# BCA120S40D2

**Bestirpower** · SiC Diodes · TO-247-2

BCA120S40D2 from Bestirpower, in a TO-247-2. 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, connected internally to the case/tab; repetitive peak reverse voltage 1200 V, forward current 40 A at TC = 150℃. |
| 2 | A | passive | Anode of the SiC Schottky diode; forward voltage 1.39 V typ (1.70 V max) at IF = 40 A, TC = 25℃. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Bestirpower |
| Package | TO-247-2 |
| Category | Silicon Carbide (SiC) Devices |
| Pins | 2 |

## 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 Voltage | VRRM |  |  | 1200 | V |  | 1 |
| Forward Current | IF |  |  | 115 | A | TC = 25℃ | 1 |
| Forward Current |  |  |  | 50 | A | TC = 135℃ | 1 |
| Forward Current |  |  |  | 40 | A | TC = 150℃ | 1 |
| Non-Repetitive Forward Surge Current | IF,SM |  |  | 345 | A | TC = 25℃, tp = 10 ms | 1 |
| Non-Repetitive Forward Surge Current | IF,SM |  |  | 200 | A | TC = 110℃, tp = 10 ms | 1 |
| Non-Repetitive Peak Forward Current | IF,Max |  |  | 1570 | A | TC = 25℃, tp = 10 μs | 1 |
| Non-Repetitive Peak Forward Current | IF,Max |  |  | 1335 | A | TC = 150℃, tp = 10 μs | 1 |
| I2dt value | I2dt |  |  | 253 | A2s | TC = 25℃, tp = 10 ms | 1 |
| I2dt value | I2dt |  |  | 182 | A2s | TC = 150℃, tp = 10 ms | 1 |
| Power Dissipation | Ptot |  |  | 556 | W | TC = 25℃ | 1 |
| Operating Junction and Storage Temperature | TJ,TSTG | -55 |  | 175 | ℃ |  | 1 |
| Thermal Resistance, Junction to Case | RθJC |  |  | 0.27 | ℃/W |  | 1 |
| Forward Voltage | VF |  | 1.39 | 1.7 | V | IF = 40 A, TC = 25℃ | 2 |
| Forward Voltage | VF |  | 1.8 |  | V | IF = 40 A, TC = 175℃ | 2 |
| Reverse Current | IR |  | 10 | 100 | μA | VR = 1200 V, TC = 25℃ | 2 |
| Reverse Current | IR |  |  | 300 | μA | VR = 1200 V, TC = 175℃ | 2 |

## CAD (KiCad official)

- Symbol: `BCA120S40D2`
- Footprint: `Package_TO_SOT_THT:TO-247-2_Vertical`
- 3D model: TO-247-2 (KiCad packages3D, STEP)
- 3D model files: `bca120s40d2-etched.step` / `bca120s40d2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bca120s40d2.step` / `bca120s40d2.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Bestirpower datasheet](docs/bca120s40d2-datasheet.pdf) (6 pp, sha256 `1fa8a46e34839f95`, retrieved 2026-10-16, 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/bca120s40d2-datasheet.pdf)