# SR1100

**MDD（Microdiode Electronics）** · Schottky Barrier Diodes (SBD) · DO-41

SR1100 from MDD（Microdiode Electronics）, in a DO-41. 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 is the lead at the end marked by the color band, as stated under Polarity: 'Color band denotes cathode end'. |
| 2 | A | passive | Anode is the unbanded axial lead opposite the cathode band; the family ratings that apply to the SR1100 include VRRM 100 V, I(AV) 1.0 A at 0.375 in lead length, and IFSM 40 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MDD（Microdiode Electronics） |
| Package | DO-41 |
| 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 |  |  | 100 | V |  | 1 |
| Maximum RMS voltage | VRMS |  |  | 70 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 100 | V |  | 1 |
| Maximum average forward rectified current | I(AV) |  |  | 1 | A | 0.375 in (9.5 mm) lead length (see fig.1) | 1 |
| Peak forward surge current | IFSM |  |  | 40 | A | 8.3 ms single half sine-wave superimposed on rated load (JEDEC Method) | 1 |
| Typical thermal resistance | RθJA |  | 50 |  | °C/W | Junction to ambient, 0.375 in (9.5 mm) lead length, P.C.B. mounted (NOTE 2) | 1 |
| Storage temperature range | TSTG | -50 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `SR1100`
- Footprint: `Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal`
- 3D model: DO-41 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [MDD（Microdiode Electronics） datasheet](docs/sr1100-datasheet.pdf) (2 pp, sha256 `83d1d6bbaa9d7553`, retrieved 2026-10-21, 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/sr1100-datasheet.pdf)