Datasheet, 359 KB PDF, for the 40HFL series, filed under schematics. The 40HF designation refers to stud-mounted power rectifier diodes, and the L variant is generally a fast or soft-recovery version within that family; confirm the details on the sheet. It shows stud thread, polarity marking, voltage classes and recovery characteristics. Use it when identifying a stud diode in a charger, welder or industrial supply, checking polarity before mounting and selecting the correct voltage grade.
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