component
CMZ5945B TR13 PBFREE
Public Made by Adomby adom
Central Semicon Zener Diodes, SMA. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdownCMZ5945B TR13 PBFREE
Central Semicon · Zener Diodes · SMA
CMZ5945B TR13 PBFREE from Central Semicon, in a SMA. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Central Semicon |
| Package | SMA |
| 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 (VZ @ IZT, min/nom/max) | VZ | 64.6 | 68 | 71.4 | V | IZT = 5.5 mA | 1 |
| Zener voltage tolerance (series) | -5 | 5 | % | Printed as ± 5% TOLERANCE for the CMZ5913B-CMZ5956B series; B suffix | 1 | ||
| Forward voltage | VF | 1.5 | V | IF = 200 mA (for all types) | 1 | ||
| Maximum zener impedance | ZZT | 120 | Ω | @ IZT = 5.5 mA | 2 | ||
| Maximum zener impedance (knee) | ZZK | 1700 | Ω | @ IZK = 0.25 mA | 2 | ||
| Maximum reverse current | IR | 1 | µA | @ VR = 51.7 V | 2 | ||
| Maximum zener current | IZM | 22 | mA | TL = 75°C | 2 | ||
| Peak forward surge current | IFSM | 10 | A | tp = 8.3 ms | 1 | ||
| Power dissipation | PD | 1.5 | W | TL = 75°C | 1 | ||
| Power dissipation (Note 1) | PD | 0.5 | W | Note 1: mounted on 2 inch square FR-4 PCB with minimum recommended SMA copper pad area | 1 | ||
| Peak power dissipation | PPK | 200 | W | tp = 10x1000µs (TL < 25°C) | 1 | ||
| Peak power dissipation | PPK | 1000 | W | tp = 8x20µs (TL < 25°C) | 1 | ||
| Operating and storage junction temperature | TJ, Tstg | -65 | 150 | °C | 1 | ||
| Thermal resistance, junction to lead | ΘJL | 50 | °C/W | 1 | |||
| Thermal resistance, junction to ambient (Note 1) | ΘJA | 250 | °C/W | Note 1: mounted on 2 inch square FR-4 PCB with minimum recommended SMA copper pad area | 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:
CMZ5945B TR13 PBFREE - Footprint:
Diode_SMD:D_SMA - 3D model: SMA (KiCad packages3D, STEP)
- 3D model files:
cmz5945b-tr13-pbfree-etched.step/cmz5945b-tr13-pbfree-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cmz5945b-tr13-pbfree.step/cmz5945b-tr13-pbfree.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Central Semicon datasheet (4 pp, sha256
16c84f8e66cdc5fa, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).