component
LMSZ5259BT1G
Public Made by Adomby adom
LRC Zener Diodes, SOD-123. 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
markdownLMSZ5259BT1G
LRC · Zener Diodes · SOD-123
LMSZ5259BT1G 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 (datasheet pinout: PIN 1 CATHODE). |
| 2 | ANODE | passive | Anode terminal of the Zener diode, opposite the cathode polarity band (datasheet pinout: PIN 2 ANODE). |
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 |
|---|---|---|---|---|---|---|---|
| Zener voltage, minimum | VZ | 37.05 | V | @ IZT = 3.2 mA, TA = 25°C | 3 | ||
| Zener voltage, maximum | VZ | 40.95 | V | @ IZT = 3.2 mA, TA = 25°C | 3 | ||
| Zener voltage, nominal | VZ | 39 | V | Nominal, measured at TL = 30°C ±1°C (Note 4) | 3 | ||
| Maximum Zener impedance | ZZT | 80 | Ω | @ IZT = 3.2 mA, AC 1 kHz, IZ(AC) = 0.1 IZ(DC) (Note 5) | 3 | ||
| Maximum Zener impedance | ZZK | 800 | Ω | @ IZK = 0.25 mA, AC 1 kHz, IZ(AC) = 0.1 IZ(DC) (Note 5) | 3 | ||
| Forward voltage | VF | 0.9 | V | @ IF = 10 mA | 3 | ||
| Zener voltage tolerance on nominal | VZ | -5 | 5 | % | Standard tolerance on nominal Zener voltage (Note 3) | 3 | |
| Total power dissipation on FR-5 board | PD | 500 | mW | FR-5 board (Note 1), @ TL = 75°C | 1 | ||
| Derating of total power dissipation | 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 | ||
| Reverse leakage current | IR | 0.1 | A | @ VR = 30 V | 3 |
CAD (KiCad official)
- Symbol:
LMSZ5259BT1G - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files:
lmsz5259bt1g-etched.step/lmsz5259bt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmsz5259bt1g.step/lmsz5259bt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LRC datasheet (7 pp, sha256
f2a8a3c97b4fa9de, retrieved 2026-10-18, 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).