component
EMH9
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Changjing Digital Transistors, SOT-563. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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EMH9
Changjing · Digital Transistors · SOT-563
EMH9 from Changjing, in a SOT-563. 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 (ground) of transistor Tr1, per the SOT-563 pin diagram on page 1. |
| 2 | B1 | input | Input (base through built-in R1 of about 10 kΩ) of Tr1; input voltage range -6 to 40 V, VI(off) min 0.3 V, VI(on) max 1.4 V. |
| 3 | C2 | output | Collector (output) of transistor Tr2; supply voltage max 50 V, output current IO 70 mA (IC(MAX) 100 mA). |
| 4 | E2 | passive | Emitter (ground) of transistor Tr2, per the SOT-563 pin diagram on page 1. |
| 5 | B2 | input | Input (base through built-in R1 of about 10 kΩ) of Tr2; input voltage range -6 to 40 V, VI(off) min 0.3 V, VI(on) max 1.4 V. |
| 6 | C1 | output | Collector (output) of transistor Tr1; supply voltage max 50 V, output current IO 70 mA (IC(MAX) 100 mA). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-563 |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | 50 | V | 1 | |||
| Input voltage | VIN | -6 | 40 | V | 1 | ||
| Output current | IO | 70 | mA | 1 | |||
| Output current (maximum) | IC(MAX) | 100 | mA | 1 | |||
| Power dissipation | Pd | 150 | mW | TOTAL | 1 | ||
| Operation junction and storage temperature range | TJ,Tstg | -55 | 150 | ℃ | 1 | ||
| Input voltage (off) | VI(off) | 0.3 | V | VCC=5V, IO=100µA | 1 | ||
| Input voltage (on) | VI(on) | 1.4 | V | VO=0.3V, IO=1 mA | 1 | ||
| Output voltage (on) | VO(on) | 0.3 | V | IO/II=5mA/0.25mA | 1 | ||
| Input current | II | 0.88 | mA | VI=5V | 1 | ||
| Output current (off) | IO(off) | 0.5 | μA | VCC=50V, VI=0 | 1 | ||
| DC current gain | GI | 68 | VO=5V, IO=5mA | 1 | |||
| Input resistance | R1 | 7 | 10 | 13 | KΩ | 1 | |
| Resistance ratio | R2/R1 | 3.7 | 4.7 | 5.7 | 1 |
CAD (KiCad official)
- Symbol:
EMH9 - Footprint:
Package_TO_SOT_SMD:SOT-563 - 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files:
emh9-etched.step/emh9-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);emh9.step/emh9.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (4 pp, sha256
a9e4d04d6700e132, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).
# EMH9
**Changjing** · Digital Transistors · SOT-563
EMH9 from Changjing, in a SOT-563. 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 (ground) of transistor Tr1, per the SOT-563 pin diagram on page 1. |
| 2 | B1 | input | Input (base through built-in R1 of about 10 kΩ) of Tr1; input voltage range -6 to 40 V, VI(off) min 0.3 V, VI(on) max 1.4 V. |
| 3 | C2 | output | Collector (output) of transistor Tr2; supply voltage max 50 V, output current IO 70 mA (IC(MAX) 100 mA). |
| 4 | E2 | passive | Emitter (ground) of transistor Tr2, per the SOT-563 pin diagram on page 1. |
| 5 | B2 | input | Input (base through built-in R1 of about 10 kΩ) of Tr2; input voltage range -6 to 40 V, VI(off) min 0.3 V, VI(on) max 1.4 V. |
| 6 | C1 | output | Collector (output) of transistor Tr1; supply voltage max 50 V, output current IO 70 mA (IC(MAX) 100 mA). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-563 |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | | | 50 | V | | 1 |
| Input voltage | VIN | -6 | | 40 | V | | 1 |
| Output current | IO | | | 70 | mA | | 1 |
| Output current (maximum) | IC(MAX) | | | 100 | mA | | 1 |
| Power dissipation | Pd | | | 150 | mW | TOTAL | 1 |
| Operation junction and storage temperature range | TJ,Tstg | -55 | | 150 | ℃ | | 1 |
| Input voltage (off) | VI(off) | | | 0.3 | V | VCC=5V, IO=100µA | 1 |
| Input voltage (on) | VI(on) | 1.4 | | | V | VO=0.3V, IO=1 mA | 1 |
| Output voltage (on) | VO(on) | | | 0.3 | V | IO/II=5mA/0.25mA | 1 |
| Input current | II | | | 0.88 | mA | VI=5V | 1 |
| Output current (off) | IO(off) | | | 0.5 | μA | VCC=50V, VI=0 | 1 |
| DC current gain | GI | 68 | | | | VO=5V, IO=5mA | 1 |
| Input resistance | R1 | 7 | 10 | 13 | KΩ | | 1 |
| Resistance ratio | R2/R1 | 3.7 | 4.7 | 5.7 | | | 1 |
## CAD (KiCad official)
- Symbol: `EMH9`
- Footprint: `Package_TO_SOT_SMD:SOT-563`
- 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files: `emh9-etched.step` / `emh9-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `emh9.step` / `emh9.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/8590239418138058752) (4 pp, sha256 `a9e4d04d6700e132`, 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/emh9-datasheet.pdf)