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AD-DTA124EM

Public Made by Adom

by adom

Changjing Digital Transistors, SOT-723. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AD-DTA124EM

Changjing · Digital Transistors · SOT-723

AD-DTA124EM from Changjing, in a SOT-723. 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 R1 (15.4 to 28.6 kΩ, 22 kΩ typ) to the base; input voltage range is -40 V to 10 V, with VI(off) of -0.5 V min and VI(on) of -3 V max.
2 GND power_in Ground/emitter reference, labelled GND(+) in the equivalent circuit, where the R2 base-emitter resistor also returns.
3 OUT output Open-collector output of the PNP transistor, rated for -30 mA output current (-100 mA peak) and VO(on) of -0.3 V max at IO/II = -10 mA/-0.5 mA.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-723
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 2
Input voltage VIN -40 10 V 2
Output current IO -30 mA Note 1: maximum allowed temperature Tj = 25°C 2
Peak collector current ICM -100 mA Note 1: maximum allowed temperature Tj = 25°C 2
Maximum power dissipation PD 100 mW Note 1: maximum allowed temperature Tj = 25°C; value for M variant (SOT-723) 2
Operating junction and storage temperature range Tj, Tstg -55 150 °C 2
Input voltage (off) VI(off) -0.5 V VCC = -5V, IO = -100µA 2
Input voltage (on) VI(on) -3 V VO = -0.3V, IO = -5mA 2
Output voltage (on) VO(on) -0.3 V IO/II = -10mA/-0.5mA 2
Input current II -0.36 mA VI = -5V 2
Output current (off) IO(off) -0.5 µA VCC = -50V, VI = 0V 2
DC current gain GI 56 - VO = -5V, IO = -5mA 2
Input resistance R1 15.4 22 28.6 kΩ 2
Resistance ratio R2/R1 0.8 1 1.2 2
Transition frequency fT 250 MHz VO = -10V, IO = -5mA, f = 100MHz 2

CAD (KiCad official)

  • Symbol: AD-DTA124EM
  • Footprint: Package_TO_SOT_SMD:SOT-723
  • 3D model: SOT-723, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.5 mm nominal SOT-723 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: ad-dta124em-etched.step / ad-dta124em-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ad-dta124em.step / ad-dta124em.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (16 pp, sha256 3867e1262e761a3c, retrieved 2026-10-17, 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