Allen-Bradley 1336-PB-SP2B Precharge PC Board

The Allen-Bradley 1336-PB-SP2B is a precharge printed circuit board designed for use within the 1336 series drive systems. This component is essential for managing the initial inrush current during the power-up sequence of the drive, protecting sensitive internal electronics from voltage spikes and surge currents.

Features

• Original Allen-Bradley component for 1336 series drives
• Manages DC bus precharge sequence
• Protects drive power components from high inrush current
• Direct replacement for specified 1336 drive configurations

Technical Specifications

Installation Guidelines

• Ensure the drive is completely disconnected from the main power supply and that the DC bus capacitors have been fully discharged before attempting to access or replace the board.
• Observe standard electrostatic discharge (ESD) precautions when handling the circuit board to prevent damage to integrated components.
• Verify that the replacement board matches the original part number and revision level required by your specific drive model.
• Ensure all ribbon cables and terminal connections are securely seated and free of debris or oxidation before restoring power.
• Inspect the surrounding drive environment for signs of heat damage or debris that may have contributed to the failure of the previous board.

FAQ

Is the 1336-PB-SP2B still in production?
No, this model has been discontinued by the manufacturer. We provide high-quality spare parts to support legacy systems.

What is the function of this board?
The precharge board limits the current flowing into the drive's DC bus capacitors during the initial power-up phase to prevent damage to the rectifier and contactor components.