Allen‑Bradley 81001-956-65-R Snubber Resistor Assembly Industrial Spare Part

Product Overview

Core Specifications

• Rated power: 600 W continuous power dissipation
• Nominal resistance: 15 Ω
• Full assembly package: Integrated power resistor + mounting bracket + wiring terminals as one complete kit
• Part lifecycle: Active official spare part, available for drive and MCC cabinet maintenance replacement
• Unit condition: Refurbished version (-R suffix), passed factory electrical performance retest, with aftermarket 1-year replacement warranty
• Installation: Surface panel mounting inside power control cabinet
• Operating ambient temperature: 0 ℃ ~ +60 ℃
• Protection housing: Metal heat sink structure for high heat dissipation
• Certifications: UL, cUL industrial safety certified
• Matching equipment: Rockwell medium voltage contactor assemblies, large servo drive systems, heavy motor control centers

Main Functions

1. Inductive Surge Absorption & Voltage Spike Suppression
    
   When inductive loads (motor windings, contactor coils) cut off power, huge reverse electromotive force will form high voltage spikes. This snubber resistor consumes surge energy instantly to avoid breakdown of drive power boards, PLC I/O modules and control circuit components.
2. Extend Service Life of Switching Devices
    
   Suppress arc reignition inside vacuum contactors and power semiconductors during motor start-stop, reduce contact ablation and semiconductor burnout failure rate.
3. Stabilize Cabinet Control Power Supply
    
   Filter instantaneous high-voltage interference on DC/AC bus, eliminate voltage fluctuation that causes HMI flicker, communication drop and PLC fault alarms.
4. Standardized Replacement Spare Kit
    
   Complete pre-assembled package, no separate resistor, bracket and terminal matching required, directly replace old damaged snubber assemblies on-site to shorten equipment downtime.
5. Protect Low-Voltage Control Circuits
    
   Block high-voltage surge backflow to 24V control loops, preventing damage to relays, safety switches and analog sensor signal circuits.

Key Advantages

• 600W high power rating adapts to heavy-duty large motor, medium voltage drive high surge scenarios
• Integrated assembly design simplifies on-site maintenance without separate part matching
• 15Ω standard resistance matched with Rockwell original power equipment circuit parameters, no performance mismatch risk
• Metal heat sink structure realizes efficient heat dissipation, long continuous operation without overheating
• Refurbished (-R) version undergoes full electrical testing, cost-effective alternative to brand-new original parts
• Wide industrial temperature range fits high-temperature power rooms and metallurgy, mining heavy industry cabinets
• Official Rockwell spare part number, compatible with standard 81001 series snubber assembly installation interfaces