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LMSZ5258BT1G

Public Made by Adom

by adom

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

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LMSZ5258BT1G

LRC · Zener Diodes · SOD-123

LMSZ5258BT1G from LRC, 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 of the Zener diode, identified on the package by the polarity band; the datasheet gives no separate electrical limit for this pin beyond the device maximum ratings (for example 500 mW total power dissipation on FR-5 board and junction/storage range of -55 to +150 °C).
2 Anode passive Anode terminal of the Zener diode, opposite polarity to the cathode band; the datasheet gives no separate electrical limit for this pin beyond the device maximum ratings.

Key specifications

Parameter Value
Manufacturer LRC
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 VZ 34.2 36 37.8 V @ IZT = 3.4 mA; TA = 25°C unless otherwise noted 3
Reverse Leakage Current IR 0.1 A @ VR = 27 V 3
Maximum Zener Impedance ZZT 70 @ IZT = 3.4 mA 3
Maximum Zener Impedance ZZK 700 @ IZK = 0.25 mA 3
Forward Voltage VF 0.9 V @ IF = 10 mA 2
Zener voltage tolerance (standard) VZ -5 5 % Note 3: standard tolerance on nominal Zener voltage 3
Total Power Dissipation on FR-5 Board PD 500 mW Note 1; @ TL = 75°C 1
Derating above 75°C PD 6.7 mW/°C Derated above 75°C 1
Thermal Resistance, Junction-to-Ambient RJA 340 °C/W Note 2 1
Thermal Resistance, Junction-to-Lead RJL 150 °C/W Note 2 1
Junction and Storage Temperature Range TJ, Tstg -55 150 °C 1
ESD rating, Human Body Model 16 kV Human Body Model; Class 3 (printed as >16 kV) 1

CAD (KiCad official)

  • Symbol: LMSZ5258BT1G
  • Footprint: Diode_SMD:D_SOD-123F
  • 3D model: SOD-123 (KiCad packages3D, STEP)
  • 3D model files: lmsz5258bt1g-etched.step / lmsz5258bt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lmsz5258bt1g.step / lmsz5258bt1g.glb are the bare package body.

Provenance

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

  • Datasheet: LRC datasheet (6 pp, sha256 9dcd48ce1826b714, retrieved 2026-10-19, 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