BT1-0157 Rotary Potentiometer Fan Resistor Assembly

The BT1-0157 Rotary Potentiometer Fan Resistor Assembly is designed to regulate blower motor speed in mobile heating and air conditioning systems. Featuring a 5K ohm potentiometer, this unit allows continuous variable fan speed adjustment, giving operators precise airflow control instead of fixed-speed steps.

Rated for 12V and 24V systems, the BT1-0157 includes an integrated diode for electrical protection and a Metri-Pack connector for secure, OEM-style electrical connections. Its compact cylindrical design allows for easy panel or enclosure mounting in vehicle cabs, equipment consoles, and HVAC control panels.

This assembly is commonly used in truck HVAC systems, off-highway equipment, agricultural machinery, and industrial cabs where dependable, adjustable blower control is required.

Electrical Specifications

• Voltage Rating: 12V / 24V

• Resistance: 5K Ohm

• Speed Control: Variable (rotary potentiometer)

• Terminal Contacts: 3

• Integrated Component: Diode

Dimensional Specifications

• Overall Length: 5-3/4 in

• Body Diameter: 1 in

• Overall Height: 1-4/9 in

• Hole-to-Hole Dimension: N/A

Compact sizing allows installation in tight control panels and HVAC enclosures.

Connector & Design Features

• Connector Type: Metri-Pack

• Rotary shaft control

• Integrated diode for circuit protection

• Durable construction for mobile environments

• Smooth variable resistance for precise fan control

Common Applications

The BT1-0157 Fan Resistor Assembly is commonly used for:

• Heater blower speed control

• A/C evaporator fan control

• Mobile HVAC systems

• Truck, bus, and vocational vehicles

• Agricultural and construction equipment

• Industrial cab climate systems

Product Specifications Summary

• BTRAC Part Number: BT1-0157

• Product Type: Rotary potentiometer fan resistor assembly

• Voltage: 12V / 24V

• Resistance: 5K Ohm

• Speed Type: Variable

• Terminal Count: 3

• Connector: Metri-Pack

Interchange / Cross Reference Numbers

• Red Dot: 71R1530

• Red Dot Factory: RD-5-8487-1P

• 2075-816

• 264-0009

• 4379-RD584871

• 4379-RD584871P

• AT219733

• RDHRD584871P

• RDT71R1530

• XA4478