Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Model | 1336-BDB-SP43D |
| Product Type | Gate Driver PC Board |
| Drive Family | 1336STEF |
| Voltage Class | 460 VAC |
| Power Rating | 300 HP |
| Frame | G-Frame |
| Primary Function | Gate-drive control for power devices |
| Quantity Required | 1 kit per drive |
| Related Earlier Versions | 1336-BDB-SP43A, 1336-BDB-SP43C |
| Replacement Status | SP43A/C replaced by SP43D |
| Drive Applications | 1336STEF and related 1336 drive configurations |
| Operating Temperature | 0°C to 50°C, per available technical listing |
| Storage Temperature | -40°C to 70°C |
| Relative Humidity | 5–95%, non-condensing |
| Installation Altitude | Up to 1,000 m, per available technical listing |
Rockwell’s published parts documentation specifically describes 1336-BDB-SP43D as a gate-driver PCB for 1336STEF, 460 V, 300 HP, G-Frame drives and shows one kit required per drive.
A separate technical listing identifies the same part as a 460 V, 300 HP G-Frame gate-driver board and gives the environmental figures above.
Application Scenarios & Pain Points
A 300 HP drive failure is rarely a convenient event. The motor may be tied directly to a production pump, compressor, fan, conveyor, or process train, and a failed drive can leave the entire production sequence waiting on one obsolete PCB.
Typical Applications
- Large Motor Drives: The SP43D is specified for 460 VAC, 300 HP, G-Frame 1336STEF applications.
- 1336 Legacy Drive Maintenance: Useful where the installed 1336 architecture remains operational and replacing the entire drive would require cabinet modification, motor-cable changes, or control-system rework.
- Drive Power-Stage Repair: The board is relevant when troubleshooting gate-control problems rather than replacing the complete inverter assembly.
- Emergency Spare Inventory: For plants with several compatible 1336 drives, holding a tested SP43D can be more practical than waiting for a board to be sourced after a production failure.
1336-BDB-SP43D
Field Case:
On a large motor drive, a gate-driver fault may appear alongside DC-bus or output-stage faults. Before condemning the PCB, technicians should inspect the power devices and gate-drive supply. A shorted switching device can damage a replacement board almost immediately after startup—an expensive repeat failure that looks, at first glance, like a bad replacement.
Related Products
- 1336-BDB-SP43A — Earlier revision of the SP43 gate-driver family. Rockwell’s parts documentation identifies it as obsolete and replaced by SP43D. Useful when identifying an original board during legacy repair.
- 1336-BDB-SP43C — Another earlier SP43 revision, also listed as obsolete and replaced by SP43D. Confirm the complete drive configuration before applying the later revision.
- 1336-BDB-SP44D — Gate-driver PCB for 1336STEF, 460 VAC, 350 HP, G-Frame drives. Same general function, but one power class above ; it is not a routine substitute.
- 1336-BDB-SP45D — Gate-driver PCB for 1336STEF, 460 VAC, 400 HP, G-Frame applications. Intended for a higher-power drive than .
- 1336-BDB-SP53D — Gate-driver PCB for 1336STEF, 460 VAC, 450 HP, G-Frame drives. It shares the G-Frame family but has a different power application.
- 1336-BDB-SP58D — Gate-driver PCB for a 1336STEF, 460 VAC, X250 HP, G-Frame application. It is relevant when comparing nearby G-Frame configurations, but should not be substituted without engineering confirmation.
- 1336-BDB-SP46D — Gate-driver PCB for 1336STEF, 460 VAC, 600 HP, G-Frame drives. Same board category, substantially different power requirement.
- 1336-BDB-SP73D — Gate-driver PCB for 1336STEF, 460 VAC, 300 HP, F-Frame applications. This is particularly important when comparing a 300 HP drive: identical horsepower does not make an F-Frame board interchangeable with the G-Frame .
The Engineer’s Guide: Field Pitfalls to Avoid
⚠️ 300 HP Does Not Mean Every 300 HP Gate Board Is Equivalent
The parts list distinguishes for a 300 HP G-Frame application from SP73D for a 300 HP F-Frame application.
How to avoid it: Match voltage + horsepower + frame + drive family + complete SP number. Do not approve a substitute because the horsepower happens to match.
⚠️ Check the Power Devices Before Energizing a Replacement PCB
The gate-driver board works directly with the drive’s switching section. A failed IGBT or associated gate circuit can cause a second board failure during startup.
How to avoid it: Isolate the drive, verify the DC bus has discharged, inspect the power semiconductors, check gate connections and driver supplies, and identify the original failure mechanism before applying power.
⚠️ Confirm the Actual Revision
Rockwell lists SP43A and SP43C as obsolete and replaced by .
How to avoid it: Photograph the existing PCB label before ordering. If the installed board is SP43A/C, verify the replacement against the exact drive catalog number and series.
Frequently Asked Questions (FAQ)
What is Allen-Bradley 1336-BDB-?
It is an Allen-Bradley gate-driver PCB for the 1336 drive family. Rockwell identifies it specifically for 1336STEF, 460 VAC, 300 HP, G-Frame applications.
Is 1336-BDB- a complete AC drive?
No. It is a board-level gate-driver assembly installed inside the drive. The main control electronics, power section, capacitors, and other drive assemblies remain separate components.
Can replace SP43C?
Rockwell’s spare-parts documentation identifies 1336-BDB-SP43A and SP43C as obsolete and replaced by .
That does not eliminate the need to verify the host drive. For an old installation, confirm the exact catalog number, frame, and drive revision before fitting the newer board.
Can I use 1336-BDB-SP73D for a 300 HP drive instead?
Not automatically. Both are associated with 300 HP applications, but is identified for G-Frame, while SP73D is identified for F-Frame.
Frame-specific power assemblies are a critical compatibility boundary.
What should I check when buying a refurbished ?
Ask for the actual board photographs and verify:
- 1336-BDB-SP43D marking
- Board revision
- Connector condition
- No burned gate-drive components
- No cracked solder joints or heavy oxidation
- Gate-drive functional test
- Power-stage compatibility
- Test report
- Warranty terms
For a 300 HP board, “powers up” is a weak acceptance criterion. A meaningful test should verify the gate-drive circuitry under an appropriate controlled test arrangement.
What environmental conditions are specified for this board?
Available technical data lists an operating range of 0°C to 50°C, storage from -40°C to 70°C, relative humidity of 5–95% non-condensing, and installation altitude up to 1,000 m.
These are useful procurement checks, but the host drive’s installation manual should govern the actual cabinet environment.
Is 1336-BDB- still available as a current OEM part?
It is a legacy/discontinued component. One technical listing records the manufacturer discontinuation date as March 31, 2020, while Rockwell’s parts documentation establishes as the later replacement for the obsolete SP43A/C versions.
For procurement, request the actual board revision and test evidence, not merely a statement that the part is “new.”
