BZT52C5V1

@@ -0,0 +1,45 @@+# BZT52C5V1++**Diodes Incorporated** · Zener diode · SOD-123++500 mW surface-mount silicon planar Zener diode with a nominal 5.1 V breakdown, in a SOD-123 package. The Zener voltage is 4.8-5.4 V at a 5 mA test current, and the cathode band marks polarity. Used for voltage clamping, simple shunt references, and rail protection. Reverse-biased above Vz it conducts and holds the voltage; forward drop is 0.9 V.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | K | passive | Cathode of the Zener diode. Marked by the cathode band on the SOD-123 package top. Reverse-breakdown at nominally 5.1 V (4.8–5.4 V) when biased more positive than the anode by Vz; test current Izt = 5 mA, Zzt = 60 Ω, Ir ≤ 2.0 µA @ Vr = 2.0 V. |+| 2 | A | passive | Anode of the Zener diode. Forward voltage Vf = 0.9 V @ If = 10 mA; typical Zener operation reverse-biases anode negative with respect to cathode. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Zener diode (silicon planar) |+| Zener voltage (Vz) | 5.1 V nominal (4.8-5.4 V @ Iz = 5 mA) |+| Power dissipation | 500 mW |+| Test current (Iz) | 5 mA |+| Forward voltage (Vf) | 0.9 V |+| Package | SOD-123 |+| Body (L×W×H) | 2.65 × 1.55 × 1.35 mm |++## Ordering variants++- `BZT52C5V1-7-F (SOD-123, 7" reel)`+- `BZT52C5V1-13-F (SOD-123, 13" reel)`++## CAD (KiCad official)++- Symbol: `Device:D_Zener`+- Footprint: `Diode_SMD:D_SOD-123`+- 3D model: SOD-123 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/ds18004.pdf) (5 pp, sha256 `0fbd7d137524820f`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/bzt52c5v1-datasheet.pdf)

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