component
BZX84B12LT1G
Public Made by Adomby adom
onsemi Zener Diodes, SOT-23. 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
markdownBZX84B12LT1G
onsemi · Zener Diodes · SOT-23
BZX84B12LT1G from onsemi, in a SOT-23. 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 | ANODE | passive | Anode terminal of the Zener diode; the cathode is identified by the polarity band on the package. |
| 2 | NO CONNECTION | unconnected | Pin 2 is not connected internally and is listed as No Connection in the datasheet pinout. |
| 3 | CATHODE | passive | Cathode terminal of the Zener diode, indicated by the polarity band on the package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| Category | Diodes |
| Pins | 3 |
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 | 11.8 | 12 | 12.2 | V | @ IZT = 5 mA (Note 4), pulse test at TA = 25°C | 4 |
| Maximum Zener Impedance | ZZT | 25 | Ω | @ IZT = 5 mA (Note 4) | 4 | ||
| Reverse Leakage Current | IR | 0.1 | µA | @ VR = 8 V | 4 | ||
| Maximum Temperature Coefficient of VZ (minimum) | VZ | 6 | 10 | mV/k | @ IZT = 5 mA | 4 | |
| Max. Capacitance | C | 130 | pF | @ VR = 0 and f = 1 MHz | 4 | ||
| Forward Voltage | VF | 0.9 | V | @ IF = 10 mA | 4 | ||
| Total Power Dissipation on FR-5 Board | PD | 250 | mW | @ TA = 25°C (Note 1), FR-5 board | 2 | ||
| Total Power Dissipation on Alumina Substrate | PD | 300 | mW | @ TA = 25°C (Note 2), alumina substrate | 2 | ||
| Derating above 25°C, FR-5 Board | PD | 2 | mW/°C | Derated above 25°C, FR-5 board (Note 1) | 2 | ||
| Derating above 25°C, Alumina Substrate | PD | 2.4 | mW/°C | Derated above 25°C, alumina substrate (Note 2) | 2 | ||
| Thermal Resistance, Junction-to-Ambient, FR-5 Board | RθJA | 500 | °C/W | FR-5 board (Note 1) | 2 | ||
| Thermal Resistance, Junction-to-Ambient, Alumina Substrate | RθJA | 417 | °C/W | Alumina substrate (Note 2) | 2 | ||
| Junction and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 2 |
CAD (KiCad official)
- Symbol:
BZX84B12LT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.0 mm tall, datasheet A, nominal). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files:
bzx84b12lt1g-etched.step/bzx84b12lt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bzx84b12lt1g.step/bzx84b12lt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
062be86009a841c0, retrieved 2026-11-12, tier: manufacturer) - 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).