# HER102

**HL(Haolin Elec)** · Diodes - General Purpose · DO-41

HER102 from HL(Haolin Elec), 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 | K | passive | Cathode, marked by the cathode band on the DO-41 body; HER102 is rated for 100V VRRM, 70V VRMS and 100V DC blocking voltage. |
| 2 | A | passive | Anode terminal of the DO-41 axial diode; HER102 is rated for 1.0A average forward rectified current at TA=55 C and 30A peak surge current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HL(Haolin Elec) |
| 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 bridge input voltage | VRMS |  |  | 70 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 100 | V |  | 1 |
| Maximum average forward rectified output current | IF(AV) |  |  | 1 | A | TA=55 C | 1 |
| Peak forward surge current | IFSM |  |  | 30 | A | single sine-wave superimposed on rated load (JEDEC Method) | 1 |
| Maximum reverse recovery time | Trr |  |  | 50 | nS | TJ=25 C | 1 |
| Maximum instantaneous forward voltage drop per leg | VF |  |  | 1 | V | at 1.0A | 1 |
| Maximum DC reverse current at rated DC blocking voltage | IR |  |  | 5 |  | TA=25 C | 1 |
| Maximum DC reverse current at rated DC blocking voltage | IR |  |  | 50 |  | TA=125 C | 1 |
| Typical thermal resistance per element | ReJA |  | 50 |  | /W |  | 1 |
| Typical junction capacitance per element | Cj |  | 20 |  | pF |  | 1 |
| Operating junction and storage temperature range | TJ, TSTG | -55 |  | 150 | C |  | 1 |

## CAD (KiCad official)

- Symbol: `HER102`
- 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:** [HL(Haolin Elec) datasheet](docs/her102-datasheet.pdf) (2 pp, sha256 `b7ec810e888f2242`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/her102-datasheet.pdf)