Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Model | 1336-BDB-SP39D |
| Product Type | Gate Driver PC Board |
| Drive Family | 1336STEF |
| Drive Voltage Class | 460 VAC |
| Motor Power Rating | 250 HP |
| Board Revision | Series D |
| Function | IGBT gate drive |
| Installation | Internal 1336 drive assembly |
| Power Distribution | Internal PCB bus |
| Control Connection | Internal ribbon/jumper connections |
| Power Input Point | TB1 |
| Assembly Level | Major drive PCB assembly |
| Related OEM Identifier | 74101-169-82 |
| Status | Legacy / discontinued |
Rockwell’s official 1336 spare-parts documentation identifies 1336-BDB-SP39D as the PCB, Gate Driver, 1336STEF, 460V, X250 HP category, with the earlier SP39A/C versions listed as obsolete and replaced by SP39D.
Independent technical listings identify the SP39D specifically as a 460 VAC, 250 HP gate-driver board and associate it with the 1336STEF drive.
Application Scenarios & Pain Points
When a 250 HP drive trips unexpectedly, replacing the main control board first is often the wrong move. The gate-driver PCB is directly involved in commanding the power-switching devices, so symptoms such as drive faults, loss of output, or abnormal switching can require examination of this board alongside the IGBT power section.
Typical Applications
- Large AC Motor Drives: Used inside 460 VAC-class Allen-Bradley 1336STEF drives serving motors up to 250 HP.
- Heavy Industrial Machinery: Appropriate for legacy high-power motor-control installations where the existing 1336 drive remains in service.
- Drive Repair: Particularly valuable when the power stage is serviceable but the gate-control electronics have failed.
- Legacy Spare Strategy: A tested SP39D can be held as a maintenance spare for older 1336 installations, reducing the risk associated with a drive failure on a production motor.
Field Case:
A drive can show a switching-related fault without having a completely failed gate-driver PCB. A damaged IGBT, gate-drive supply problem, connector issue, or shorted power section can produce similar symptoms. Before installing a replacement board, check the associated power devices and gate-drive circuitry rather than treating the PCB as an isolated component.
1336-BDB-SP39D
Related Products
- Allen-Bradley 1336-BDB-SP39A/C — Earlier revisions of the same gate-driver part family. Rockwell’s spare-parts documentation lists these versions as obsolete and identifies 1336-BDB-SP39D as the replacement.
- Allen-Bradley 1336-BDB-SP38D — Gate-driver PCB for 1336STEF, 460 VAC, 200 HP applications. Same general function, but the lower power rating makes it unsuitable as a direct substitute for a 250 HP drive.
- Allen-Bradley 1336-BDB-SP37D — Gate-driver PCB for 1336STEF, 460 VAC, 150 HP drives. Similar architecture, different power application.
- Allen-Bradley 1336-BDB-SP56D — Gate-driver PCB for 1336STEFR, 460 VAC, X150 HP applications. The STEFR drive family distinction matters when determining compatibility.
- Allen-Bradley 1336-BDB-SP57D — Gate-driver PCB for 1336STEF, 460 VAC, X40 HP and above applications as specified in the Rockwell spare-parts listing; verify the exact drive catalog number before substitution.
- Allen-Bradley 1336 Main Control Board — The control board handles drive logic and regulation, while the SP39D specifically handles the gate-drive function. They are complementary rather than interchangeable assemblies.
- Allen-Bradley 1336 Power Module / IGBT Assembly — The gate-driver board commands the power-switching devices; a damaged IGBT assembly can also cause gate-drive-related faults, so both sections should be checked during repair.
The Engineer’s Guide: Field Pitfalls to Avoid
⚠️ Do Not Mix 150 HP, 200 HP, and 250 HP Gate-Driver Boards
The 1336-BDB family uses different SP numbers for different drive power ratings. Rockwell’s documentation distinguishes SP37D, SP38D, and SP39D by drive horsepower.
How to avoid it: Match the complete drive catalog number, voltage class, horsepower, and board part number before installation. Do not select a board based only on physical dimensions.
⚠️ Inspect the IGBT Power Stage Before Installing a Replacement
A failed IGBT can damage or overload the gate-driver circuitry. Installing another board without finding the original fault may result in another immediate failure.
How to avoid it: Check the power devices, gate-drive supply, insulation condition, gate-to-emitter behavior, and associated wiring before energizing the repaired drive.
⚠️ Verify Revision and Board Identification
The SP39A/C versions were superseded by .
How to avoid it: Photograph the existing board label, revision marking, connectors, and internal drive identification before ordering. For a refurbished unit, request photographs of the actual PCB rather than relying on a generic product image.
Frequently Asked Questions (FAQ)
What is Allen-Bradley 1336-BDB-?
It is a gate-driver PC board for Allen-Bradley 1336STEF AC drives. The documented application is 460 VAC and 250 HP, with the board providing the gate-drive function associated with the drive’s power-switching stage.
What drive does 1336-BDB- fit?
The documented application is the 1336STEF, 460 VAC, 250 HP class. Rockwell’s parts documentation should be used as the primary reference when matching the board to a particular drive catalog number.
Can 1336-BDB-SP38D replace 1336-BDB-?
No—not as a routine substitution. The Rockwell parts list identifies SP38D for 200 HP 460 V 1336STEF applications, while is associated with the 250 HP class.
The power-stage and gate-drive requirements are different enough that the part number should be matched to the drive rather than selected by physical similarity.
Is still manufactured?
Available distributor documentation identifies the part as discontinued, while Rockwell’s older spare-parts documentation identifies the as the replacement for earlier SP39A/C versions.
For procurement, that means revision and condition deserve particular attention. A surplus or refurbished board should be traceable to the correct drive application.
What should I check before installing a refurbished ?
At minimum:
- Confirm the drive is the correct 460 VAC / 250 HP application.
- Verify the exact PCB part number and revision.
- Inspect ribbon cables and internal connectors.
- Check the gate-drive power supply.
- Test the associated IGBT/power stage.
- Inspect for burned components, cracked solder joints, contamination, or oxidation.
- Verify the replacement board under controlled conditions before returning the drive to production.
Is the same as 74101-169-82?
Available product documentation identifies 74101-169-82 as an equivalent identifier for the gate-driver assembly.
For purchasing, provide both identifiers when possible and ask for a photograph of the actual nameplate/PCB marking. That reduces the chance of receiving a visually similar 1336 gate-driver board intended for a different horsepower class.
