# DSR1D

**Changjing** · Diodes - General Purpose · SOD-123FL

DSR1D from Changjing, in a SOD-123FL. 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, marked by the color band on the package; the diode conducts when the anode is positive relative to this pin. |
| 2 | A | passive | Anode terminal of the rectifier diode (DSR1D: 200V VRRM, 1A average forward current). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOD-123FL |
| Category | Diodes |
| 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 |  |  | 200 | V |  | 1 |
| Maximum RMS Voltage | VRMS |  |  | 140 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 200 | V |  | 1 |
| Average Forward Current | IF(AV) |  |  | 1 | A | 60Hz Half-sine wave, Resistance load | 1 |
| Surge (Non-repetitive) Forward Current | IFSM |  |  | 25 | A | 60Hz Half-sine wave, 1 cycle, Ta=25℃ | 1 |
| Junction Temperature | TJ | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Maximum Peak Forward Voltage | VF |  |  | 1 | V | IF=1.0A | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | Thermal resistance from junction to ambient and from junction to lead mounted on P.C.B. with 0.2" x 0.2" (5.0 mm x 5.0 mm) copper | 1 |

## CAD (KiCad official)

- Symbol: `DSR1D`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `dsr1d-etched.step` / `dsr1d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dsr1d.step` / `dsr1d.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/dsr1d-datasheet.pdf) (4 pp, sha256 `2cd26b7ef7bd850e`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/dsr1d-datasheet.pdf)