component
HER304G-BD
Public Made by Adomby adom
SY(顺烨) , DO-27. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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HER304G-BD
SY(顺烨) · IC · DO-27
HER304G-BD from SY(顺烨), 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 on the end of the body with the polarity band; the datasheet gives the polarity as a symbol marking on the body. |
| 2 | A | passive | Anode, the lead at the end of the body opposite the polarity band; the datasheet gives a 3.0A average forward rectified current at TL=100°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SY(顺烨) |
| Package | DO-27 |
| Category | |
| 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 | 300 | V | HER304G column | 1 | ||
| Maximum RMS voltage | VRMS | 210 | V | HER304G column | 1 | ||
| Maximum DC blocking voltage | VDC | 300 | V | HER304G column | 1 | ||
| Maximum average forward rectified current | I(AV) | 3 | A | at TL=100 C | 1 | ||
| Peak forward surge current | IFSM | 150 | A | 8.3ms single half sine-wave superimposed on rated load | 1 | ||
| Operating junction and storage temperature range | TJ,TSTG | -55 | 150 | C | 1 | ||
| Maximum instantaneous forward voltage | VF | 1 | V | at 3.0A, pulse width 300 us, 1% duty cycle | 1 | ||
| Maximum DC reverse current | IR | 10 | uA | TA=25 C, at rated DC blocking voltage | 1 | ||
| Maximum reverse recovery time | Trr | 50 | ns | IF=0.5A, IR=1.0A, Irr=0.25A | 1 | ||
| Typical junction capacitance | CJ | 70 | pF | Measured at 1MHz and applied reverse voltage of 4.0V D.C. | 1 | ||
| Typical thermal resistance | RqJA | 45 | C/W | 1 | |||
| Soldering temperature at terminals | 250 | C | 10 seconds at terminals | 1 |
CAD (KiCad official)
- Symbol:
HER304G-BD - 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: SY(顺烨) datasheet (2 pp, sha256
c977b519c716eb7f, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# HER304G-BD
**SY(顺烨)** · IC · DO-27
HER304G-BD from SY(顺烨), 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 on the end of the body with the polarity band; the datasheet gives the polarity as a symbol marking on the body. |
| 2 | A | passive | Anode, the lead at the end of the body opposite the polarity band; the datasheet gives a 3.0A average forward rectified current at TL=100°C. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SY(顺烨) |
| Package | DO-27 |
| Category | |
| 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 | | | 300 | V | HER304G column | 1 |
| Maximum RMS voltage | VRMS | | | 210 | V | HER304G column | 1 |
| Maximum DC blocking voltage | VDC | | | 300 | V | HER304G column | 1 |
| Maximum average forward rectified current | I(AV) | | | 3 | A | at TL=100 C | 1 |
| Peak forward surge current | IFSM | | | 150 | A | 8.3ms single half sine-wave superimposed on rated load | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -55 | | 150 | C | | 1 |
| Maximum instantaneous forward voltage | VF | | | 1 | V | at 3.0A, pulse width 300 us, 1% duty cycle | 1 |
| Maximum DC reverse current | IR | | | 10 | uA | TA=25 C, at rated DC blocking voltage | 1 |
| Maximum reverse recovery time | Trr | | | 50 | ns | IF=0.5A, IR=1.0A, Irr=0.25A | 1 |
| Typical junction capacitance | CJ | | 70 | | pF | Measured at 1MHz and applied reverse voltage of 4.0V D.C. | 1 |
| Typical thermal resistance | RqJA | | 45 | | C/W | | 1 |
| Soldering temperature at terminals | | | | 250 | C | 10 seconds at terminals | 1 |
## CAD (KiCad official)
- Symbol: `HER304G-BD`
- 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:** [SY(顺烨) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603367480605614080) (2 pp, sha256 `c977b519c716eb7f`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/her304g-bd-datasheet.pdf)