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DDTC144ECAQ-7-F

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

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DDTC144ECAQ-7-F

Diodes Incorporated · Digital Transistors · SOT-23

DDTC144ECAQ-7-F from Diodes Incorporated, 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 (base side, through R1) of the NPN pre-biased transistor, rated -10 to +40 V with respect to pin 2 for the DDTC144ECA.
2 GND power_in Ground (0 V) reference, the emitter side, against which the 50 V supply voltage at pin 3 and the input voltage at pin 1 are rated.
3 OUT output Output (collector) of the transistor, rated at VCC 50 V maximum to pin 2 and 30 mA maximum output current for the DDTC144ECA.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23
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
Supply Voltage VCC 50 V Pin 3 to 2, TA=+25°C 2
Input Voltage VIN -10 40 V Pin 1 to 2, DDTC144ECA 2
Output Current IO 30 mA DDTC144ECA 2
Output Current IC (Max) IC 100 mA 2
Power Dissipation PD 200 mW Mounted on FR4 PC board with minimum recommended pad layout 2
Operating and Storage Temperature Range TJ, TSTG -55 150 °C 2
Thermal Resistance, Junction to Ambient RθJA 625 °C/W Mounted on FR4 PC board with minimum recommended pad layout 2
Input Voltage (off) Vl(off) 0.5 1.1 V VCC = 5V, IO = 100μA 2
Input Voltage (on) Vl(on) 1.9 3 V VO = 0.3V, IO = 2mA 2
Output Voltage VO(on) 0.1 0.3 V IO/Il = 10mA/0.5mA 2
Input Current Il 0.18 mA VI = 5V 2
Output Current (off) IO(off) 0.5 μA VCC = 50V, VI = 0V 2
DC Current Gain Gl 80 VO = 5V, IO = 5mA, DDTC144ECAQ 2
Input Resistor Tolerance R1 -30 30 % 2
Resistance Ratio Tolerance R2/R1 0.8 1 1.2 % 2
Nominal Resistance R1, R2 R1, R2 47 kΩ R1 = R2 (NOM), DDTC144ECA 1
Gain-Bandwidth Product fT 250 MHz VCE = 10V, IE = 5mA, f = 100MHz (for reference only) 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208 1

CAD (KiCad official)

  • Symbol: DDTC144ECAQ-7-F
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ddtc144ecaq-7-f-etched.step / ddtc144ecaq-7-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ddtc144ecaq-7-f.step / ddtc144ecaq-7-f.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (5 pp, sha256 b71e1c1af45adb44, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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