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Product Overview
The ABB 1SFB536068D1011 is a main electronic control board used in ABB PST/PSTB series soft starters. Industrial spare-parts references identify it as a motherboard or main control card, with one listing specifically associating it with the PSTB570-600-70 soft starter. The board acts as the central electronic control element for the starter, processing control signals and managing the semiconductor switching required for controlled motor acceleration. It is designed for panel-mounted soft-starter assemblies rather than general-purpose PLC applications.
The board is also listed as discontinued by some industrial-part suppliers, making exact spare identification particularly important for legacy PST/PSTB installations. Personally, I would verify the complete soft-starter type, hardware revision, connector layout, and programmed configuration before replacing the original board.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 1SFB536068D1011 |
| Manufacturer | ABB |
| Product Type | Soft Starter Main Control Board |
| Application | ABB PST / PSTB Series Soft Starters |
| Primary Function | Motor soft-start control and system processing |
| Main Circuit Application | Low-voltage motor starting; application dependent |
| Control Power | Board/system dependent |
| Communication / Protocol | Soft-starter control interface; optional fieldbus dependent |
| Mounting | Internal panel-mounted soft starter |
| Dimensions (HxWxD) | Approx. 203.2 × 635 × 330.2 mm in one supplier listing; verify actual board dimensions |
| Weight | Approx. 0.23 kg net according to one listing |
| Typical Interfaces | Control wiring, relay interface, keypad/fieldbus-related connections |
| Special Features | On-board battery and transformer; 5 VDC relay output reported by secondary listing |
| Status | Discontinued according to some aftermarket references |
Available supplier data is inconsistent on physical dimensions, which may reflect packaged or complete-assembly measurements rather than the PCB itself. The most reliable procurement identifier remains the complete ABB part number and the installed soft-starter model.
ABB 1SFB536068D1011
Key Features and Benefits
- Main control electronics for compatible ABB PST/PSTB soft starters.
- Processes control commands and operating feedback required for controlled motor starting.
- Supports the soft-start function that limits starting stress on the motor and electrical system.
- Intended for industrial low-voltage motor-control applications.
- Suitable for replacement of failed controller electronics in established soft-starter installations.
- Useful as a lifecycle spare for older PST/PSTB equipment where original electronics remain in service.
- Exact board revision matching helps reduce commissioning and compatibility problems.
The board has been described as the control “brain” of the PSTB family, with control processing associated with the thyristor firing circuitry. Secondary references also associate the broader PSTB range with motor applications from approximately 200 to 690 VAC, although the correct rating depends on the specific soft-starter model.
Related Models
1SFB536068D1013: Closely numbered ABB soft-starter control-board variant. The different suffix indicates a different hardware configuration, so direct substitution should be confirmed before ordering.
1SFB536068D1001: Another ABB soft-start control-board part appearing in the same product family. It should be matched to the appropriate PST/PSTB hardware revision.
1SFB536068D1003: Related soft-starter electronics reference used within ABB’s PST/PSTB spare-parts family. Exact compatibility depends on the installed starter.
1SFB536068D1021: Another nearby control-board reference for ABB soft-start equipment. It is not automatically interchangeable with the supplied part number.
Installation and Maintenance
Before replacement, isolate the soft starter and follow the applicable electrical safety procedures. Record the complete soft-starter type, board revision, connector positions, jumper or configuration settings, and any keypad or fieldbus configuration.
Inspect the replacement PCB for signs of corrosion, thermal damage, cracked solder joints, or damaged connectors. Where a programmed board is supplied, confirm that its software or configuration matches the target starter before commissioning.
After installation, verify controller startup, diagnostic indications, command response, motor-start sequence, bypass operation, and protective functions under controlled conditions. Do not return a repaired or replacement soft starter to full production load until the relevant electrical and functional checks have been completed.
For inventory storage, use ESD-safe packaging and maintain the full ABB identification label with the spare. Because this assembly is associated with legacy PST/PSTB equipment, revision traceability is particularly valuable.
Product Warranty
Warranty depends on supplier condition and test status. New, surplus, refurbished, and rebuilt units may carry substantially different coverage, so purchasing records should state the exact ABB part number, condition, testing performed, and warranty period.
For ABB 1SFB536068D1011, the critical acceptance checks are exact part-number verification, compatible PST/PSTB soft-starter application, hardware revision, and successful functional testing before installation.
