MMBTRC105SS

YFW · Digital Transistors · SOT-23

MMBTRC105SS from YFW, 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	Input pin of the built-in bias network (R1 = 2.2 kΩ for MMBTRC105SS), with input voltage limits of 12 V and -5 V as absolute maximum ratings.
2	Emitter	passive	Common emitter of the transistor, which the datasheet labels as the common terminal of the built-in R1/R2 network (R2 = 47 kΩ for MMBTRC105SS).
3	Collector	output	Output pin with a maximum output voltage of 50 V and maximum output current of 100 mA (absolute maximum ratings, Ta = 25 °C).

Key specifications

Parameter	Value
Manufacturer	YFW
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	Max	Unit	Conditions	Page
DC Current Gain	GI	80			at VO = 5 V, IO = 10 mA (MMBTRC105SS)	2
Output Cutoff Current	IO(OFF)		500	nA	at VO = 50 V	2
Input Current	II		3.6	mA	at VI = 5 V (MMBTRC105SS)	2
Output Voltage	VO(ON)		0.3	V	at IO = 10 mA, II = 0.5 mA	2
Input Voltage (ON)	VI(ON)		1.1	V	at VO = 0.2 V, IO = 5 mA (MMBTRC105SS)	2
Input Voltage (OFF)	VI(OFF)	0.5		V	at VO = 5 V, IO = 0.1 mA (MMBTRC105SS~106SS)	2
Output Voltage (absolute maximum)	VO		50	V		1
Input Voltage (absolute maximum, MMBTRC105SS)	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

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
housing	Abs		SOT-23 Plastic Package Absolute Maximum Ratings (Ta = 25	1

CAD (KiCad official)

Symbol: MMBTRC105SS
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)
3D model files: mmbtrc105ss-etched.step / mmbtrc105ss-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mmbtrc105ss.step / mmbtrc105ss.glb are the bare package body.

Provenance

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

Datasheet: YFW datasheet (6 pp, sha256 02a97b93bf0fe12b, retrieved 2026-10-18, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF

# MMBTRC105SS

**YFW** · Digital Transistors · SOT-23

MMBTRC105SS from YFW, 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 | Input pin of the built-in bias network (R1 = 2.2 kΩ for MMBTRC105SS), with input voltage limits of 12 V and -5 V as absolute maximum ratings. |
| 2 | Emitter | passive | Common emitter of the transistor, which the datasheet labels as the common terminal of the built-in R1/R2 network (R2 = 47 kΩ for MMBTRC105SS). |
| 3 | Collector | output | Output pin with a maximum output voltage of 50 V and maximum output current of 100 mA (absolute maximum ratings, Ta = 25 °C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| 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 |
|---|---|---|---|---|---|---|---|
| DC Current Gain | GI | 80 |  |  |  | at VO = 5 V, IO = 10 mA (MMBTRC105SS) | 2 |
| Output Cutoff Current | IO(OFF) |  |  | 500 | nA | at VO = 50 V | 2 |
| Input Current | II |  |  | 3.6 | mA | at VI = 5 V (MMBTRC105SS) | 2 |
| Output Voltage | VO(ON) |  |  | 0.3 | V | at IO = 10 mA, II = 0.5 mA | 2 |
| Input Voltage (ON) | VI(ON) |  |  | 1.1 | V | at VO = 0.2 V, IO = 5 mA (MMBTRC105SS) | 2 |
| Input Voltage (OFF) | VI(OFF) | 0.5 |  |  | V | at VO = 5 V, IO = 0.1 mA (MMBTRC105SS~106SS) | 2 |
| Output Voltage (absolute maximum) | VO |  |  | 50 | V |  | 1 |
| Input Voltage (absolute maximum, MMBTRC105SS) | 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 |

## 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 |
|---|---|---|---|---|
| housing | Abs |  | SOT-23 Plastic Package Absolute Maximum Ratings (Ta = 25 | 1 |

## CAD (KiCad official)

- Symbol: `MMBTRC105SS`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbtrc105ss-etched.step` / `mmbtrc105ss-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbtrc105ss.step` / `mmbtrc105ss.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387719313866752) (6 pp, sha256 `02a97b93bf0fe12b`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/mmbtrc105ss-datasheet.pdf)