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DTB143EKT146

Public Made by Adom

by adom

ROHM Semicon Digital Transistors, TO-236-3(SOT-23-3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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DTB143EKT146

ROHM Semicon · Digital Transistors · TO-236-3(SOT-23-3)

DTB143EKT146 from ROHM Semicon, in a TO-236-3(SOT-23-3). 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 GND (EMITTER) power_in Ground/emitter terminal of the built-in PNP transistor, connected to R2 and the emitter; VCC rating is -50V and IC(MAX) is -500mA.
2 IN (BASE) input Input/base terminal through R1 (4.7kΩ typ.); input voltage range -30 to 10V, VI(off) max -0.5V and VI(on) min -3.0V.
3 OUT (COLLECTOR) output Output/collector terminal of the built-in transistor; supply voltage -50V max, collector current -500mA max, IO(off) max -500nA at VCC=-50V.

Key specifications

Parameter Value
Manufacturer ROHM Semicon
Package TO-236-3(SOT-23-3)
Category Transistors
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) -0.5 V VCC = -5V, IO = -100μA 2
Input voltage (on) VI(on) -3 V VO = -0.3V, IO = -20mA 2
Output voltage VO(on) -100 -300 mV IO / II = -50mA / -2.5mA 2
Input current II -1.8 mA VI = -5V 2
Output current IO(off) -500 nA VCC = -50V, VI = 0V 2
DC current gain GI 47 VO = -5V, IO = -50mA 2
Input resistance R1 3.29 4.7 6.11 kΩ 2
Resistance ratio R2/R1 0.8 1 1.2 2
Transition frequency fT 200 MHz VCE = -10V, IE = 50mA, f = 100MHz; characteristics of built-in transistor 2
Supply voltage VCC -50 V Ta = 25°C 2
Input voltage VIN -30 10 V Ta = 25°C 2
Collector current IC(MAX) -500 mA Ta = 25°C 2
Power dissipation PD 200 mW Ta = 25°C; each terminal mounted on a reference land 2
Junction temperature Tj 150 ℃ Ta = 25°C 2
Storage temperature range Tstg -55 150 ℃ Ta = 25°C 2

CAD (KiCad official)

  • Symbol: DTB143EKT146
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: TO-236-3(SOT-23-3) (KiCad packages3D, STEP)
  • 3D model files: dtb143ekt146-etched.step / dtb143ekt146-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dtb143ekt146.step / dtb143ekt146.glb are the bare package body.

Provenance

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

  • Datasheet: ROHM Semicon datasheet (6 pp, sha256 4b97dc18d17c2f3c, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF