# X0405

**JUXING** · Thyristors (SCR)/Modules · TO-252

X0405 from JUXING, in a TO-252. 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 | K(1) | passive | Terminal 1 (K), the main-terminal cathode side of the triac symbol; the datasheet gives IT(RMS) 4 A and VDRM/VRRM 600 V for the device. |
| 2 | A(2) | passive | Terminal 2 (A), the main-terminal anode side of the triac symbol, which is also the center lead and the mounting tab; VDRM/VRRM 600 V, ITSM 40 A. |
| 3 | G(3) | input | Gate trigger input; trigger needs IGT up to 200 µA and VGT up to 1.5 V at VD=12 V, RL=100 Ω, with peak gate current IGM 4 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JUXING |
| Package | TO-252 |
| 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 |
|---|---|---|---|---|---|---|---|
| Gate trigger current | IGT |  |  | 200 | µA | VD=12V;RL=100Ω | 2 |
| Gate trigger voltage | VGT |  |  | 1.5 | V | VD=12V;RL=100Ω | 2 |
| Non-triggering gate voltage | VGD |  |  | 0.2 | V | Tj=125℃ | 2 |
| Holding current | IH |  |  | 0.2 | mA | IT=0.5A | 2 |
| Critical rise rate of off-state voltage | dV/dt |  |  | 5 | V/µs | VD=2/3VDRM;Tj=125℃ | 2 |
| Peak on-state voltage | VTM |  |  | 1.8 | V | ITM=8A | 2 |
| Peak forward reverse blocking current | IDRM |  |  | 5 | µA | VD=VDRM/VRRM | 2 |
| Peak forward reverse blocking current | IRRM |  |  | 1 | mA | VD=VDRM/VRRM;Tj=20-125℃ | 2 |
| Repetitive peak off-state voltage | VDRM/VRRM |  |  | 600 | V |  | 1 |
| RMS on-state current (full sine wave) | IT(RMS) |  |  | 4 | A | full sine wave | 1 |
| Non repetitive surge peak on-state current (half sine wave) | ITSM |  |  | 40 | A | Tc=90℃ | 1 |
| Peak gate current | IGM |  |  | 4 | A |  | 1 |
| I2t for fusing | I2t |  |  | 16 | A2S | tp=10ms | 1 |
| Average gate power dissipation | PG(AV) |  |  | 0.5 | W | Tj=125℃ | 1 |
| Repetitive rate of rise of on-state current after triggering | Di/dt |  |  | 50 | A/µs |  | 1 |
| Junction temperature | Tj | -40 |  | 125 | ℃ |  | 1 |
| Storage temperature | Tstg | -40 |  | 150 | ℃ |  | 1 |
| Junction to case (AC) | Rth(j-c) |  |  | 1.25 | ℃/W |  | 2 |

## CAD (KiCad official)

- Symbol: `X0405`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `x0405-etched.step` / `x0405-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `x0405.step` / `x0405.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JUXING datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603358275597987840) (4 pp, sha256 `5fa9bcd6664d62bc`, 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/x0405-datasheet.pdf)