component
MMBTRC118SS
Public Made by Adomby adom
ST Semtech Digital Transistors, SOT-23. 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
markdownMMBTRC118SS
ST Semtech · Digital Transistors · SOT-23
MMBTRC118SS from ST Semtech, 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 | Base | input | Base (Input) terminal of the NPN with built-in bias resistors; for the MMBTRC118SS the absolute maximum input voltage is 12 V / -5 V. |
| 2 | Emitter | passive | Emitter (Common) terminal; the datasheet gives no separate electrical limit for this pin beyond the device absolute maximum ratings (junction temperature 150 °C, storage -55 to +150 °C). |
| 3 | Collector | output | Collector (Output) terminal; the absolute maximum output voltage is 50 V and output current is 100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOT-23 |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Cutoff Current | IO(OFF) | 500 | nA | at VO = 50 V | 2 | ||
| Input Current | II | 3.8 | mA | at VI = 5 V | 2 | ||
| Output Voltage | VO(ON) | 0.3 | V | at IO = 10 mA, II = 0.5 mA | 2 | ||
| Input Voltage (ON) | VI(ON) | 3 | V | at VO = 0.3 V, IO = 20 mA | 2 | ||
| Input Voltage (OFF) | VI(OFF) | 0.3 | V | at VCC = 5 V, IO = 100 µA | 2 | ||
| DC Current Gain | GI | 33 | at VO = 5 V, IO = 10 mA | 2 | |||
| Transition Frequency | fT | 250 | MHz | at VO = 10 V, IO = 5 mA; characteristic of transistor only | 2 | ||
| Output Voltage | VO | 50 | V | 1 | |||
| Input Voltage | VI | -5 | 12 | V | 1 | ||
| Output Current | IO | 100 | mA | 1 | |||
| Total Power Dissipation | Ptot | 200 | mW | 1 | |||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature Range | TStg | -55 | 150 | °C | 1 | ||
| Thermal Resistance from Junction to Ambient | RθJA | 625 | /W | Device mounted on FR-4 PC board, 2oz copper, minimum recommended pad layout | 1 | ||
| Built-in input bias resistor R1 | R1 | 2.2 | kΩ | 1 | |||
| Built-in bias resistor R2 | R2 | 10 | kΩ | 1 |
CAD (KiCad official)
- Symbol:
MMBTRC118SS - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbtrc118ss-etched.step/mmbtrc118ss-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbtrc118ss.step/mmbtrc118ss.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (7 pp, sha256
f28e2347f7518bbb, 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).