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CMPZ5242B TR PBFREE
Public Made by Adomby adom
Central Semicon 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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Contents
README
markdownCMPZ5242B TR PBFREE
Central Semicon · Zener Diodes · SOT-23
CMPZ5242B TR PBFREE from Central Semicon, 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 of the zener diode; the datasheet lists lead code 1 as Anode (VF=0.9V max at IF=10mA). |
| 2 | NC | unconnected | No connection, per the datasheet lead code for the SOT-23 case. |
| 3 | Cathode | passive | Cathode of the zener diode; the CMPZ5242B has a nominal VZ of 12V (11.40V to 12.60V) at IZT=20mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Central Semicon |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage | VZ | 11.4 | 12 | 12.6 | V | @ IZT=20mA, TA=25°C | 1 |
| Zener Test Current | IZT | 20 | mA | TA=25°C | 1 | ||
| Maximum Zener Impedance | ZZT | 30 | Ω | @ IZT=20mA | 1 | ||
| Maximum Zener Impedance (knee) | ZZK | 600 | Ω | @ IZK=0.25mA | 1 | ||
| Maximum Reverse Current | IR | 1 | μA | @ VR=9.1V | 1 | ||
| Forward Voltage | VF | 0.9 | V | @ IF=10mA | 1 | ||
| Power Dissipation | PD | 350 | mW | TA=25°C | 1 | ||
| Operating and Storage Junction Temperature | TJ, Tstg | -65 | 150 | °C | 1 | ||
| VZ Tolerance | -5 | 5 | % | "B" suffix | 1 | ||
| Temperature Coefficient of VZ | ΘVZ | 0.077 | %/°C | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | 1. If requesting Tin/Lead plated devices, add the suffix “ TIN/LEAD” to the part number when ordering (example: 2N2222A TIN/LEAD). | 3 |
CAD (KiCad official)
- Symbol:
CMPZ5242B TR PBFREE - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
cmpz5242b-tr-pbfree-etched.step/cmpz5242b-tr-pbfree-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cmpz5242b-tr-pbfree.step/cmpz5242b-tr-pbfree.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Central Semicon datasheet (3 pp, sha256
8539b162a192d6fe, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).