ABB TSTFU3P-BP Circuit Board

ABB TSTFU3P-BP is a 400‑460 V, 5 A three‑phase drive control main board used in industrial motor drives and automation systems. Common failure modes include burnt or damaged MOSFETs/IGBTs, degraded gate driver ICs, and overheating of the power module due to inadequate cooling or overcurrent conditions; capacitors on the high‑voltage side often fail under vibration or thermal cycling. Initial diagnostics should verify input voltage integrity, check for visible burn marks or cracked components on the board, and confirm that all gate drivers and MOSFETs are within spec using a multimeter and oscilloscope; also review any error codes from the drive controller for indications of phase loss or overtemperature events.[oss-gpt-20b]

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