor is a dependable OEM-equivalent replacement designed for RV air conditioning systems from Dometic, Duo Therm, and Century. Operating on 115V power with a 1/5 horsepower output, this motor delivers consistent airflow and reliable cooling performance. It is a direct replacement for the widely used Century ORV4540 fan motor and multiple compatible RV AC models.

Built to meet or exceed OEM specifications, the NBK-20521 offers a precise drop-in fit, making it an ideal solution for RV owners and service technicians restoring proper air circulation.

Key Features

  • OEM-Compatible Replacement: Direct replacement for Century ORV4540 fan motor
  • Reliable Airflow: 1/5 HP output supports efficient RV AC operation
  • Durable Construction: Designed for continuous-duty use in RV air conditioning systems
  • Direct-Fit Design: Matches OEM mounting and electrical specifications

Specifications

  • SKU: 20521
  • UPC: 810069181257
  • Category: AC Motor / RV Parts
  • OEM Brand: AO Smith / Century
  • Voltage: 115V
  • Horsepower: 1/5 HP
  • Application: RV air conditioner fan motor

Equivalent To

  • Century: ORV4540
  • Dometic: 3105054.005
  • Duo Therm: F42B34A61, F42C40A61, F42C61A61, F42E63A61

Why Choose the NBK-20521?

The NBK-20521 is a trusted replacement fan motor for RV air conditioning systems. With OEM-level compatibility, dependable airflow, and durable construction, it helps restore proper cooling performance and extend the life of RV AC equipment.