component

LMBTA42LT1G

Public Made by Adom

by adom

LRC Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs Publish 0.1.0 · Ray 29d ago
viewers lmbta42lt1g: viewers · Ray 29d ago
lmbta42lt1g-etched.glb lmbta42lt1g: factory component page (tier=lcsc) · Ray 29d ago
lmbta42lt1g-etched.step lmbta42lt1g: factory component page (tier=lcsc) · Ray 29d ago
lmbta42lt1g-hero.glb lmbta42lt1g: hero GLB from the etched model (keeps the MPN mark) · Ray 29d ago
lmbta42lt1g-hero.overlay.json Publish 0.1.0 · Ray 29d ago
lmbta42lt1g.glb Publish 0.1.0 · Ray 29d ago
lmbta42lt1g.kicad_mod Publish 0.1.0 · Ray 29d ago
lmbta42lt1g.kicad_sym Publish 0.1.0 · Ray 29d ago
lmbta42lt1g.lbr Publish 0.1.0 · Ray 29d ago
lmbta42lt1g.step Publish 0.1.0 · Ray 29d ago
package.json Publish 0.1.0 · Ray 29d ago
page.json lmbta42lt1g: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 24d ago
README.md lmbta42lt1g: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 24d ago

LMBTA42LT1G

LRC · Bipolar (BJT) · SOT-23

LMBTA42LT1G 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 terminal of the LMBTA42LT1G NPN transistor; the datasheet gives V_BE(sat) of 0.9 Vdc max at I_C = 20 mAdc, I_B = 2.0 mAdc.
2 EMITTER passive Emitter terminal; the datasheet gives emitter-base voltage V_EBO of 6.0 Vdc max and emitter-base breakdown V_(BR)EBO of 6.0 Vdc min.
3 COLLECTOR passive Collector terminal; the datasheet gives collector-emitter voltage V_CEO of 300 Vdc for LMBTA42 and collector current I_C of 500 mAdc continuous.

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
Collector–Emitter Voltage VCEO 300 Vdc 1
Collector–Base Voltage VCBO 300 Vdc 1
Emitter–Base Voltage VEBO 6 Vdc 1
Collector Current — Continuous IC 500 mAdc 1
Junction and Storage Temperature TJ, Tstg -55 150 °C 1
Total Device Dissipation (FR-5 Board) PD 225 mW TA = 25°C, FR-5 board 1
Thermal Resistance, Junction to Ambient (FR-5 Board) RθJA 556 °C/W FR-5 board 1
Total Device Dissipation (Alumina Substrate) PD 300 mW TA = 25°C, alumina substrate 1
Thermal Resistance, Junction to Ambient (Alumina Substrate) RθJA 417 °C/W alumina substrate 1
Collector–Emitter Breakdown Voltage V(BR)CEO 300 Vdc IC = 1.0 mAdc, IB = 0 (LMBTA42) 1
Collector–Base Breakdown Voltage V(BR)CBO 300 Vdc IC = 100 µAdc, IE = 0 (LMBTA42) 1
Emitter–Base Breakdown Voltage V(BR)EBO 6 Vdc IE = 100 µAdc, IC = 0 1
Collector Cutoff Current ICBO 0.1 µAdc VCB = 200 Vdc, IE = 0 (LMBTA42) 1
Emitter Cutoff Current IEBO 0.1 µAdc VEB = 6.0 Vdc, IC = 0 (LMBTA42) 1
DC Current Gain hFE 25 IC = 1.0 mAdc, VCE = 10 Vdc (Both Types) 2
DC Current Gain hFE 40 IC = 10 mAdc, VCE = 10 Vdc (Both Types) 2
Collector–Emitter Saturation Voltage VCE(sat) 0.5 Vdc IC = 20 mAdc, IB = 2.0 mAdc (LMBTA42) 2
Base–Emitter Saturation Voltage VBE(sat) 0.9 Vdc IC = 20 mAdc, IB = 2.0 mAdc 2
Current–Gain–Bandwidth Product fT 50 MHz VCE = 20 Vdc, IC = 10 mA, f = 100 MHz 2
Collector–Base Capacitance Ccb 3 pF VCB = 20 Vdc, IE = 0, f = 1.0 MHz (LMBTA42) 2

CAD (KiCad official)

  • Symbol: LMBTA42LT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: lmbta42lt1g-etched.step / lmbta42lt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lmbta42lt1g.step / lmbta42lt1g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: LRC datasheet (4 pp, sha256 4f28cae5709468a3, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF