component
CZT127
Public Unreviewedby Ray
Changjing Darlington Transistors, SOT-223. Datasheet-verified pinout, 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
markdownCZT127
Changjing · Darlington Transistors · SOT-223
CZT127 from Changjing, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | B | input | Base of the PNP Darlington transistor. VEBO max = -5 V. Drive current sets collector current via combined Darlington gain (hFE ≥ 1000 typical at IC = -3 A, VCE = -3 V). |
| 2 | C | passive | Collector of the PNP Darlington transistor. VCBO max = -100 V, VCEO max = -100 V, IC(continuous) = -5 A, PC = 1 W. Tab (large center pad) of the SOT-223 is internally connected to the collector. |
| 3 | E | passive | Emitter of the PNP Darlington transistor. VBE(on) ≈ -2.5 V at IC = -3 A (two Vbe drops due to Darlington). VCE(sat) ≤ -2 V at IC = -3 A, IB = -12 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-223 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
CZT127 - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (3 pp, sha256
f209bc4fcfb6864a, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).