component
SMDJ54A
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Shandong Jingdao Microelectronics ESD And Surge Protection (TVS/ESD), SMC. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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SMDJ54A
Shandong Jingdao Microelectronics · ESD And Surge Protection (TVS/ESD) · SMC
SMDJ54A from Shandong Jingdao Microelectronics, in a SMC. 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 | Cathode | passive | Cathode terminal of the unipolar SMDJ54A transient voltage suppressor, with reverse stand-off voltage VRWM of 54 V per Table 1. |
| 2 | Anode | passive | Anode terminal of the unipolar SMDJ54A transient voltage suppressor, which is the terminal opposite the cathode in the SMC package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | SMC |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation (10x1000us waveform) | PPPM | 3000 | W | 10x1000us waveform, TA=25°C | 1 | ||
| Power Dissipation on infinite heat sink | PM(AV) | 6.5 | W | Infinite heat sink at TA=50°C | 1 | ||
| Peak Forward Surge Current | IFSM | 300 | A | 8.3ms single half sine wave (Note 3) | 1 | ||
| Operating Junction and Storage Temperature Range | Tj, TSTG | -65 | 150 | °C | 1 | ||
| Reverse Stand-off Voltage | VRWM | 54 | V | SMDJ54A (unidirectional) | 2 | ||
| Breakdown Voltage (min) | VBR | 60 | V | @ IT=1 mA | 2 | ||
| Breakdown Voltage (max) | VBR | 66.3 | V | @ IT=1 mA | 2 | ||
| Max. Peak Pulse Current | IPP | 34.4 | A | 10/1000us waveform | 2 | ||
| Max. Clamp Voltage | VC | 87.1 | V | @ IPP=34.4 A | 2 | ||
| Max. Reverse Leakage Current | IR | 2 | uA | @ VR=VRWM | 2 | ||
| Typical Thermal Resistance Junction to Lead | RUJL | 15 | ℃/W | 1 | |||
| Typical Thermal Resistance Junction to Ambient | RUJA | 75 | ℃/W | Copper pad 0.31x0.31 in (Note 2) | 1 |
CAD (KiCad official)
- Symbol:
SMDJ54A - Footprint:
Diode_SMD:D_SMC - 3D model: SMC (KiCad packages3D, STEP)
- 3D model files:
smdj54a-etched.step/smdj54a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smdj54a.step/smdj54a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shandong Jingdao Microelectronics datasheet (4 pp, sha256
a89aa326add6c47a, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).
# SMDJ54A
**Shandong Jingdao Microelectronics** · ESD And Surge Protection (TVS/ESD) · SMC
SMDJ54A from Shandong Jingdao Microelectronics, in a SMC. 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 | Cathode | passive | Cathode terminal of the unipolar SMDJ54A transient voltage suppressor, with reverse stand-off voltage VRWM of 54 V per Table 1. |
| 2 | Anode | passive | Anode terminal of the unipolar SMDJ54A transient voltage suppressor, which is the terminal opposite the cathode in the SMC package. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | SMC |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation (10x1000us waveform) | PPPM | | | 3000 | W | 10x1000us waveform, TA=25°C | 1 |
| Power Dissipation on infinite heat sink | PM(AV) | | | 6.5 | W | Infinite heat sink at TA=50°C | 1 |
| Peak Forward Surge Current | IFSM | | | 300 | A | 8.3ms single half sine wave (Note 3) | 1 |
| Operating Junction and Storage Temperature Range | Tj, TSTG | -65 | | 150 | °C | | 1 |
| Reverse Stand-off Voltage | VRWM | | | 54 | V | SMDJ54A (unidirectional) | 2 |
| Breakdown Voltage (min) | VBR | 60 | | | V | @ IT=1 mA | 2 |
| Breakdown Voltage (max) | VBR | | | 66.3 | V | @ IT=1 mA | 2 |
| Max. Peak Pulse Current | IPP | | | 34.4 | A | 10/1000us waveform | 2 |
| Max. Clamp Voltage | VC | | | 87.1 | V | @ IPP=34.4 A | 2 |
| Max. Reverse Leakage Current | IR | | | 2 | uA | @ VR=VRWM | 2 |
| Typical Thermal Resistance Junction to Lead | RUJL | | 15 | | ℃/W | | 1 |
| Typical Thermal Resistance Junction to Ambient | RUJA | | 75 | | ℃/W | Copper pad 0.31x0.31 in (Note 2) | 1 |
## CAD (KiCad official)
- Symbol: `SMDJ54A`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC (KiCad packages3D, STEP)
- 3D model files: `smdj54a-etched.step` / `smdj54a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smdj54a.step` / `smdj54a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shandong Jingdao Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911995399098369) (4 pp, sha256 `a89aa326add6c47a`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/smdj54a-datasheet.pdf)