component
HER304
Public Made by Adomby adom
SUNMATE Elec Fast Recovery / High Efficiency Diodes, DO-27. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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HER304
SUNMATE Elec · Fast Recovery / High Efficiency Diodes · DO-27
HER304 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
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 | 300 | V | 1 | |||
| Maximum DC Blocking Voltage | VDC | 300 | V | 1 | |||
| Maximum RMS Voltage | VRMS | 210 | V | 1 | |||
| Maximum Average Forward Current | IF(AV) | 3 | A | 0.375" (9.5mm) lead length, Ta = 55 °C | 1 | ||
| Maximum Peak Forward Surge Current | IFSM | 150 | A | 8.3ms single half sine wave superimposed on rated load (JEDEC Method) | 1 | ||
| Maximum Forward Voltage | VF | 1.1 | 1.7 | V | IF = 3.0 A | 1 | |
| Maximum DC Reverse Current | IR | 10 | μA | Ta = 25 °C, at rated DC blocking voltage | 1 | ||
| Maximum DC Reverse Current | IR(H) | 50 | μA | Ta = 100 °C, at rated DC blocking voltage | 1 | ||
| Maximum Reverse Recovery Time | Trr | 50 | ns | IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A (Note 1) | 1 | ||
| Typical Junction Capacitance | CJ | 50 | pf | Measured at 1.0 MHz, applied reverse voltage 4.0 VDC (Note 2) | 1 | ||
| Junction Temperature Range | TJ | -65 | 150 | °C | 1 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 1 |
CAD (KiCad official)
- Symbol:
HER304 - 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
d5e566dbf7ec9f12, retrieved 2026-10-15, 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).
# HER304
**SUNMATE Elec** · Fast Recovery / High Efficiency Diodes · DO-27
HER304 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 banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |
## 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 | | | 300 | V | | 1 |
| Maximum DC Blocking Voltage | VDC | | | 300 | V | | 1 |
| Maximum RMS Voltage | VRMS | | | 210 | V | | 1 |
| Maximum Average Forward Current | IF(AV) | | | 3 | A | 0.375" (9.5mm) lead length, Ta = 55 °C | 1 |
| Maximum Peak Forward Surge Current | IFSM | | | 150 | A | 8.3ms single half sine wave superimposed on rated load (JEDEC Method) | 1 |
| Maximum Forward Voltage | VF | | 1.1 | 1.7 | V | IF = 3.0 A | 1 |
| Maximum DC Reverse Current | IR | | | 10 | μA | Ta = 25 °C, at rated DC blocking voltage | 1 |
| Maximum DC Reverse Current | IR(H) | | | 50 | μA | Ta = 100 °C, at rated DC blocking voltage | 1 |
| Maximum Reverse Recovery Time | Trr | | | 50 | ns | IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A (Note 1) | 1 |
| Typical Junction Capacitance | CJ | | 50 | | pf | Measured at 1.0 MHz, applied reverse voltage 4.0 VDC (Note 2) | 1 |
| Junction Temperature Range | TJ | -65 | | 150 | °C | | 1 |
| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `HER304`
- 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603103878040592384) (2 pp, sha256 `d5e566dbf7ec9f12`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/her304-datasheet.pdf)