component
S9018H331
Public Made by Adomby adom
ALJ Bipolar (BJT), TO-92. 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
markdownS9018H331
ALJ · Bipolar (BJT) · TO-92
S9018H331 from ALJ, in a TO-92. 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 | Emitter | passive | Emitter of the NPN transistor; VEBO max 4 V and breakdown V(BR)EBO min 4 V at IE=100µA. |
| 2 | Base | passive | Base of the NPN transistor; saturation VBE(sat) max 1.42 V at IC=10mA, IB=1mA. |
| 3 | Collector | passive | Collector of the NPN transistor; VCBO 25 V, VCEO 18 V, IC max 50 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ALJ |
| Package | TO-92 |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector Base Voltage | VCBO | 25 | V | Ta=25°C | 1 | ||
| Collector Emitter Voltage | VCEO | 18 | V | Ta=25°C | 1 | ||
| Emitter Base Voltage | VEBO | 4 | V | Ta=25°C | 1 | ||
| Collector Current | IC | 50 | mA | Ta=25°C | 1 | ||
| Collector Power Dissipation | PC | 0.4 | W | Ta=25°C | 1 | ||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature | Tstg | -55 | 150 | °C | -55~+150 | 1 | |
| Thermal Resistance From Junction To Ambient | RθJA | 312.5 | °C/W | 1 | |||
| Collector-base breakdown voltage | V(BR)CBO | 25 | V | IC = 100µA, IE = 0 | 1 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | 18 | V | IC = 0.1mA, IB = 0 | 1 | ||
| Emitter-base breakdown voltage | V(BR)EBO | 4 | V | IE = 100µA, IC = 0 | 1 | ||
| Collector cut-off current | ICBO | 0.1 | μA | VCB = 20V, IE = 0 | 1 | ||
| Emitter cut-off current | IEBO | 0.1 | μA | VEB = 3V, IC = 0 | 1 | ||
| DC current gain | hFE | 100 | 300 | VCE = 5V, IC = 1mA | 1 | ||
| Collector-emitter saturation voltage | VCE(sat) | 0.5 | V | IC = 10mA, IB = 1mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | 1.42 | V | IC = 10mA, IB = 1mA | 1 | ||
| Transition frequency | fT | 800 | MHz | VCE=5V, IC=50mA, f=400MHz | 1 |
CAD (KiCad official)
- Symbol:
S9018H331 - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
s9018h331-etched.step/s9018h331-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);s9018h331.step/s9018h331.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ALJ datasheet (2 pp, sha256
8a3c533891bf4bd0, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).