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SZMM3Z51VT1GX
Public Made by Adomby adom
Nexperia Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSZMM3Z51VT1GX
Nexperia · Zener Diodes · SOD-323
SZMM3Z51VT1GX from Nexperia, in a SOD-323. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode, marked by the bar on the package; the datasheet specifies the marking bar as the cathode indicator. |
| 2 | A | passive | Anode of the Zener diode; the datasheet gives no separate electrical limit for this pin beyond the device ratings (for example IF max 200 mA and Ptot max 300 mW). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-323 |
| Category | Diodes |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Forward current | IF | 200 | mA | 3 | |||
| Non-repetitive peak reverse power dissipation | PZSM | 40 | W | tp = 100 µs; square wave; Tamb = 25 °C; prior to surge | 3 | ||
| Total power dissipation | Ptot | 300 | mW | Tamb = 25 °C | 3 | ||
| Junction temperature | Tj | 150 | °C | 3 | |||
| Ambient temperature | Tamb | -55 | 150 | °C | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Thermal resistance from junction to ambient | Rth(j-a) | 415 | K/W | in free air; device mounted on FR4 PCB | 3 | ||
| Thermal resistance from junction to solder point | Rth(j-sp) | 110 | K/W | soldering point of cathode tab | 3 | ||
| Forward voltage | VF | 0.9 | V | IF = 10 mA; pulse test tp ≤ 300 µs; δ ≤ 0.02 | 3 | ||
| Forward voltage | VF | 1.1 | V | IF = 100 mA; pulse test tp ≤ 300 µs; δ ≤ 0.02 | 3 | ||
| Working voltage (51V type) | VZ | 48 | 54 | V | Tj = 25 °C | 5 | |
| Differential resistance (51V type) | rdiff | 0.05 | Ω | Tj = 25 °C | 5 | ||
| Temperature coefficient (51V type) | SZ | 46.6 | 57.2 | mV/K | IZ = 2 mA | 5 | |
| Reverse current (51V type) | IR | 400 | µA | IZ = 0.5 mA; VR = 35.7 V | 5 | ||
| Reverse current (51V type) | IR | 180 | µA | IZ = 2 mA; VR = 35.7 V | 5 | ||
| Diode capacitance (51V type) | Cd | 40 | pF | f = 1 MHz; VR = 0 V | 5 |
CAD (KiCad official)
- Symbol:
SZMM3Z51VT1GX - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
szmm3z51vt1gx-etched.step/szmm3z51vt1gx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);szmm3z51vt1gx.step/szmm3z51vt1gx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (12 pp, sha256
97ec17023363288c, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).