# LMSD103AT1G

**LRC** · Schottky Diodes · SOD-123

LMSD103AT1G from LRC, in a SOD-123. 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 | CATHODE | passive | Cathode terminal, identified by the cathode band on the package; the datasheet gives no pin-specific limits, so the device maximum ratings (for example 40 V VRRM and 350 mA forward current for the LMSD103AT1G) apply. |
| 2 | ANODE | passive | Anode terminal; the datasheet gives no pin-specific limits, so the device maximum ratings and forward characteristics at 25 °C apply. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOD-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage (LMSD103AT1G variant) | V(BR)R | 40 |  |  | V | IR = 100A | 1 |
| Forward Voltage Drop | VFM |  |  | 0.37 | V | IF = 20mA | 1 |
| Forward Voltage Drop | VFM |  |  | 0.6 | V | IF = 200mA | 1 |
| Peak Reverse Current (LMSD103AT1G variant) | IRM |  |  | 5 | µA | VR = 30V | 1 |
| Peak Repetitive Reverse Voltage (LMSD103AT1G) | VRRM |  |  | 40 | V |  | 1 |
| Working Peak Reverse Voltage (LMSD103AT1G) | VRWM |  |  | 40 | V |  | 1 |
| DC Blocking Voltage (LMSD103AT1G) | VR |  |  | 40 | V |  | 1 |
| RMS Reverse Voltage (LMSD103AT1G) | VR(RMS) |  |  | 28 | V |  | 1 |
| Forward Continuous Current | IFM |  |  | 350 | mA | Note 1 | 1 |
| Non-Repetitive Peak Forward Surge Current | IFSM |  |  | 1.5 | A | t 1.0s | 1 |
| Power Dissipation | Pd |  |  | 400 | mW | Note 1 | 1 |
| Thermal Resistance, Junction to Ambient Air | RJA |  |  | 300 | C/W | Note 1: part mounted on FR-4 board with recommended pad layout | 1 |
| Operating and Storage Temperature Range | Tj, TSTG | -65 |  | 125 | C |  | 1 |
| Total Capacitance | CT |  | 28 |  | pF | VR = 0V, f = 1.0MHz | 1 |
| Reverse Recovery Time | trr |  | 10 |  | ns | IF = IR = 200mA, Irr = 0.1 x IR, RL = 100 | 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 |  | tin | Also Available in Lead Free Plating (Matte Tin Finish). Please See | 1 |

## CAD (KiCad official)

- Symbol: `LMSD103AT1G`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `lmsd103at1g-etched.step` / `lmsd103at1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmsd103at1g.step` / `lmsd103at1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586176170409283584) (3 pp, sha256 `e2c275a27bcb37aa`, 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/lmsd103at1g-datasheet.pdf)