# TYN1225RG-JSM

**JSMSEMI** · Thyristors (SCR)/Modules · TO-220

TYN1225RG-JSM from JSMSEMI, in a TO-220. 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 | passive | Cathode of the SCR, the current return terminal; the device is rated for 25 A RMS on-state current (IT(RMS)) and 16 A average (IT(AV)) at Tc=96℃. |
| 2 | A | passive | Anode of the SCR, also connected to the metal tab; VDRM and VRRM are rated at 1200 V. |
| 3 | G | input | Gate trigger input; IGT is 40 mA max and VGT is 1.5 V max at VD=12 V, RL=33 Ω. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | TO-220 |
| 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 off-state voltage | VDRM |  |  | 1200 | V |  | 1 |
| Repetitive peak reverse voltage | VRRM |  |  | 1200 | V |  | 1 |
| Average forward current | IT(AV) |  |  | 16 | A | Tc=96℃ | 1 |
| RMS on-state current | IT(RMS) |  |  | 25 | A |  | 1 |
| Surge non-repetitive on-state current | ITSM |  |  | 260 | A | 50HZ, 1/2 cycle, sine wave; Tc=45℃ | 1 |
| Surge non-repetitive on-state current | ITSM |  |  | 250 | A | 60HZ, 1/2 cycle, sine wave; Tc=45℃ | 1 |
| Average gate power dissipation | PG(AV) |  |  | 0.5 | W |  | 1 |
| Operating junction temperature | Tj | -40 |  | 125 | ℃ |  | 1 |
| Storage temperature | Tstg | -40 |  | 150 | ℃ |  | 1 |
| Repetitive peak reverse current | IRRM |  |  | 0.01 | mA | VRM=VRRM, VDM=VDRM, Tj=25℃ | 1 |
| Repetitive peak reverse current | IRRM |  |  | 4 | mA | VRM=VRRM, VDM=VDRM, Tj=125℃ | 1 |
| On-state voltage | VTM |  |  | 1.6 | V | ITM=50A; tp=380μs | 1 |
| Gate-trigger current | IGT |  |  | 40 | mA | VD=12V; RL=33Ω | 1 |
| Gate-trigger voltage | VGT |  |  | 1.5 | V | VD=12V; RL=33Ω | 1 |
| Thermal resistance, junction to case | Rth(j-c) |  |  | 1.3 | ℃/W | Junction to case | 1 |

## CAD (KiCad official)

- Symbol: `TYN1225RG-JSM`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `tyn1225rg-jsm-etched.step` / `tyn1225rg-jsm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tyn1225rg-jsm.step` / `tyn1225rg-jsm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](docs/tyn1225rg-jsm-datasheet.pdf) (2 pp, sha256 `320ab25dab21b75a`, retrieved 2026-11-04, 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/tyn1225rg-jsm-datasheet.pdf)