# 12L100SP

**YFW** · Schottky Diodes · TO-277

12L100SP from YFW, in a TO-277. 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 | A1 | passive | Anode terminal of the Schottky rectifier (pin 1); 100 V reverse voltage, 12 A average forward current per diode. |
| 2 | A2 | passive | Anode terminal (pin 2), shown tied to the same anode as pin 1 in the diode symbol; 12 A average forward current per diode. |
| 3 | K | passive | Cathode terminal (pin 3), the exposed tab marked K on the package; 100 V maximum repetitive peak reverse voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | TO-277 |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM |  |  | 100 | V | Ta=25°C, per leg | 1 |
| Maximum RMS voltage | VRMS |  |  | 100 | V | Ta=25°C, per leg | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 100 | V | Ta=25°C, per leg | 1 |
| Maximum Average Forward Rectified Current per diode | IF(AV) |  |  | 12 | A | Ta=25°C, per diode | 1 |
| Peak Forward Surge Current, 8.3ms single half sine-wave superimposed on rated load per diode | IFSM |  |  | 200 | A | 8.3 ms single half sine-wave superimposed on rated load, per diode | 1 |
| Operating Temperature Range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 1 |
| Typical Thermal Resistance per diode (mounted on FR-4 PCB), TO-277 | RθJC |  | 72 |  | °C/W | Per diode, mounted on FR-4 PCB, TO-277 | 1 |
| Forward Voltage Drop, IF=12A, TA=25°C | VF |  | 0.64 | 0.66 | V | IF=12A, TA=25°C, per diode; pulse test 300 µs, 1% duty cycle | 1 |
| Forward Voltage Drop, IF=12A, TA=125°C | VF |  | 0.59 | 0.65 | V | IF=12A, TA=125°C, per diode; pulse test 300 µs, 1% duty cycle | 1 |
| Instantaneous reverse current per diode at rated reverse voltage, TA=25°C | IR |  | 20 | 80 | uA | TA=25°C, per diode, at rated reverse voltage | 1 |
| Instantaneous reverse current per diode at rated reverse voltage, TA=125°C | IR |  |  | 20 | mA | TA=125°C, per diode, at rated reverse voltage | 1 |

## CAD (KiCad official)

- Symbol: `12L100SP`
- Footprint: `Package_TO_SOT_SMD:TO-277A`
- 3D model: TO-277 (KiCad packages3D, STEP)
- 3D model files: `12l100sp-etched.step` / `12l100sp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `12l100sp.step` / `12l100sp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590905592112361472) (3 pp, sha256 `8987e99a09e9f757`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/12l100sp-datasheet.pdf)