# MMUN2214LT1G

**onsemi** · Digital Transistors · SOT-23

MMUN2214LT1G from onsemi, 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 built-in bias network, with forward input voltage VIN(fwd) up to 40 Vdc and reverse input voltage VIN(rev) up to 6 Vdc. |
| 2 | EMITTER | power_in | Emitter terminal, labeled GROUND on the datasheet; the emitter-base cutoff current is specified at VEB = 6.0 V. |
| 3 | COLLECTOR | output | Collector (output) terminal, with collector-emitter voltage VCEO 50 Vdc and continuous collector current IC 100 mAdc maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector-Base Cutoff Current | ICBO |  |  | 100 | nAdc | VCB = 50 V, IE = 0 | 4 |
| Collector-Emitter Cutoff Current | ICEO |  |  | 500 | nAdc | VCE = 50 V, IB = 0 | 4 |
| Emitter-Base Cutoff Current | IEBO |  |  | 0.2 | mAdc | VEB = 6.0 V, IC = 0 | 4 |
| Collector-Base Breakdown Voltage | V(BR)CBO | 50 |  |  | Vdc | IC = 10 A, IE = 0 | 4 |
| Collector-Emitter Breakdown Voltage | V(BR)CEO | 50 |  |  | Vdc | IC = 2.0 mA, IB = 0 | 4 |
| DC Current Gain | hFE | 80 | 140 |  |  | IC = 5.0 mA, VCE = 10 V | 4 |
| Collector Emitter Saturation Voltage | VCE(sat) |  |  | 0.25 | Vdc | IC = 10 mA, IB = 0.3 mA | 4 |
| Input Voltage (off) | Vi(off) |  | 0.7 | 0.5 | Vdc | VCE = 5.0 V, IC = 100 A | 4 |
| Input Voltage (on) | Vi(on) | 1.4 | 0.8 |  | Vdc | VCE = 0.3 V, IC = 1.0 mA | 4 |
| Output Voltage (on) | VOL |  |  | 0.2 | Vdc | VCC = 5.0 V, VB = 2.5 V, RL = 1.0 k | 4 |
| Output Voltage (off) | VOH | 4.9 |  |  | Vdc | VCC = 5.0 V, VB = 0.5 V, RL = 1.0 k | 4 |
| Input Resistor R1 | R1 | 7 | 10 | 13 | k |  | 4 |
| Resistor Ratio | R1/R2 | 0.17 | 0.21 | 0.25 |  |  | 4 |
| Collector-Base Voltage | VCBO |  |  | 50 | Vdc | Maximum Ratings (TA = 25°C) | 1 |
| Collector-Emitter Voltage | VCEO |  |  | 50 | Vdc | Maximum Ratings (TA = 25°C) | 1 |
| Collector Current - Continuous | IC |  |  | 100 | mAdc | Maximum Ratings (TA = 25°C) | 1 |
| Input Forward Voltage | VIN(fwd) |  |  | 40 | Vdc | Maximum Ratings (TA = 25°C) | 1 |
| Input Reverse Voltage | VIN(rev) |  |  | 6 | Vdc | Maximum Ratings (TA = 25°C) | 1 |
| Total Device Dissipation (SOT-23, Note 1) | PD |  |  | 246 | mW | TA = 25°C, Note 1: FR-4 @ Minimum Pad | 3 |
| Total Device Dissipation (SOT-23, Note 2) | PD |  |  | 400 | mW | TA = 25°C, Note 2: FR-4 @ 1.0 x 1.0 Inch Pad | 3 |
| Derate above 25°C (SOT-23, Note 1) |  |  |  | 2 | mW/°C | Note 1: FR-4 @ Minimum Pad | 3 |
| Derate above 25°C (SOT-23, Note 2) |  |  |  | 3.2 | mW/°C | Note 2: FR-4 @ 1.0 x 1.0 Inch Pad | 3 |
| Thermal Resistance, Junction to Ambient (SOT-23, Note 1) | RJA |  |  | 508 | °C/W | Note 1: FR-4 @ Minimum Pad | 3 |
| Thermal Resistance, Junction to Ambient (SOT-23, Note 2) | RJA |  |  | 311 | °C/W | Note 2: FR-4 @ 1.0 x 1.0 Inch Pad | 3 |
| Thermal Resistance, Junction to Lead (SOT-23, Note 1) | RJL |  |  | 174 | °C/W | Note 1: FR-4 @ Minimum Pad | 3 |
| Thermal Resistance, Junction to Lead (SOT-23, Note 2) | RJL |  |  | 208 | °C/W | Note 2: FR-4 @ 1.0 x 1.0 Inch Pad | 3 |
| Junction and Storage Temperature Range | TJ, Tstg | -55 |  | 150 | °C |  | 3 |

## CAD (KiCad official)

- Symbol: `MMUN2214LT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmun2214lt1g-etched.step` / `mmun2214lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmun2214lt1g.step` / `mmun2214lt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586176612539121664) (12 pp, sha256 `38ff1ba326f7e57d`, retrieved 2026-10-09, 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/mmun2214lt1g-datasheet.pdf)