# SBD20120TCTB

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

SBD20120TCTB 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 SBD20120TCTB Schottky barrier rectifier (TO-220-3L); the datasheet lists pins 1 and 3 both as ANODE. |
| 2 | CATHODE | passive | Cathode terminal of the Schottky barrier rectifier, rated for a 120 V peak repetitive reverse voltage (VRRM) with 20 A total average rectified output current (IO 20 (2×10) A). |
| 3 | ANODE | passive | Anode terminal of the Schottky barrier rectifier; the datasheet lists it together with pin 1 as ANODE. |

## 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 |
| Working peak reverse voltage | VRWM |  |  | 120 | V |  | 1 |
| DC blocking voltage | VR |  |  | 120 | V |  | 1 |
| Average rectified output current | IO |  |  | 20 | A | (2×10) A as printed | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance from junction to ambient | RΘJA |  |  | 62.5 | ℃/W |  | 1 |
| Thermal resistance from junction to case | RΘJc |  |  | 3 | ℃/W | Tc=25℃ | 1 |
| Reverse voltage | V(BR) | 120 |  |  | V | IR=100uA | 1 |
| Forward voltage | VF |  | 0.66 |  | V | Tj=125℃ | 1 |

## CAD (KiCad official)

- Symbol: `SBD20120TCTB`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220-3L (KiCad packages3D, STEP)
- 3D model files: `sbd20120tctb-etched.step` / `sbd20120tctb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sbd20120tctb.step` / `sbd20120tctb.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/8590227932444078080) (4 pp, sha256 `80254051d921b4ea`, retrieved 2026-10-17, 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/sbd20120tctb-datasheet.pdf)