What the ratings mean for fit
The 386107604: The 10 A per circuit rating is the primary selection gate — this is a power-class barrier block, not a signal-level part. The 300 V rating covers standard industrial AC and DC branch circuits at that current. The dual-wall (2-wall) barrier construction provides two physical insulating walls between adjacent circuits, which matters when the panel voltage is pushing toward the 300 V ceiling and creepage distance is a checklist item. The flange feature is the differentiating physical detail — it gives a mounting boss for a fastener through the panel, which keeps the block from rotating under cable pull or vibration. For a terminal strip used as a field-wiring entry point inside an enclosure, that rotation resistance is usually the reason the flange was specified over a plain-stack variant of the same series.