component
UMA5N
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Changjing Digital Transistors, SOT-353. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.
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UMA5N
Changjing · Digital Transistors · SOT-353
UMA5N from Changjing, in a SOT-353. 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 | IN1 | input | Input of the first PNP digital transistor (DTA123J), connected through built-in R1 (1.54 to 2.86 kΩ) to the base, with Vi rated -12 to +5 V. |
| 2 | E | passive | Common emitter of both PNP digital transistors, with the built-in R2 (R2/R1 = 17 to 26) connected between base and emitter, and supply voltage rated -50 V. |
| 3 | IN2 | input | Input of the second PNP digital transistor (DTA123J), connected through built-in R1 (1.54 to 2.86 kΩ) to the base, with Vi rated -12 to +5 V. |
| 4 | OUT2 | passive | Collector output of the second transistor, rated for output current of -100 mA maximum and VCC of -50 V. |
| 5 | OUT1 | passive | Collector output of the first transistor, rated for output current of -100 mA maximum and VCC of -50 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-353 |
| Category | Transistors/Thyristors |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input turn-on voltage | Vi(on) | -1.1 | V | VO=-0.3V, IO=-5mA | 1 | ||
| Input cut-off voltage | Vi(off) | -0.5 | V | VCC=-5V, IO=-100µA | 1 | ||
| Output voltage | VO(on) | -0.3 | V | IO=-5mA, Ii=-0.25 mA | 1 | ||
| Input cut-off current | Ii | -3.6 | mA | Vi=-5V | 1 | ||
| Output cut-off current | IO(off) | -0.5 | µA | VCC=-50V, Vi=0 | 1 | ||
| DC current gain | Gi | 80 | VO=-5V, IO=-10mA | 1 | |||
| Input resistance | R1 | 1.54 | 2.86 | KΩ | 1 | ||
| Resistance ratio | R2/R1 | 17 | 26 | 1 | |||
| Transition frequency | fT | 250 | MHz | VO=-10V, IO=-5mA, f=100MHz | 1 | ||
| Supply voltage | VCC | -50 | V | 1 | |||
| Output current | IC(MAX) | -100 | mA | 1 | |||
| Input voltage | Vi | -12 | 5 | V | 1 | ||
| Power dissipation | PD | 150 | mW | 1 | |||
| Operating junction and storage temperature range | TJ,Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
UMA5N - Footprint:
Package_TO_SOT_SMD:SOT-353_SC-70-5 - 3D model: SOT-353 (KiCad packages3D, STEP)
- 3D model files:
uma5n-etched.step/uma5n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uma5n.step/uma5n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
8cb50ac0ce68caa6, retrieved 2026-10-22, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# UMA5N
**Changjing** · Digital Transistors · SOT-353
UMA5N from Changjing, in a SOT-353. 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 | IN1 | input | Input of the first PNP digital transistor (DTA123J), connected through built-in R1 (1.54 to 2.86 kΩ) to the base, with Vi rated -12 to +5 V. |
| 2 | E | passive | Common emitter of both PNP digital transistors, with the built-in R2 (R2/R1 = 17 to 26) connected between base and emitter, and supply voltage rated -50 V. |
| 3 | IN2 | input | Input of the second PNP digital transistor (DTA123J), connected through built-in R1 (1.54 to 2.86 kΩ) to the base, with Vi rated -12 to +5 V. |
| 4 | OUT2 | passive | Collector output of the second transistor, rated for output current of -100 mA maximum and VCC of -50 V. |
| 5 | OUT1 | passive | Collector output of the first transistor, rated for output current of -100 mA maximum and VCC of -50 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-353 |
| Category | Transistors/Thyristors |
| Pins | 5 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input turn-on voltage | Vi(on) | | | -1.1 | V | VO=-0.3V, IO=-5mA | 1 |
| Input cut-off voltage | Vi(off) | | | -0.5 | V | VCC=-5V, IO=-100µA | 1 |
| Output voltage | VO(on) | | | -0.3 | V | IO=-5mA, Ii=-0.25 mA | 1 |
| Input cut-off current | Ii | | | -3.6 | mA | Vi=-5V | 1 |
| Output cut-off current | IO(off) | | | -0.5 | µA | VCC=-50V, Vi=0 | 1 |
| DC current gain | Gi | 80 | | | | VO=-5V, IO=-10mA | 1 |
| Input resistance | R1 | 1.54 | | 2.86 | KΩ | | 1 |
| Resistance ratio | R2/R1 | 17 | | 26 | | | 1 |
| Transition frequency | fT | | 250 | | MHz | VO=-10V, IO=-5mA, f=100MHz | 1 |
| Supply voltage | VCC | | | -50 | V | | 1 |
| Output current | IC(MAX) | | | -100 | mA | | 1 |
| Input voltage | Vi | -12 | | 5 | V | | 1 |
| Power dissipation | PD | | | 150 | mW | | 1 |
| Operating junction and storage temperature range | TJ,Tstg | -55 | | 150 | ℃ | | 1 |
## CAD (KiCad official)
- Symbol: `UMA5N`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SOT-353 (KiCad packages3D, STEP)
- 3D model files: `uma5n-etched.step` / `uma5n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uma5n.step` / `uma5n.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590931049465520128) (4 pp, sha256 `8cb50ac0ce68caa6`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/uma5n-datasheet.pdf)