# SR340L

**NH** · Schottky Diodes · DO-27

SR340L from NH, in a DO-27. 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 white band on the package body; the axial lead on the banded end. |
| 2 | A | passive | Anode, the axial lead opposite the white cathode band; device is rated 3 A average forward current and 40 V maximum repetitive peak reverse voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NH |
| Package | DO-27 |
| 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 |  |  | 40 | V |  | 1 |
| Maximum RMS voltage | VRMS |  |  | 28 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 40 | V |  | 1 |
| Maximum average forward rectified current | IF(AV) |  |  | 3 | A | TA=125℃ | 1 |
| Peak forward surge current | IFSM |  |  | 70 | A | 8.3ms single half sine-wave superimposed on rated load | 1 |
| Operating junction temperature | TJ | -65 |  | 150 | ℃ |  | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | ℃ |  | 1 |
| Maximum instantaneous forward voltage (25℃) | VF |  | 0.45 | 0.53 | V | IF=3 A, TA=25℃ | 1 |
| Maximum instantaneous forward voltage (125℃) | VF |  | 0.4 | 0.46 | V | IF=3 A, TA=125℃ | 1 |
| Maximum instantaneous reverse current (25℃) | IR |  |  | 20 | uA | VR=VRRM, TA=25℃ | 1 |
| Maximum instantaneous reverse current (125℃) | IR |  | 50 | 100 | mA | VR=80%*VRRM, TA=125℃ | 1 |
| Typical junction capacitance | CJ |  | 65 |  | pF | 4V, 1MHz | 1 |
| Typical thermal resistance, junction to ambient | RθJA |  | 25 |  | ℃/W |  | 1 |
| Typical thermal resistance, junction to lead | RθJL |  | 8 |  | ℃/W |  | 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 |  | 2. Thermal resistance from junction to lead vertical P.C.B. mounted , 0.375"(9.5mm)lead length,Polymide PCB, 2 oz Copper. | 1 |

## CAD (KiCad official)

- Symbol: `SR340L`
- Footprint: `Diode_THT:D_DO-27_P15.24mm_Horizontal`
- 3D model: DO-27 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [NH datasheet](docs/sr340l-datasheet.pdf) (5 pp, sha256 `aa101c6919d56554`, 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/sr340l-datasheet.pdf)