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DTC123ECA

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Changjing Digital Transistors, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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DTC123ECA

Changjing · Digital Transistors · SOT-23

DTC123ECA from Changjing, 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 IN input Input pin to the built-in bias-resistor network, with the datasheet's maximum ratings giving an input voltage range of -10 V to +12 V for the DTC123E family.
2 GND power_in Ground reference pin; the datasheet gives no separate electrical limit for this pin.
3 OUT output Open-collector NPN output, rated for up to 100 mA output current with VO(on) of 0.3 V max at IO/II = 10 mA/0.5 mA.

Key specifications

Parameter Value
Manufacturer Changjing
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
Supply Voltage VCC 50 V 2
Input Voltage VIN -10 12 V 2
Output Current IO 100 mA 2
Power Dissipation (DTC123ECA, SOT-23 column) PD 200 mW 2
Operation Junction and Storage Temperature Range TJ,Tstg -55 150 ℃ 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=20mA 2
Output voltage (on) VO(on) 0.3 V IO/II=10mA/0.5mA 2
Input current II 3.8 mA VI=5V 2
Output current (off) IO(off) 0.5 μA VCC=50V,VI=0 2
DC current gain GI 20 VO=5V,IO=20mA 2
Input resistance R1 1.54 2.2 2.86 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: DTC123ECA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: dtc123eca-etched.step / dtc123eca-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dtc123eca.step / dtc123eca.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (14 pp, sha256 3e2ebf3df62773fa, retrieved 2026-10-18, 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