# TN1215-800B

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

TN1215-800B from JSMSEMI, 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 | passive | Cathode (K) of the unidirectional SCR, which carries the on-state current up to IT(RMS) 12 A at Tc=90℃. |
| 2 | A | passive | Anode (A2), connected to the tab, which blocks VDRM/VRRM of 800 V at Tj=25℃. |
| 3 | G | input | Gate trigger input: IGT max 15 mA and VGT max 1.5 V at VD=12V, RL=100Ω, with peak gate current IGM 4 A (tp=20us). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| 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 |
|---|---|---|---|---|---|---|---|
| RMS on-state current (Tc=90℃) | IT(RMS) |  |  | 12 | A | Tc=90℃ | 1 |
| Non-repetitive surge on-state current | ITSM |  |  | 120 | A | F=50HZ, t=20ms | 1 |
| I2t limit value | I2t |  |  | 144 | A2S | tp=10ms | 1 |
| Critical rate of rise of on-state current | di/dt |  |  | 50 | A/us | Tj=125℃ | 1 |
| Repetitive peak off-state and reverse voltage | VDRM/VRRM |  |  | 800 | V | Tj=25℃ | 1 |
| Peak gate current | IGM |  |  | 4 | A | tp=20us, Tj=125℃ | 1 |
| Average gate power dissipation | PG(AV) |  |  | 1 | W | Tj=125℃ | 1 |
| Storage temperature | Tstg | -40 |  | 150 | ℃ |  | 1 |
| Effective junction temperature | Tj | -40 |  | 125 | ℃ |  | 1 |
| Gate trigger current | IGT |  |  | 15 | mA | VD=12V RL=100Ω, quadrant I | 2 |
| Gate trigger voltage | VGT |  |  | 1.5 | V | VD=12V RL=100Ω, quadrant I | 2 |
| Gate non-trigger voltage | VGD | 0.2 |  |  | V | Tj=125℃ | 2 |
| Holding current | IH |  |  | 30 | mA | IT=0.5A | 2 |
| Latching current | IL |  |  | 40 | mA | IG=1.2IGT, quadrant I | 2 |
| Critical rate of rise of off-state voltage | dv/dt | 500 |  |  | V/us | VD=2/3VDRM, Tj=125℃ | 2 |
| Peak on-state voltage | VTM |  |  | 1.5 | V | ITM=36A, Tj=25℃ | 2 |
| Threshold voltage | VT0 |  |  | 0.86 | V | Tj=125℃ | 2 |
| Slope resistance | Rd |  |  | 36.6 | mΩ | Tj=125℃ | 2 |
| Peak off-state current | IDRM |  |  | 5 | uA | Tj=25℃ | 2 |
| Peak reverse current | IRRM |  |  | 1 | mA | Tj=125℃ | 2 |
| Junction-to-case thermal resistance | Rth(j-c) |  |  | 1.75 | ℃/W | BTB | 2 |

## CAD (KiCad official)

- Symbol: `TN1215-800B`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `tn1215-800b-etched.step` / `tn1215-800b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tn1215-800b.step` / `tn1215-800b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590227422873485312) (6 pp, sha256 `260b6b7415cd48ee`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/tn1215-800b-datasheet.pdf)