Allen Bradley 81001-956-65-R 100W PowerFlex Drive Resistor

Product Overview

The Allen Bradley 81001-956-65-R is a high-wattage, industrial-grade power resistor designed for integration within the PowerFlex drive series. Rated at 100 Watts, this heavy-duty component manages thermal energy dissipation and voltage stabilization within the drive's internal circuitry. Often utilized in braking or snubber circuits, it protects the drive's power semiconductors by absorbing transient energy spikes. We supply this component in 100% Brand New and Original condition to ensure your hardware maintains factory-spec safety and performance.

Technical Specifications

The 81001-956-65-R is engineered for high-heat environments and demanding duty cycles:

Engineering Advantages

The 81001-956-65-R addresses critical thermal and electrical challenges within a VFD:

• Superior Heat Dissipation: The resistor's physical architecture maximizes surface area contact with the drive's heat sink or chassis. This design ensures the component sheds 100W of thermal energy efficiently, preventing the internal cabinet temperature from exceeding safety limits.

• Transient Voltage Suppression: This resistor stabilizes the DC bus by bleeding off excess energy. This prevents "Overvoltage" faults during motor deceleration or sudden load changes, keeping your process running without interruption.

• Vibration-Proof Construction: Allen Bradley utilizes high-density potting compounds to secure the internal resistive wire. This prevents mechanical fatigue and open-circuit failures caused by the constant high-frequency vibration found in industrial motor control centers.

• Direct OEM Fitment: As an original spare part, the 81001-956-65-R features the exact lead lengths and mounting hole alignment required for PowerFlex chassis. This eliminates the need for field modifications or improvised mounting brackets that can compromise airflow.

FAQs

• Can I replace this with a standard 100W resistor from an electronics shop?

  We strongly advise against it. Industrial drive resistors like the 81001-956-65-R have specific inductance ratings and pulse-load capabilities designed by Rockwell Automation. Using a non-OEM part can lead to circuit resonance or premature failure of the drive's IGBTs.

• What are the signs that my current resistor has failed?

  A failed resistor often shows visible signs of overheating, such as charred insulation or cracked ceramic. Electrically, a failed unit will show "infinite" resistance (open circuit) on a multimeter, often causing the drive to trip on DC Bus Overvoltage or Hardware FBP faults.

• Is this resistor "Plug and Play"?

  While it is a direct mechanical fit, you must ensure the drive is completely discharged (check DC bus voltage with a meter) before installation. Secure the mounting screws tightly to ensure a low-resistance thermal path to the chassis.

• Does this part include the mounting hardware?

  Typically, this part number refers to the resistor itself. We recommend retaining the original mounting screws and brackets from the drive chassis for installation.