Us Motors 6641rs Ecm Blower Motor 3/4 Hp 208-230V Oem Replacement

Product Description

The US MOTORS 6641rs is a variable-speed ECM blower motor engineered as a direct drop-in replacement for OEM constant torque ECM motors used in gas furnaces and air handlers. Rated at 3/4 horsepower and 208-230 volts, it operates across a speed range of 600 to 1200 RPM with up to five speeds determined by the OEM control signal. The motor ships pre-programmed with torque values matched to OEM performance specifications, eliminating field programming time. Built-in 6000-volt surge protection exceeds the protection level found in many OEM units, and the fully potted electric module provides superior resistance to moisture. Licensed HVAC technicians and mechanical contractors are the primary installers.

The 6641rs is suited for residential and light-commercial forced-air systems where the original ECM constant torque motor has failed or degraded. It is designed for use in gas furnaces and air handlers that rely on an OEM control signal to command blower speed. The reversible rotation and variable-speed capability make it adaptable across a range of furnace and air handler configurations without requiring custom reprogramming at the time of installation. Installers replacing a failed OEM ECM motor in an existing system will find the torque profile and mounting interface designed to match factory specifications.

Key Features

• Direct OEM replacement with pre-programmed torque values matched to factory performance
• 6000-volt surge protection, more than double the rating of many OEM ECM motors
• Fully potted electric module for superior moisture resistance
• Variable speed operation up to five speeds based on OEM control signal input
• Smooth, quiet speed transitions from integrated motor and module technology
• Open Air Over (OAO) enclosure for forced-air system airflow cooling

Compatibility

Designed as an OEM-style drop-in replacement for constant torque ECM motors in residential gas furnaces and air handlers that use a standard OEM control signal for blower speed regulation.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all electrical power to the furnace or air handler before removing the existing motor. Verify the replacement motor rotation direction and mounting orientation before securing the assembly, as the 6641rs supports reversible rotation. Follow all applicable local mechanical and electrical codes during installation and wiring of the control signal leads.

Technical Specifications

• Horsepower: 3/4 HP (also compatible range: 1/3, 1/2, 3/4, 1 HP)
• Rated Voltage: 208-230 volts
• Speed Range: 600 to 1200 RPM
• Nominal RPM: 1050 RPM
• Number of Speeds: Up to 5 (OEM control signal dependent)
• Enclosure Type: Open Air Over (OAO)
• Surge Protection: 6000 volts
• Rotation: Reversible
• Unit of Measure: Each

Standard Information

• Brand: US MOTORS
• Manufacturer Part Number: 6641rs