A-B 1336-PB-SP21B Pre-charge circuit board

The Allen-Bradley 1336-PB-SP21B is a specialized spare part component designed for the 1336 PLUS, PLUS II, FORCE, and IMPACT series of Adjustable Frequency AC Drives. Specifically, it is a Gate Drive Power Board (often referred to as a Main Power Board or Gate Driver PCB).

This component serves as the critical interface between the drive's control logic and the power semiconductors (IGBTs), ensuring precise switching and motor control.

Product Specifications

Key Product Advantages

• OEM Precision: As an original factory replacement part, it ensures 100% compatibility with the drive's firmware and mechanical housing.

• Enhanced Reliability: Built with high-grade industrial capacitors and gate drivers to withstand the thermal stresses of high-frequency switching.

• Plug-and-Play Integration: Designed for rapid field replacement, minimizing downtime in critical industrial processes.

• Robust Protection: Includes integrated circuitry to monitor for over-current, short-circuit, and gate-level faults to protect the expensive IGBT modules.

Important Safety & Installation Precautions

Warning: Variable Frequency Drives (VFDs) contain high-voltage capacitors that can hold a lethal charge even after power is disconnected.

1. Discharge Time: Wait at least 5–10 minutes after removing power and verify that the DC Bus voltage is near zero with a multimeter before touching the board.

2. ESD Protection: This board is highly sensitive to Electrostatic Discharge (ESD). Always wear a grounded wrist strap during installation.

3. Correct Revision: Ensure the "SP" (Spare Part) number matches your drive's frame size and voltage rating exactly, as similar-looking boards are not interchangeable.

4. Check IGBTs: Before installing a new board, always test the IGBT power modules. A blown IGBT can instantly destroy a brand-new Gate Drive Board.

Product Applications

The 1336-PB-SP21B is utilized in heavy industrial environments where precise motor speed and torque control are required. Common applications include:

• Material Handling: Conveyor systems and automated sorting lines.

• Pumping & HVAC: Centrifugal pumps and large industrial fans.

• Manufacturing: Metal stamping, paper mills, and textile production machinery.

• Extruders: Providing steady torque for plastic and rubber processing.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapor

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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