# SBD40120TCTB

**Changjing** · Schottky Diodes · TO-220-3L

SBD40120TCTB from Changjing, in a TO-220-3L. 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 | ANODE | passive | Anode terminal of the Schottky barrier rectifier; the device is rated for VRRM 120 V and average rectified output current IO of 40 A (2×20 A). |
| 2 | CATHODE | passive | Cathode terminal of the Schottky barrier rectifier, common to both diode anodes; the device is rated for VRRM 120 V and IO 40 A (2×20 A). |
| 3 | ANODE | passive | Anode terminal of the Schottky barrier rectifier; the device is rated for VRRM 120 V and average rectified output current IO of 40 A (2×20 A). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-220-3L |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak repetitive reverse voltage | VRRM |  |  | 120 | V |  | 1 |
| RMS reverse voltage | VR(RMS) |  |  | 84 | V |  | 1 |
| Average rectified output current | IO |  |  | 40 | A |  | 1 |
| Non-repetitive peak forward surge current | IFSM |  |  | 250 | A | 8.3ms half sine wave | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Reverse voltage | V(BR) | 120 |  |  | V | IR=0.1mA | 1 |

## CAD (KiCad official)

- Symbol: `SBD40120TCTB`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220-3L (KiCad packages3D, STEP)
- 3D model files: `sbd40120tctb-etched.step` / `sbd40120tctb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sbd40120tctb.step` / `sbd40120tctb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603140465570947072) (4 pp, sha256 `28e315ac6c5edd27`, 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/sbd40120tctb-datasheet.pdf)