# 03P4J

**KEXIN** · Thyristors (SCR)/Modules · SOT-89

03P4J from KEXIN, in a SOT-89. 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 | GATE | input | Gate trigger input, with gate trigger current IGT of 200 (unit as printed) at VDM=6V and RL=100Ω, gate forward current IFGM 0.1 A, gate reverse voltage VRGM 6 V, and gate power dissipation PGM 0.1 W. |
| 2 | ANODE | passive | Anode terminal, rated for repetitive peak off-state voltage VDRM 400 V and repetitive reverse voltage VRRM 400 V, with average on-state current IT(AV) 0.3 A. |
| 3 | CATHODE | passive | Cathode terminal, the reference for the gate and anode ratings, with RMS on-state current IT(RSM) 0.47 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEXIN |
| Package | SOT-89 |
| 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 |
|---|---|---|---|---|---|---|---|
| Repetitive Peak Reverse Current (TJ=25) | IRRM |  |  | 10 | µA | VRM=VRRM, TJ=25 | 1 |
| Repetitive Peak Reverse Current (TJ=125) | IRRM |  |  | 100 | µA | VRM=VRRM, TJ=125 | 1 |
| Repetitive Peak Off-state Current (TJ=25) | IDRM |  |  | 10 | µA | VDM=VDRM, TJ=25 | 1 |
| Repetitive Peak Off-state Current (TJ=125) | IDRM |  |  | 100 | µA | VRM=VRRM, TJ=125 | 1 |
| On-state Voltage | VTM |  |  | 1.6 | V | ITM=1A | 1 |
| Gate-Trigger Current | IGT |  |  | 200 | µA | VDM=6V, RL=100Ω | 1 |
| Gate-Trigger Voltage | VGT |  |  | 0.5 | V | VDM=6V, RL=100Ω | 1 |
| Gate Non-Trigger Voltage | VGD | 0.1 |  |  | V | VDM=1/2VDRM, TJ=125 | 1 |
| Critical Rate-of-Rise of Off-state Voltage | dv/dt | 40 |  |  | V/µs | VDM=2/3VDRM, TJ=125 | 1 |
| Holding Current | IH |  |  | 5 | mA | VD=24V, ITM=1A | 1 |
| Thermal Resistance Junction to Ambient | Rth(j-a) |  |  | 65 | °C/W | Junction to Ambient | 1 |
| Non-Repetitive Peak Reverse Voltage | VRSM |  |  | 500 | V |  | 1 |
| Non-Repetitive Peak Off-state Voltage | VDSM |  |  | 500 | V |  | 1 |
| Repetitive Peak Reverse Voltage | VRRM |  |  | 400 | V |  | 1 |
| Repetitive Peak Off-state Voltage | VDRM |  |  | 400 | V |  | 1 |
| Average On-State Current | IT(AV) |  |  | 0.3 | A | TA=77, single phase half wave (footnote *1) | 1 |
| RMS On-State Current | IT(RSM) |  |  | 0.47 | A |  | 1 |
| Surge On-state Current | ITSM |  |  | 6 | A |  | 1 |
| Fusing Current | I2t |  |  | 0.15 | A2s | 1ms t 10ms | 1 |
| Gate Power Dissipation (peak) | PGM |  |  | 0.1 | W | f 50Hz, duty 10% (footnote *2) | 1 |
| Gate Power Dissipation (average) | PG(AV) |  |  | 0.01 | W |  | 1 |
| Gate Forward Current | IFGM |  |  | 0.1 | A | f 50Hz, duty 10% (footnote *2) | 1 |
| Gate Reverse Voltage | VRGM |  |  | 6 | V |  | 1 |
| Junction Temperature | TJ | -55 |  | 125 | °C |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `03P4J`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `03p4j-etched.step` / `03p4j-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `03p4j.step` / `03p4j.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KEXIN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912483720941569) (3 pp, sha256 `ddfa4fea5847dc9e`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/03p4j-datasheet.pdf)