This read-only CucsEquipmentFexPsuInputStatsHistThresholded field is the 'thresholded' property of the 'FexPsuInputStatsHist' managed object in Cisco UCS Manager's equipment-inventory schema for the FEX (Fabric Extender) subsystem recording which of this PSU's fields had crossed a configured alarm threshold at the time this sample was archived. This preserves exactly which reading, current, voltage, or power, triggered the alarm at that past moment, which is what an admin needs when reconstructing the sequence of events during a post-incident review. A stored row with only the current bit set in Thresholded documents that an over-current condition, not a voltage or power issue, was what tripped the alarm during that incident.