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SMMUN2114LT1G
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onsemi Digital Transistors, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.md+73docs/hero.pngdocs/smmun2114lt1g-datasheet.pdf+7612package.json+162page.json+168smmun2114lt1g-etched.glbsmmun2114lt1g-hero.glbsmmun2114lt1g-hero.overlay.json+150smmun2114lt1g.glbsmmun2114lt1g.kicad_mod+177smmun2114lt1g.kicad_sym+25smmun2114lt1g.lbr+116smmun2114lt1g.step+1434viewers/footprint.html+1viewers/symbol.html+1README.mdadded+73@@ -0,0 +1,73 @@+# SMMUN2114LT1G++**onsemi** · Digital Transistors · SOT-23++SMMUN2114LT1G 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 | Input of the bias resistor transistor, with a series input resistor R1 = 10 kΩ; the datasheet limits the input forward voltage to 40 Vdc and the input reverse voltage to 6 Vdc. |+| 2 | EMITTER | power_in | Emitter, labeled GROUND in the datasheet, with the base-emitter resistor R2 = 47 kΩ connected between base and emitter. |+| 3 | COLLECTOR | output | Output of the transistor, rated for a collector-emitter voltage VCEO of 50 Vdc maximum and a continuous collector current IC of 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 (Note 5) | 4 |+| DC Current Gain | hFE | 80 | 140 | | | IC = 5.0 mA, VCE = 10 V (Note 5) | 4 |+| Collector Emitter Saturation Voltage | VCE(sat) | | | 0.25 | Vdc | IC = 10 mA, IB = 0.3 mA (Note 5) | 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 | 0.9 | | Vdc | VCE = 0.2 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 | R1/R2 | 0.17 | 0.21 | 0.25 | | | 4 |+| Collector-Emitter Voltage | VCEO | | | 50 | Vdc | | 1 |+| Collector-Base Voltage | VCBO | | | 50 | Vdc | | 1 |+| Collector Current - Continuous | IC | | | 100 | mAdc | | 1 |+| Input Forward Voltage | VIN(fwd) | | | 40 | Vdc | | 1 |+| Input Reverse Voltage | VIN(rev) | | | 6 | Vdc | | 1 |+| Total Device Dissipation (SOT-23, MMUN2114L) | PD | | | 246 | mW | TA = 25°C (Note 1: FR-4 @ Minimum Pad) | 3 |+| Total Device Dissipation (SOT-23, MMUN2114L) | PD | | | 400 | mW | TA = 25°C (Note 2: FR-4 @ 1.0 x 1.0 Inch Pad) | 3 |+| Derate above 25°C (SOT-23, MMUN2114L) | PD | | | 2 | mW/°C | Note 1: FR-4 @ Minimum Pad | 3 |+| Derate above 25°C (SOT-23, MMUN2114L) | PD | | | 3.2 | mW/°C | Note 2: FR-4 @ 1.0 x 1.0 Inch Pad | 3 |+| Thermal Resistance Junction to Ambient (SOT-23, MMUN2114L) | RJA | | | 508 | °C/W | Note 1: FR-4 @ Minimum Pad | 3 |+| Thermal Resistance Junction to Ambient (SOT-23, MMUN2114L) | RJA | | | 311 | °C/W | Note 2: FR-4 @ 1.0 x 1.0 Inch Pad | 3 |+| Thermal Resistance Junction to Lead (SOT-23, MMUN2114L) | RJL | | | 174 | °C/W | Note 1: FR-4 @ Minimum Pad | 3 |+| Thermal Resistance Junction to Lead (SOT-23, MMUN2114L) | 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: `SMMUN2114LT1G`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)+- 3D model files: `smmun2114lt1g-etched.step` / `smmun2114lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smmun2114lt1g.step` / `smmun2114lt1g.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/8589985775120257024) (13 pp, sha256 `da251f7b30a9e9ba`, 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/smmun2114lt1g-datasheet.pdf)
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