component
LDTB123YLT1G
Public Made by Adomby adom
LRC Digital Transistors, 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
markdownLDTB123YLT1G
LRC · Digital Transistors · SOT-23
LDTB123YLT1G from LRC, 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 is the input of the built-in bias resistor network (R1 = 2.2 kΩ, R2 = 10 kΩ), with input voltage limited to −12 V to +5 V. |
| 2 | EMITTER | passive | Emitter of the PNP transistor, referenced to the supply rated at VCC −50 V maximum; the datasheet gives no further function for this pin. |
| 3 | COLLECTOR | output | Collector is the output of the stage, rated for output current IC −500 mA and package power dissipation PD 200 mW. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage (off) | VI(off) | -0.3 | V | VCC=−5V, IO=−100µA | 1 | ||
| Input voltage (on) | VI(on) | -2 | V | VO=−0.3V, IO= −20mA | 1 | ||
| Output voltage (on) | VO(on) | -0.1 | -0.3 | V | IO/II=−50mA/−2.5mA | 1 | |
| Input current | II | -3 | mA | VI=−5V | 1 | ||
| Output current (off) | IO(off) | -0.5 | µA | VCC=−50V, VI=0V | 1 | ||
| Input resistance R1 | R1 | 1.54 | 2.2 | 2.86 | kΩ | 1 | |
| DC current gain | GI | 56 | VO=−5V, IO=−50mA | 1 | |||
| Resistance ratio | R2/R1 | 3.6 | 4.5 | 5.5 | 1 | ||
| Supply voltage | VCC | -50 | V | 1 | |||
| Input voltage | VIN | -12 | 5 | V | 1 | ||
| Output current | IC | -500 | mA | 1 | |||
| Power dissipation | PD | 200 | mW | 1 | |||
| Junction temperature | Tj | 150 | °C | 1 | |||
| Storage temperature | Tstg | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
LDTB123YLT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
ldtb123ylt1g-etched.step/ldtb123ylt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ldtb123ylt1g.step/ldtb123ylt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LRC datasheet (3 pp, sha256
195b0f09f104e295, retrieved 2026-10-18, 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).