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DTC143XKAT146

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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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DTC143XKAT146

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

DTC143XKAT146 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 pin, connected to the emitter of the built-in NPN transistor and to R2.
2 IN (BASE) input Input pin, connected to the base through built-in R1 (4.7kΩ typ.), with VI(off) max 0.3V, VI(on) min 2.5V and input voltage range -7 to 20V.
3 OUT (COLLECTOR) output Output pin, connected to the collector of the NPN transistor, rated for 50V supply (VCC) and 100mA output current.

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) 0.3 V VCC = 5V, IO = 100μA 2
Input voltage (on) VI(on) 2.5 V VO = 0.3V, IO = 20mA 2
Output voltage VO(on) 100 300 mV IO / II = 10mA / 0.5mA 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 30 VO = 5V, IO = 10mA 2
Input resistance R1 3.29 4.7 6.11 kΩ 2
Resistance ratio R2/R1 1.7 2.1 2.6 2
Transition frequency fT 250 MHz VCE = 10V, IE = -5mA, f = 100MHz (characteristics of built-in transistor) 2
Supply voltage VCC 50 V Ta = 25°C 2
Input voltage VIN -7 20 V Ta = 25°C 2
Output current IO 100 mA Ta = 25°C 2
Collector current IC(MAX) 100 mA Ta = 25°C, characteristics of built-in transistor 2
Power dissipation DTC143XKA PD 200 mW Ta = 25°C, each terminal mounted on a reference land 2
Junction temperature Tj 150 ℃ Ta = 25°C 2
Storage temperature Tstg -55 150 ℃ Ta = 25°C 2

CAD (KiCad official)

  • Symbol: DTC143XKAT146
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: TO-236-3(SOT-23-3) (KiCad packages3D, STEP)
  • 3D model files: dtc143xkat146-etched.step / dtc143xkat146-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); dtc143xkat146.step / dtc143xkat146.glb are the bare package body.

Provenance

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

  • Datasheet: ROHM Semicon datasheet (12 pp, sha256 b4ef0541783df43a, 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