A-B Allen-Bradley

Model: 1336-SN-SP10A, Part Number: 74101-363-51

Full Name: Inverter Snubber Drive Board PCB

Applicable Equipment: Allen‑Bradley 1336 Series Variable Frequency Drives

This PCB snubber drive board is an original dedicated component for Allen‑Bradley 1336 series inverters. Its primary functions are as follows:

1. Snubber Surge Absorption & Overvoltage Spike Suppression Equipped with integrated RC and diode snubber circuits, this board absorbs extreme voltage spikes generated during the turn-on and turn-off of IGBTs or thyristors. It clamps surge voltages within a safe range to prevent overvoltage breakdown of power switching components and extend the service life of the drive’s power modules.
2. Auxiliary Drive for Power Semiconductors It works with the main trigger board to output auxiliary drive signals, stabilizing the gate drive voltage of power switches. The board optimizes the rise and fall slopes of switching actions to cut switching loss and heat generation, enabling the inverter to operate under continuous load reliably.
3. Voltage Balancing for Three-Phase Inverter Circuits It equalizes the voltage across each branch of the three-phase inverter bridge, preventing premature failure of individual power devices caused by uneven voltage division. It ensures symmetrical three-phase output current to eliminate motor vibration and abnormal noise.
4. Condition Sampling & Fault Feedback Built-in voltage and surge sampling circuits continuously monitor the operating status of snubber and power loops. If sustained overvoltage or snubber circuit failure is detected, the board sends fault feedback signals to the main control board to trigger emergency shutdown protection of the drive.
5. OEM Maintenance Spare Part for 1336 Series Drives As an original factory replacement PCB for A‑B 1336 inverters, it is used to repair failed inverter units when the original snubber drive board suffers aging, capacitor leakage or damaged absorption circuits. After replacement, the variable speed control function of fans, water pumps and conveyor systems can be fully restored.
6. Isolation Design for Anti-Interference Performance Isolation components on the board block electromagnetic interference transmitted from the high-voltage inverter circuit to the low-voltage main control board, avoiding distortion of sampling and communication signals and improving the drive’s stability in harsh industrial environments with dust and multiple adjacent motors.