The ABB YXU173E YT204001-JK is a pulse transformer unit used in compatible legacy ABB TYRAK DC drive and thyristor-converter assemblies. It interfaces the converter control electronics with the firing-pulse circuits, supporting isolated transmission of trigger pulses to the thyristor power stage. The YXU173E YT204001-JK is intended for exact-model replacement, converter refurbishment and lifecycle maintenance where YXU 173E hardware is specified.

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