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AD-DTC144EUA

Public Made by Adom

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Changjing Digital Transistors, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AD-DTC144EUA

Changjing · Digital Transistors · SOT-323

AD-DTC144EUA from Changjing, in a SOT-323. 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 IN input Input through built-in 47 kΩ (typ) base resistor R1; VI(off) min 0.5 V, VI(on) max 3 V, input voltage rating -10 to 40 V.
2 GND power_in Ground, connected to the transistor emitter and the R2 bias resistor.
3 OUT output Open-collector output of the NPN transistor; output current up to 30 mA, supply voltage rating 50 V, VO(on) max 0.3 V at 10 mA/0.5 mA.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-323
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
Supply voltage VCC 50 V 3
Input voltage VIN -10 40 V 3
Output current IO 30 mA Tj = 25°C (footnote 1) 3
Peak collector current ICM 100 mA 3
Maximum power dissipation (AD-DTC144EUA, SOT-323 column) PD 200 mW Tj = 25°C (footnote 1) 3
Operating junction and storage temperature range Tj, Tstg -55 150 °C 3
Input voltage (off) VI(off) 0.5 V VCC = 5V, IO = 100µA 3
Input voltage (on) VI(on) 3 V VO = 0.3V, IO = 2mA 3
Output voltage (on) VO(on) 0.3 V IO/II = 10mA/0.5mA 3
Input current II 0.18 mA VI = 5V 3
Output current (off) IO(off) 0.5 µA VCC = 50V, VI = 0V 3
DC current gain GI 68 VO = 5V, IO = 5mA 3
Input resistance R1 32.9 47 61.1 kΩ 3
Resistance ratio R2/R1 0.8 1 1.2 3
Transition frequency fT 250 MHz VO = 10V, IO = 5mA, f = 100MHz 3

CAD (KiCad official)

  • Symbol: AD-DTC144EUA
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: ad-dtc144eua-etched.step / ad-dtc144eua-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad-dtc144eua.step / ad-dtc144eua.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (17 pp, sha256 08b0eb894ed045a2, retrieved 2026-10-19, tier: lcsc)
  • 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