component
SMAJ51CA
Public Made by Adomby adom
hongjiacheng ESD And Surge Protection (TVS/ESD), DO-214AC(SMA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
SMAJ51CA
hongjiacheng · ESD And Surge Protection (TVS/ESD) · DO-214AC(SMA)
SMAJ51CA from hongjiacheng, in a DO-214AC(SMA). 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 | hongjiacheng |
| Package | DO-214AC(SMA) |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (bidirectional SMAJ51CA) | VBR | 56.7 | 62.7 | V | @ IT = 1 mA test current | 3 | |
| Maximum clamping voltage (bidirectional SMAJ51CA) | VC | 82.4 | V | @ IPP = 4.9 A | 3 | ||
| Peak pulse current (bidirectional SMAJ51CA) | IPP | 4.9 | A | 10/1000µs waveform; current at which VC is specified | 3 | ||
| Reverse leakage current (bidirectional SMAJ51CA) | IR | 1 | µA | @ VRWM | 3 | ||
| Peak pulse power dissipation | PPPM | 400 | W | 10/1000µs waveform (Fig.1)(Note 1), (Note 2) | 1 | ||
| Peak forward surge current | IFSM | 40 | A | 8.3ms single half sine wave (Note 3) | 1 | ||
| Power dissipation on infinite heat sink | PM(AV) | 1 | W | Infinite heat sink at TL=75°C | 1 | ||
| Operating junction and storage temperature range | TJ, TSTG | -55 | 150 | ℃ | Operating junction and storage temperature range | 1 | |
| Maximum temperature coefficient of VBR | ΔVBR | 0.1 | %×VBR@25℃×ΔT | Typical maximum temperature coefficient | 1 | ||
| Typical thermal resistance junction to lead | RθJ-L | 30 | ℃/W | Typical | 1 | ||
| Typical thermal resistance junction to ambient | RθJ-A | 120 | ℃/W | Typical | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | •Matte tin lead-free Plated •Halogen free and RoHS compliant | 1 |
CAD (KiCad official)
- Symbol:
SMAJ51CA - Footprint:
Diode_SMD:D_SMA - 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files:
smaj51ca-etched.step/smaj51ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smaj51ca.step/smaj51ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (5 pp, sha256
3ff5a7b8618e9ea1, 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).
# SMAJ51CA
**hongjiacheng** · ESD And Surge Protection (TVS/ESD) · DO-214AC(SMA)
SMAJ51CA from hongjiacheng, in a DO-214AC(SMA). 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 | hongjiacheng |
| Package | DO-214AC(SMA) |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage (bidirectional SMAJ51CA) | VBR | 56.7 | | 62.7 | V | @ IT = 1 mA test current | 3 |
| Maximum clamping voltage (bidirectional SMAJ51CA) | VC | | | 82.4 | V | @ IPP = 4.9 A | 3 |
| Peak pulse current (bidirectional SMAJ51CA) | IPP | | | 4.9 | A | 10/1000µs waveform; current at which VC is specified | 3 |
| Reverse leakage current (bidirectional SMAJ51CA) | IR | | | 1 | µA | @ VRWM | 3 |
| Peak pulse power dissipation | PPPM | | | 400 | W | 10/1000µs waveform (Fig.1)(Note 1), (Note 2) | 1 |
| Peak forward surge current | IFSM | | | 40 | A | 8.3ms single half sine wave (Note 3) | 1 |
| Power dissipation on infinite heat sink | PM(AV) | | | 1 | W | Infinite heat sink at TL=75°C | 1 |
| Operating junction and storage temperature range | TJ, TSTG | -55 | | 150 | ℃ | Operating junction and storage temperature range | 1 |
| Maximum temperature coefficient of VBR | ΔVBR | | | 0.1 | %×VBR@25℃×ΔT | Typical maximum temperature coefficient | 1 |
| Typical thermal resistance junction to lead | RθJ-L | | 30 | | ℃/W | Typical | 1 |
| Typical thermal resistance junction to ambient | RθJ-A | | 120 | | ℃/W | Typical | 1 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | •Matte tin lead-free Plated •Halogen free and RoHS compliant | 1 |
## CAD (KiCad official)
- Symbol: `SMAJ51CA`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `smaj51ca-etched.step` / `smaj51ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smaj51ca.step` / `smaj51ca.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [hongjiacheng datasheet](docs/smaj51ca-datasheet.pdf) (5 pp, sha256 `3ff5a7b8618e9ea1`, retrieved 2026-10-21, 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/smaj51ca-datasheet.pdf)