UMY1N

Changjing · Bipolar (BJT) · SOT-353

UMY1N 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	B1	input	Base of the left-hand transistor in the schematic (Tr1 PNP 2SA1037AK or Tr2 NPN 2SC2412K), with Tr1 limits of VEBO -6 V and IC -150 mA.
2	E	passive	Common emitter of the PNP and NPN transistors (shared between Tr1 and Tr2).
3	B2	input	Base of the right-hand transistor in the schematic, with Tr2 limits of VEBO 7 V and IC 150 mA if NPN.
4	C2	passive	Collector of the right-hand transistor in the schematic, with VCEO of 50 V (Tr2) or -50 V (Tr1) and IC of 150 mA max.
5	C1	passive	Collector of the left-hand transistor in the schematic, with VCEO of 50 V (Tr2) or -50 V (Tr1) and IC of 150 mA max.

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	SOT-353
Category	Transistors/Thyristors
Pins	5

CAD (KiCad official)

Symbol: UMY1N
Footprint: Package_TO_SOT_SMD:SOT-353_SC-70-5
3D model: SOT-353 (KiCad packages3D, STEP)
3D model files: umy1n-etched.step / umy1n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); umy1n.step / umy1n.glb are the bare package body.

Provenance

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

Datasheet: Changjing datasheet (4 pp, sha256 6444239c419c9fb7, retrieved 2026-10-09, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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

# UMY1N

**Changjing** · Bipolar (BJT) · SOT-353

UMY1N 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 | B1 | input | Base of the left-hand transistor in the schematic (Tr1 PNP 2SA1037AK or Tr2 NPN 2SC2412K), with Tr1 limits of VEBO -6 V and IC -150 mA. |
| 2 | E | passive | Common emitter of the PNP and NPN transistors (shared between Tr1 and Tr2). |
| 3 | B2 | input | Base of the right-hand transistor in the schematic, with Tr2 limits of VEBO 7 V and IC 150 mA if NPN. |
| 4 | C2 | passive | Collector of the right-hand transistor in the schematic, with VCEO of 50 V (Tr2) or -50 V (Tr1) and IC of 150 mA max. |
| 5 | C1 | passive | Collector of the left-hand transistor in the schematic, with VCEO of 50 V (Tr2) or -50 V (Tr1) and IC of 150 mA max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-353 |
| Category | Transistors/Thyristors |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `UMY1N`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SOT-353 (KiCad packages3D, STEP)
- 3D model files: `umy1n-etched.step` / `umy1n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `umy1n.step` / `umy1n.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/8590223284639076352) (4 pp, sha256 `6444239c419c9fb7`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/umy1n-datasheet.pdf)