component
ER304
Public Made by Adomby adom
SUNMATE Elec Fast Recovery / High Efficiency Diodes, DO-27. Pinout cross-checked by two models against the datasheet, 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
markdownER304
SUNMATE Elec · Fast Recovery / High Efficiency Diodes · DO-27
ER304 from SUNMATE Elec, 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, the lead at the end marked with the cathode band; ER304 is rated 400V VRRM, 280V VRMS, 400V VDC and 3.0A average forward current. |
| 2 | A | passive | Anode, the lead opposite the cathode band; ER304 has 1.7V maximum forward voltage at 3.0A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SUNMATE Elec |
| 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 recurrent peak reverse voltage | VRRM | 400 | V | 1 | |||
| Maximum RMS voltage | VRMS | 280 | V | 1 | |||
| Maximum DC blocking voltage | VDC | 400 | V | 1 | |||
| Maximum average forward rectified current | IF(AV) | 3 | A | 9.5mm lead length, @TA=75 | 1 | ||
| Maximum instantaneous forward voltage | VF | 1.25 | V | @ 3.0A | 1 | ||
| Operating junction temperature range | TJ | -55 | 150 | °C | 1 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
ER304 - 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: SUNMATE Elec datasheet (2 pp, sha256
2e0057de31627d9a, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).