1N5251B
by ST(先科)
The 1N5251B is a Zener diode from ST(先科), used in voltage reference, shunt regulation, and clamping circuits. It is a polarized device, so the symbol connections and physical orientation matter when moving from schematic to board. This record uses a through-hole DO-35 package with an axial lead arrangement. Its downloadable library contains a two-pin KiCad symbol and the DO-35_BD2.0-L4.2-P8.20-D0.5-RD footprint with two pads, together with a 3D model. Conversion originated from a real ProtoFlow import and was checked in the editor. For placement and routing, the part can be opened directly in ProtoFlow.
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