component

MMSZ5261BT1G

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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MMSZ5261BT1G

onsemi · Zener Diodes · SOD-123

MMSZ5261BT1G 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 The cathode is marked by the polarity band on the package and is the Zener regulation terminal, with the device junction rated at a maximum of 150 °C (TJ, Tstg range −55 to +150 °C).
2 Anode passive The anode is the opposite terminal to the cathode, and the device is used as a Zener voltage regulator in reverse bias.

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 VZ 44.65 47 49.35 V @ IZT = 2.7 mA, TA = 25°C; 5% tolerance (B suffix) 3
Maximum Zener Impedance @ IZT ZZT 105 Ω @ IZT = 2.7 mA, IZ(AC) = 0.1 IZ(DC), f = 1 kHz 3
Maximum Zener Impedance @ IZK ZZK 1000 Ω @ IZK = 0.25 mA 3
Reverse Leakage Current @ VR IR 0.1 µA @ VR = 36 V 3
Forward Voltage @ IF VF 0.9 V @ IF = 10 mA (5% tolerance FG table header) 3
Total Power Dissipation on FR-5 Board PD 500 mW @ TL = 75°C, FR-5 board (Note 1) 1
Derating above 75°C PD 6.7 mW/°C Derated above 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: MMSZ5261BT1G
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: mmsz5261bt1g-etched.step / mmsz5261bt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmsz5261bt1g.step / mmsz5261bt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (8 pp, sha256 2711e46b01090f07, 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