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MMSZ5270BT1G

Public Made by Adom

by adom

onsemi Zener Diodes, SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MMSZ5270BT1G

onsemi · Zener Diodes · SOD-123

MMSZ5270BT1G from onsemi, in a SOD-123. 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 Cathode passive Cathode terminal, identified by the polarity band on the package (SOD-123 Style 1, pin 1 = cathode).
2 Anode passive Anode terminal (SOD-123 Style 1, pin 2 = anode); the device is rated for 500 mW total power dissipation on an FR-5 board with TL = 75°C, derated 6.7 mW/°C above 75°C.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOD-123
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
Reverse Zener Voltage @ IZT (min/nom/max) VZ 86.45 91 95.55 V @ IZT = 1.4 mA, TA = 25°C; MMSZ5270BT1G row of 5% table 3
Zener voltage tolerance, B suffix (standard) VZ -5 5 % B suffix standard tolerance on nominal Zener voltage (Note 3) 3
Maximum Zener Impedance @ IZT ZZT 400 @ IZT = 1.4 mA 3
Maximum Zener Impedance @ IZK ZZK 2300 @ IZK = 0.25 mA 3
Reverse Leakage Current @ VR IR 0.1 @ VR = 69 V 3
Total Power Dissipation on FR-5 Board PD 500 mW FR-5 board (Note 1), TL = 75°C 1
Thermal Resistance, Junction-to-Ambient RJA 340 °C/W Note 2 (infrared scan method) 1
Thermal Resistance, Junction-to-Lead RJL 150 °C/W Note 2 (infrared scan method) 1
Junction and Storage Temperature Range TJ, Tstg -55 150 °C 1

CAD (KiCad official)

  • Symbol: MMSZ5270BT1G
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mmsz5270bt1g-etched.step / mmsz5270bt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5270bt1g.step / mmsz5270bt1g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (8 pp, sha256 074f329af8648e36, retrieved 2026-10-18, 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