component
AD-DTC144EM
Public Made by Adomby adom
Changjing Digital Transistors, SOT-723. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownAD-DTC144EM
Changjing · Digital Transistors · SOT-723
AD-DTC144EM 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 via built-in R1 (typ. 47 kΩ) to the transistor base; input voltage range is -10 to 40 V, with VI(off) min 0.5 V and VI(on) max 3 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, rated 30 mA output current (100 mA peak) and 50 V supply voltage. |
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 |
|---|---|---|---|---|---|---|---|
| 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 | ||
| Supply voltage | VCC | 50 | V | Tj = 25°C | 3 | ||
| Input voltage | VIN | -10 | 40 | V | Tj = 25°C | 3 | |
| Output current | IO | 30 | mA | Tj = 25°C, footnote 1 | 3 | ||
| Peak collector current | ICM | 100 | mA | Tj = 25°C | 3 | ||
| Maximum power dissipation (AD-DTC144EM, SOT-723 column) | PD | 100 | mW | Tj = 25°C, footnote 1 | 3 | ||
| Operating junction and storage temperature range | Tj, Tstg | -55 | 150 | °C | 3 |
CAD (KiCad official)
- Symbol:
AD-DTC144EM - 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-dtc144em-etched.step/ad-dtc144em-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad-dtc144em.step/ad-dtc144em.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (17 pp, sha256
08b0eb894ed045a2, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).