Allen-Bradley 1336-BDB-SP29D Obsolete Drive Board Stocked for Legacy 1336 Drive Fleets

Product Overview

The Allen-Bradley 1336-BDB-SP29D is a printed circuit board gate drive assembly used inside Rockwell Automation’s 1336 family of adjustable-frequency AC drives, where it serves as the critical interface between the drive’s low-voltage control logic and the high-power IGBT modules of the inverter section. Its job is to take the pulse-width modulated firing commands produced by the drive regulator and convert them into high-current, precisely timed gate pulses capable of charging and discharging IGBT gate capacitance fast enough to switch cleanly, which is what determines whether the drive can synthesise a smooth motor waveform or one that wastes energy and stresses the motor.Rated for the 460 V AC voltage class at up to 75 HP (approximately 55 kW) and built for Frame D drives, the Allen-Bradley 1336-BDB-SP29D is carried in Rockwell’s spare-parts matrix under the cross-reference part number 74101-169-53 and is compatible with the 1336 PLUS, PLUS II, FORCE, IMPACT and REGEN product lines. It is the current revision of the SP29 series, superseding the earlier SP29A and SP29C boards, and it integrates the gate drive stage, isolated power supplies, feedback signalling and protection circuitry on one assembly so the power stack needs no separate driver cards.Because the board sits electrically between control and power, the Allen-Bradley 1336-BDB-SP29D also carries the protection duties that keep an IGBT failure from becoming a catastrophic one: reinforced galvanic isolation, IGBT desaturation detection, under-voltage lockout and short-circuit handling are all implemented on board. Production of the 1336 platform has ended, so the Allen-Bradley 1336-BDB-SP29D is today supplied as new-surplus or tested stock for repair, refurbishment and strategic spares on installed drives.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	1336-BDB-SP29D
Alternative Part Number	74101-169-53
Manufacturer	Allen-Bradley / Rockwell Automation, USA
Product Type	PCB gate drive board (base drive board) for the inverter power stage
Compatible Drive Series	1336 PLUS, 1336 PLUS II, 1336 FORCE, 1336 IMPACT, 1336 REGEN
Drive Voltage Class	460 V AC, three-phase
Power Rating	Up to 75 HP (approximately 55 kW)
Frame Size	Frame D (series listings also cover A–E depending on configuration)
Input Signal	Low-voltage PWM gate firing commands from the drive regulator/control board
Output	High-current gate drive pulses to six IGBT devices (three-phase upper and lower bridge)
Gate Drive Channels	6 independent channels
Isolation	Reinforced galvanic isolation between control electronics and high-voltage DC bus
Protection Functions	IGBT desaturation (DESAT) detection, short-circuit protection, over-current, over-voltage, surge suppression, under-voltage lockout (UVLO)
Board Substrate	FR4 epoxy glass laminate, multilayer construction
Interface Connectors	Ribbon/flat cable headers and card-edge connectors for power and signal
Operating Temperature	0 °C to +50 °C
Storage Temperature	−40 °C to +85 °C
Relative Humidity	5 to 95 %, non-condensing
Shock Withstand	15 G at 11 ms
Vibration Withstand	Up to 5 G
Dimensions (L × W × H)	39.3 × 24.4 × 4 cm
Weight	Approximately 1.26 kg
Compliance	UL, CE, RoHS as part of the 1336 drive system
Lifecycle Status	Discontinued / obsolete, supported through installed-base spares

Main Features and Advantages

Precision switching with protective intelligence: The Allen-Bradley 1336-BDB-SP29D generates the high-current pulses needed to drive IGBT gates hard and fast, producing clean switching transitions that minimise switching losses and electromagnetic interference. Its most important protection is desaturation detection: the board monitors the collector-emitter voltage of each IGBT while it is conducting, and if an over-current or short-circuit pulls the device out of saturation, the board detects the voltage rise and commands a controlled soft shutdown before the power module is destroyed. Given that an IGBT stack costs many times more than the driver board, this function pays for itself the one time it is needed.Reinforced isolation for a harsh electrical environment: Mounted inside the power stack alongside the IGBTs, the board is exposed to the full noise and transient energy of the DC bus. The Allen-Bradley 1336-BDB-SP29D provides reinforced galvanic isolation so that high-voltage transients cannot propagate back into the sensitive control electronics, and its isolated DC/DC converters supply the floating gate drive rails each upper-bridge device requires.Revision-matched, drop-in serviceability: The 1336 platform uses revision-specific base drive boards, and the SP29D is the current successor to the SP29A and SP29C variants. Fitting the Allen-Bradley 1336-BDB-SP29D to a matching drive is a straightforward board swap with no mechanical modification, no rewiring and no firmware work, which is exactly what maintenance teams need during a shutdown window. Industrial-grade FR4 construction, a 15 G shock rating and 5 G vibration tolerance suit steel mills, mines, water treatment plants and material handling installations where drives live in demanding conditions.Lifecycle protection for legacy assets: With the 1336 family discontinued, the Allen-Bradley 1336-BDB-SP29D is often the difference between repairing a drive in days and replacing an entire drive train. Keeping one on the shelf converts an unplanned failure into a controlled, same-shift intervention.