component
BDX33C
Public Made by Adomby adom
STMicroelectronics Darlington Transistors, TO-220. 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
markdownBDX33C
STMicroelectronics · Darlington Transistors · TO-220
BDX33C from STMicroelectronics, in a TO-220. 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 | Base | input | Base terminal; DC current gain 750 at IC = 3 A and VCE = 3 V; maximum base current 0.25 A. |
| 2 | Collector | output | Collector terminal; maximum collector current 10 A continuous, 15 A peak; collector-emitter sustaining voltage 100 V; collector-emitter saturation voltage 2.5 V at IC = 3 A and IB = 6 mA. |
| 3 | Emitter | passive | Emitter terminal; emitter cut-off current 5 mA at VEB = 5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-220 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
BDX33C - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files:
bdx33c-etched.step/bdx33c-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bdx33c.step/bdx33c.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (4 pp, sha256
3702a741925a6273, retrieved 2026-10-01, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).