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SZMM3Z51VT1GX

Public Made by Adom

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Nexperia Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SZMM3Z51VT1GX

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); szmm3z51vt1gx.step / szmm3z51vt1gx.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF