# UMZ1N

**Changjing** · Bipolar (BJT) · SOT-363

UMZ1N from Changjing, in a SOT-363. 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 | E1 | passive | Emitter of TR1 (NPN, 2SC2412K), with VEBO rated 7 V and IC rated 0.15 A continuous. |
| 2 | B1 | passive | Base of TR1 (NPN), with VCBO rated 60 V and VEBO rated 7 V. |
| 3 | C2 | passive | Collector of TR2 (PNP, 2SA1037AK), with VCBO of -60 V, VCEO of -50 V and IC of -0.15 A continuous. |
| 4 | E2 | passive | Emitter of TR2 (PNP), with VEBO rated -6 V. |
| 5 | B2 | passive | Base of TR2 (PNP), with VCBO rated -60 V and VEBO rated -6 V. |
| 6 | C1 | passive | Collector of TR1 (NPN), with VCBO of 60 V, VCEO of 50 V and IC of 0.15 A continuous. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-363 |
| Category | Transistors/Thyristors |
| Pins | 6 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| TR1 NPN Collector-emitter saturation voltage | VCE(sat) |  |  | 0.4 | V | IC=50mA,IB=5mA | 2 |
| TR1 NPN Collector cut-off current | ICBO |  |  | 0.1 | μA | VCB=60V,IE=0 | 2 |
| TR1 NPN Emitter cut-off current | IEBO |  |  | 0.1 | μA | VEB=7V,IC=0 | 2 |
| TR1 NPN Collector-base breakdown voltage | V(BR)CBO | 60 |  |  | V | IC=50μA,IE=0 | 2 |
| TR1 NPN Collector-emitter breakdown voltage | V(BR)CEO | 50 |  |  | V | IC=1mA,IB=0 | 2 |
| TR1 NPN Emitter-base breakdown voltage | V(BR)EBO | 7 |  |  | V | IE=50μA,IC=0 | 2 |
| TR1 NPN DC current gain | hFE | 120 |  | 560 |  | VCE=6V,IC=1mA | 2 |
| TR1 NPN Transition frequency | fT | 180 |  |  | MHz | VCE=12V,IC=2mA,f=100MHz | 2 |
| TR1 NPN Collector output capacitance | Cob |  | 2 | 3.5 | pF | VCB=12V,IE=0,f=1MHz | 2 |
| TR1 PNP Collector-emitter saturation voltage | VCE(sat) |  |  | -0.5 | V | IC=-50mA,IB=-5mA | 2 |
| TR1 PNP Collector cut-off current | ICBO |  |  | -0.1 | μA | VCB=-60V,IE=0 | 2 |
| TR1 PNP Emitter cut-off current | IEBO |  |  | -0.1 | μA | VEB=-6V,IC=0 | 2 |
| TR1 PNP Collector-base breakdown voltage | V(BR)CBO | -60 |  |  | V | IC=-50μA,IE=0 | 2 |
| TR1 PNP Collector-emitter breakdown voltage | V(BR)CEO | -50 |  |  | V | IC=-1mA,IB=0 | 2 |
| TR1 PNP Emitter-base breakdown voltage | V(BR)EBO | -6 |  |  | V | IE=-50μA,IC=0 | 2 |
| TR1 PNP DC current gain | hFE | 120 |  | 560 |  | VCE=-6V,IC=-1mA | 2 |
| TR1 PNP Transition frequency | fT | 140 |  |  | MHz | VCE=-12V,IC=-2mA,f=100MHz | 2 |
| TR1 PNP Collector output capacitance | Cob |  |  | 5 | pF | VCB=-12V,IE=0,f=1MHz | 2 |
| TR1 NPN Collector-Base Voltage (absolute maximum) | VCBO |  |  | 60 | V |  | 1 |
| TR1 NPN Collector-Emitter Voltage (absolute maximum) | VCEO |  |  | 50 | V |  | 1 |
| TR1 NPN Emitter-Base Voltage (absolute maximum) | VEBO |  |  | 7 | V |  | 1 |
| TR1 NPN Collector Current -Continuous (absolute maximum) | IC |  |  | 0.15 | A |  | 1 |
| TR1 NPN Collector Power Dissipation (absolute maximum) | PC |  |  | 0.15 | W |  | 1 |
| TR2 PNP Collector-Base Voltage (absolute maximum) | VCBO |  |  | -60 | V |  | 1 |
| TR2 PNP Collector-Emitter Voltage (absolute maximum) | VCEO |  |  | -50 | V |  | 1 |
| TR2 PNP Emitter-Base Voltage (absolute maximum) | VEBO |  |  | -6 | V |  | 1 |
| TR2 PNP Collector Current -Continuous (absolute maximum) | IC |  |  | -0.15 | A |  | 1 |
| TR2 PNP Collector Power Dissipation (absolute maximum) | PC |  |  | 0.15 | W |  | 1 |
| Operation Junction and Storage Temperature Range (TJ,Tstg) | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `UMZ1N`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `umz1n-etched.step` / `umz1n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `umz1n.step` / `umz1n.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/8589042067935150080) (4 pp, sha256 `25d4b79ead248422`, retrieved 2026-10-18, 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/umz1n-datasheet.pdf)