Allen-Bradley 1336-BDB-SP6A Maintenance-Proven Spare Part

Overview

Allen-Bradley 1336-BDB-SP6A Maintenance-Proven Spare Part for Factory Uptime

The Allen-Bradley 1336-BDB-SP6A is an original IGBT Gate Driver Board engineered for the 1336 PLUS and 1336 PLUS II series AC variable frequency drives. As a critical power electronics interface component, this board governs the switching signals delivered to the IGBT power module stack, directly controlling motor torque, speed ramp profiles, and drive protection response. In industrial environments where continuous production is non-negotiable — food processing lines, water treatment facilities, material handling conveyors, and HVAC plant rooms — a failed gate driver board translates immediately into unplanned downtime and lost throughput.

Sourced as an original Allen-Bradley spare, the 1336-BDB-SP6A is tested prior to shipment and backed by a support terms confirmed by quotation. Each unit undergoes functional verification to confirm gate signal integrity, isolation resistance, and thermal performance before dispatch. Procurement teams can rely on documented traceability and consistent lead times, reducing the risk of counterfeit components entering critical control cabinets.

Spare Maintenance Table

Maintenance Planning for Continuous Operation

When a 1336-BDB-SP6A gate driver board fails or shows signs of degradation, experienced maintenance engineers know that the fault rarely exists in isolation. A thorough site inspection should extend to the surrounding drive components and control circuit to prevent repeat failures and confirm system integrity before restart.

Begin with the 1336-MOD-L2E Power Interface Module — the DC bus and pre-charge circuit feeding the IGBT stack. A weakened pre-charge resistor or bus capacitor bank can generate voltage spikes that stress the gate driver beyond its design limits. Inspect the 1336-BDB-SP2A or SP4A gate driver variants if the drive frame size differs from the SP6A application; cross-referencing the correct board revision against the drive nameplate prevents mismatched gate timing.

The 1336 PLUS control board (1336-L4E or equivalent) communicates fault and reference signals to the gate driver via the internal ribbon interface. A corroded or intermittently seated connector on this interface can mimic gate driver failure; clean and reseat all internal connectors before condemning the SP6A board. Similarly, the 1336-GM1 or GM3 I/O expansion modules should be checked for correct 24 VDC logic supply, as logic undervoltage can cause spurious gate inhibit signals.

For drives installed in dusty or humid environments, inspect the 24 VDC SMPS internal power supply board for electrolytic capacitor bulging or output voltage drift — a degraded internal supply is a common root cause of gate driver instability. Where the 1336 PLUS communicates over DeviceNet or DH-485, verify the 1336-GM6 communication adapter is seated correctly and that network termination resistors are intact; communication faults during a drive restart can mask underlying hardware issues.

Finally, review the input line fuses and MOV surge suppressors on the incoming power terminals. A single-phase loss event or transient overvoltage that triggered the original gate driver failure may have also degraded the MOV protection network, leaving the replacement board exposed to the same fault condition.

Site Replacement Workflow

Before beginning any replacement of the 1336-BDB-SP6A, isolate the drive from mains power and allow a minimum of five minutes for DC bus capacitors to discharge to safe levels — verify with a calibrated multimeter across the DC bus terminals before touching internal components.

Document the existing drive parameter set using RSLogix or DriveExplorer software prior to board removal. The 1336 PLUS stores parameters in non-volatile memory on the control board, but a pre-maintenance parameter backup eliminates recovery time if a control board reset occurs during the repair. Remove the gate driver board by releasing the retention clips and disconnecting the gate signal ribbon cable and isolated power connector. Note the orientation of all connectors — incorrect reinsertion of the gate signal cable will prevent the drive from enabling and may generate a non-descriptive fault code.

Install the replacement 1336-BDB-SP6A, reconnect all internal cables, and perform a no-load power-up test before reconnecting the motor. Monitor the drive display for F005 (IGBT overcurrent), F012 (gate driver fault), and F024 (hardware fault) during the initial energisation sequence. If the drive powers up cleanly, perform a low-speed jog test under no load, then progressively load the motor to confirm stable operation across the full speed range. This staged commissioning approach reduces the risk of a repeat fault and confirms compatibility before returning the machine to production.

For legacy 1336 PLUS installations approaching end-of-life, consider stocking a minimum of two 1336-BDB-SP6A boards per site alongside a matched control board and power supply board. This three-component spare kit covers the majority of field-repairable drive failures and supports a mean-time-to-repair of under two hours for trained technicians.

Spare Parts Support FAQ

Q1: Is the 1336-BDB-SP6A compatible with both 1336 PLUS and 1336 PLUS II drives?
Yes. The SP6A gate driver board is designed for use across the 1336 PLUS and 1336 PLUS II drive families in the applicable frame size range. Always verify the drive nameplate frame designation and cross-reference the Allen-Bradley spare parts catalogue or the drive’s internal parts list before ordering to confirm the correct board revision for your specific unit.

Q2: How is the 1336-BDB-SP6A tested before shipment?
Each board undergoes pre-shipment functional testing covering gate signal output integrity, isolation resistance between the control and power stages, and supply voltage regulation. Test records are retained and can be provided upon request. The support terms confirmed by quotation cover defects in materials and workmanship under normal operating conditions.

Q3: What is the recommended spare parts stocking strategy for 1336 PLUS drives?
For facilities operating multiple 1336 PLUS drives, a tiered stocking approach is recommended: hold at least one 1336-BDB-SP6A gate driver board and one internal power supply board per drive family on-site for immediate response, and maintain a secondary stock at a regional warehouse or with a trusted distributor for replenishment within 48–72 hours. This strategy balances carrying cost against the financial impact of extended unplanned downtime.

Q4: Can you support long-term supply of the 1336-BDB-SP6A for ongoing maintenance contracts?
Yes. We support long-term supply agreements for the 1336-BDB-SP6A and related 1336 PLUS spare components. Blanket purchase orders, scheduled delivery programmes, and consignment stock arrangements are available for maintenance contractors and OEMs managing large installed bases of Allen-Bradley drives. Contact our team to discuss volume pricing and supply continuity terms.

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Product Identification

Brand / Ecosystem

Allen-Bradley
Allen-Bradley

Model / Series

1336-BDB-SP6A

Product Family

Variable Frequency Drives

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Drive range

AC drives, VFDs and accessories

Common needs

Voltage, kW/HP and load type

Project support

Motor control, energy saving and spares

Inquiry Support

• Input/output voltage and kW/HP confirmation
• Energy-saving motor control inquiry
• Accessory and spare-unit support

What to Send Us

• Brand and exact model number: Allen-Bradley 1336-BDB-SP6A
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference