component
BUT11AFTU
Public Made by Adomby adom
onsemi Bipolar Transistors - BJT, TO-220-3. 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
markdownBUT11AFTU
onsemi · Bipolar Transistors - BJT · TO-220-3
BUT11AFTU from onsemi, in a TO-220-3. 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 of the NPN transistor; maximum DC base current 2 A (4 A pulsed) and maximum emitter-base voltage 9 V. |
| 2 | Collector | passive | Collector of the NPN transistor; BUT11AF is rated VCBO 1000 V, VCEO 450 V and 5 A DC (10 A pulsed) collector current. |
| 3 | Emitter | passive | Emitter of the NPN transistor, the common return for base and collector currents; collector dissipation is limited to 40 W at TC=25°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-220-3 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |
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 |
|---|---|---|---|---|
| housing | PC | IBP *Base Current (Pulse) 4 A PC Collector Dissipation (TC=25°C) 40 W | 1 |
CAD (KiCad official)
- Symbol:
BUT11AFTU - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220-3 (KiCad packages3D, STEP)
- 3D model files:
but11aftu-etched.step/but11aftu-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);but11aftu.step/but11aftu.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (4 pp, sha256
8e8f7bca98c624d8, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).