component
DDTC144WE-7-F
Public Made by Adomby adom
Diodes Incorporated Digital Transistors, SOT-523. 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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Contents
README
markdownDDTC144WE-7-F
Diodes Incorporated · Digital Transistors · SOT-523
DDTC144WE-7-F from Diodes Incorporated, in a SOT-523. 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) terminal of the pre-biased NPN transistor; for the DDTC144WE the input voltage (1 to 2) is rated from -10 V to +40 V. |
| 2 | GND | power_in | Ground (GND, 0 V) reference terminal, common to the input and the output; the supply VCC is specified from pin 3 to pin 2. |
| 3 | OUT | output | Output (collector) terminal of the transistor; output current is rated at 30 mA maximum for the DDTC144WE, and the supply voltage VCC (3 to 2) is 50 V maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-523 |
| 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 Resistor Tolerance | ΔR1 | -30 | 30 | % | 2 | ||
| Resistance Ratio Tolerance | ΔR2/R1 | -20 | 20 | % | 2 | ||
| Input Voltage (off) | Vl(off) | 0.8 | V | VCC = 5V, IO = 100μA | 2 | ||
| Input Voltage (on) | Vl(on) | 4 | 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 | 0.16 | mA | VI = 5V | 2 | ||
| Output Current | IO(off) | 0.5 | μA | VCC = 50V, VI = 0V | 2 | ||
| DC Current Gain | Gl | 56 | VO = 5V, IO = 5mA | 2 | |||
| Input Voltage (range, maximum ratings) | VIN | -10 | 40 | V | 1 | ||
| Supply Voltage | VCC | 50 | V | 1 | |||
| Output Current | IO | 30 | mA | 1 | |||
| Output Current All IC (Max) | 100 | mA | 1 | ||||
| Power Dissipation | Pd | 150 | mW | 2 | |||
| Operating and Storage Temperature Range | Tj, TSTG | -55 | 150 | °C | 2 | ||
| Thermal Resistance, Junction to Ambient Air | RθJA | 833 | °C/W | Note 1 (FR4 PCB with recommended pad layout) | 2 | ||
| Input Resistor R1 (NOM) | R1 | 47 | KΩ | 1 | |||
| Input Resistor R2 (NOM) | R2 | 22 | KΩ | 1 |
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: Solderable per MIL-STD-202, Method 208 • Lead Free Plating (Matte Tin Finish annealed over Alloy 42 | 1 |
CAD (KiCad official)
- Symbol:
DDTC144WE-7-F - Footprint:
Package_TO_SOT_SMD:SOT-523 - 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 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:
ddtc144we-7-f-etched.step/ddtc144we-7-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ddtc144we-7-f.step/ddtc144we-7-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (4 pp, sha256
d2661de44cd9b2e1, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).