component
HER308
Public Made by Adomby adom
MDD（Microdiode Electronics） High Effic Rectifier, DO-201AD. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHER308
MDD（Microdiode Electronics） · High Effic Rectifier · DO-201AD
HER308 from MDD（Microdiode Electronics）, in a DO-201AD. 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: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MDD（Microdiode Electronics） |
| Package | DO-201AD |
| 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 | 1000 | V | 1 | |||
| Maximum DC blocking voltage | VDC | 1000 | V | 1 | |||
| Maximum RMS voltage | VRMS | 700 | V | 1 | |||
| Maximum average forward rectified current | I(AV) | 3 | A | 0.375in (9.5mm) lead length at TA=50°C | 1 | ||
| Peak forward surge current | IFSM | 140 | A | 8.3ms single half sine-wave superimposed on rated load (JEDEC Method) | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -65 | 150 | °C | 1 | ||
| Maximum instantaneous forward voltage | VF | 1.7 | V | at 3.0A | 1 | ||
| Maximum DC reverse current | IR | 5 | μA | TA=25°C, at rated DC blocking voltage | 1 | ||
| Maximum DC reverse current | IR | 150 | μA | TA=100°C, at rated DC blocking voltage | 1 | ||
| Maximum reverse recovery time | trr | 70 | ns | IF=0.5A, IR=1.0A, Irr=0.25A (NOTE 1) | 1 | ||
| Typical junction capacitance | CJ | 50 | pF | Measured at 1MHz and applied reverse voltage of 4.0V D.C. (NOTE 2) | 1 | ||
| Typical thermal resistance, junction to ambient | RθJA | 20 | °C/W | 0.375in (9.5mm) lead length, P.C.B. mounted (NOTE 3) | 1 |
CAD (KiCad official)
- Symbol:
HER308 - Footprint:
Diode_THT:D_DO-201AD_P15.24mm_Horizontal - 3D model: DO-201AD (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MDD（Microdiode Electronics） datasheet (3 pp, sha256
c219567279ec0d39, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarycathode-band convention(convention), consensusoff(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).