# SF26

**LangJie** · Fast Recovery / High Efficiency Diodes · DO-15

SF26 from LangJie, in a DO-15. 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 axial package; SF26 blocks up to 600 V repetitive peak reverse voltage. |
| 2 | A | passive | Anode, the axial lead opposite the color band; SF26 passes 2.0 A average forward current at TA=75℃ with 0.375" lead length. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LangJie |
| Package | DO-15 |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM |  |  | 600 | V |  | 1 |
| Maximum RMS Voltage | VRMS |  |  | 420 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 600 | V |  | 1 |
| Maximum Average Forward Rectified Current | I(AV) |  |  | 2 | A | 0.375" (9.5mm) lead length, TA=75℃ | 1 |
| Peak Forward Surge Current | IFSM |  |  | 50 | A | 8.3mS single half sine wave superimposed on rated load (JEDEC method) | 1 |
| Maximum Instantaneous Forward Voltage | VF |  |  | 1.7 | V | at 2.0A | 1 |
| Maximum DC Reverse Current | IR |  |  | 5 | µA | rated DC blocking voltage, TA=25℃ | 1 |
| Maximum DC Reverse Current | IR |  |  | 50 | µA | rated DC blocking voltage, TA=125℃ | 1 |
| Maximum Reverse Recovery Time | TRR |  |  | 35 | nS | If=0.5A, Ir=1.0A, Irr=0.25A | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Typical Junction Capacitance | CJ |  | 25 |  | pF | 1.0MHz, applied reverse voltage 4.0V | 1 |
| Typical Thermal Resistance | RθJA |  | 50 |  | ℃/W | Junction to ambient, 0.375" (9.5mm) lead length, PCB mounted | 1 |

## CAD (KiCad official)

- Symbol: `SF26`
- Footprint: `Diode_THT:D_DO-15_P12.70mm_Horizontal`
- 3D model: DO-15 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [LangJie datasheet](docs/sf26-datasheet.pdf) (5 pp, sha256 `541a4a00bef15f86`, retrieved 2026-10-22, 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/sf26-datasheet.pdf)