ABB ZINT-571 3AUA0000077333 Power Board – Obsolete ACS800 Spare Part

Technical Dossier

Product Details And Specifications

ABB ZINT-571 3AUA0000077333 Power Board – Obsolete ACS800 Spare Part

When the ABB ACS800 series drive was designed into your production line, it was built to last decades. The ZINT-571 power board (part number 3AUA0000077333) is a core internal assembly within that drive platform — responsible for gate drive signal distribution and DC bus power conditioning. When this board fails, the drive does not run. There is no workaround, no bypass, and no software patch that substitutes for a functioning unit.

A full ACS800 drive replacement, including engineering re-commissioning, motor re-parameterization, and production downtime, routinely costs between USD $40,000 and $150,000 per line — before accounting for lost output. A single verified spare board changes that calculation entirely. DriveKNMS holds physical stock of the ZINT-571 3AUA0000077333. This is not a lead-time quote. This is available inventory.

Technical Specifications

Note: Electrical parameters specific to individual drive frame sizes are not published here to prevent misapplication. Please confirm your ACS800 frame size and firmware revision with our technical team before ordering.

Solving the Discontinued Hardware Crisis

ABB formally discontinued active production support for portions of the ACS800 platform. Spare board availability through official channels has become inconsistent, with lead times — when parts are available at all — stretching to 26–52 weeks. For a plant running continuous process operations, that timeline is not a procurement inconvenience. It is a production crisis.

The ZINT-571 board is not an isolated component. It sits within a control architecture that plant engineers spent years tuning — PID loops calibrated to specific process dynamics, motor parameters mapped to actual load curves, safety interlocks integrated with plant-wide SCADA. Replacing the ACS800 drive with a current-generation unit does not transfer that configuration automatically. It requires re-engineering. That re-engineering carries cost, risk, and the very real possibility of introducing new failure modes into a process that was previously stable.

Maintaining the existing ACS800 installation with verified spare boards is not a compromise. It is the lower-risk, lower-cost path — provided the spare parts are genuine and properly tested. That is the specific problem DriveKNMS exists to solve.

For plant managers facing pressure to modernize aging automation assets, the business case for a targeted spares strategy is straightforward: a verified ZINT-571 board at a fraction of the cost of drive replacement buys 5 to 10 additional years of stable operation from an asset that is already fully commissioned, fully tuned, and fully integrated into your process.

Condition & Reliability Assurance

Obsolete boards sourced from the secondary market carry real risk. Component aging, improper storage, and undisclosed prior damage are common. DriveKNMS applies a 5-step inspection protocol to every ZINT-571 unit before it leaves our facility:

Step 1 – Electrolytic Capacitor Assessment: Capacitors are the primary age-related failure point on power boards of this era. Each unit is inspected for bulging, electrolyte leakage, and ESR deviation from specification.

Step 2 – Firmware & EPROM Verification: Where applicable, onboard firmware versions are confirmed against known-good ACS800 compatibility matrices. Boards with corrupted or mismatched firmware are rejected.

Step 3 – Pin and Connector Inspection: All edge connectors and board-to-board interface pins are examined under magnification for oxidation, corrosion, and mechanical deformation. Affected contacts are treated or the unit is rejected.

Step 4 – Functional Power-On Test: Units are bench-tested under controlled conditions to verify basic power rail integrity and signal output behavior.

Step 5 – Anti-Static Packaging and Documentation: Each unit is packaged in ESD-safe materials with a condition report. Traceability documentation is provided on request.

Key Features for System Maintenance

The ZINT-571 3AUA0000077333 is a direct drop-in replacement for the original board position within the ACS800 drive chassis. Installation does not require drive re-parameterization, PLC program modification, or SCADA reconfiguration. The drive recognizes the replacement board through its existing hardware identification protocol.

This means your maintenance team can execute the replacement during a planned shutdown window — typically 2 to 4 hours — without involving the original system integrator, without a firmware upgrade project, and without the risk of configuration loss that accompanies a full drive swap. The engineering cost avoided is substantial. The production risk avoided is greater.

For facilities maintaining multiple ACS800 units across a site, holding two ZINT-571 boards as strategic spares eliminates the single-point-of-failure risk that a zero-stock position creates. The cost of two spare boards is a fraction of one hour of unplanned line downtime in most process industries.

FAQ

What warranty applies to an obsolete spare part?
DriveKNMS provides a 90-day functional warranty on tested refurbished units and a 180-day warranty on confirmed New Old Stock units. Warranty covers failure under normal operating conditions and excludes damage from installation error or electrical overstress.

How do I confirm the board is new or properly refurbished — not a field pull?
Every unit shipped by DriveKNMS is accompanied by a condition declaration. New Old Stock units are identified by original ABB packaging or verifiable date codes. Refurbished units include a test report summary. We do not ship field-pull boards without explicit disclosure and corresponding pricing.

Should I hold multiple units as long-term spares?
For any facility with more than two ACS800 drives in continuous service, holding a minimum of two ZINT-571 boards is a defensible maintenance strategy. Secondary market availability of this part will not improve over time. Current stock represents the most accessible and cost-effective procurement window. Once existing inventories are exhausted globally, sourcing becomes a project, not a purchase.

Can you source other ABB ACS800 boards or modules?
Yes. DriveKNMS specializes in obsolete and hard-to-find components across the ABB drive and automation portfolio. Contact us with your part number for a stock check.