component
MMBT5550LT1G
Public Made by Adomby adom
onsemi Bipolar (BJT), 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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README
markdownMMBT5550LT1G
onsemi · Bipolar (BJT) · SOT-23
MMBT5550LT1G from onsemi, 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 | BASE | input | Base terminal of the NPN transistor; the datasheet gives an emitter-base voltage rating VEBO of 6.0 Vdc and an emitter cutoff current IEBO of 50 nAdc max at VEB = 4.0 Vdc. |
| 2 | EMITTER | passive | Emitter terminal of the NPN transistor; the emitter-base voltage is rated at 6.0 Vdc maximum (VEBO). |
| 3 | COLLECTOR | passive | Collector terminal of the NPN transistor; rated for VCEO of 140 Vdc (MMBT5550) or 160 Vdc (MMBT5551) and continuous collector current IC of 600 mAdc. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBT5550LT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt5550lt1g-etched.step/mmbt5550lt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt5550lt1g.step/mmbt5550lt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
7f75cfa596884c35, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).