component
SMBJ45A
Public Made by Adomby adom
hongjiacheng ESD And Surge Protection (TVS/ESD), SMB(DO-214AA). Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
SMBJ45A
hongjiacheng · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ45A from hongjiacheng, in a SMB(DO-214AA). 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 | SMB(DO-214AA) |
| 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 (min) | VBR | 50 | V | IT(mA) = 1 | 3 | ||
| Breakdown Voltage (max) | VBR | 55.3 | V | IT(mA) = 1 | 3 | ||
| Maximum Clamping Voltage | VC | 72.7 | V | IPP = 8.25 A | 3 | ||
| Reverse Leakage Current | IR | 5 | µA | @VRWM | 3 | ||
| VBR tolerance (suffix A) | VBR | -5 | 5 | % | Suffix 'A' denotes 5% tolerance device | 3 | |
| Peak Pulse Power Dissipation | PPPM | 600 | W | 10/1000µs waveform (Fig.1)(Note 1), (Note 2) | 1 | ||
| Power Dissipation on Infinite Heat Sink | PM(AV) | 5 | W | TL=75° C | 1 | ||
| Peak Forward Surge Current | IFSM | 100 | A | 8.3ms Single Half Sine Wave (Note 3) | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 3.5 | V | at 25A for Unidirectional Only; VBR<200V (Note 4) | 1 | ||
| Operating junction and Storage Temperature Range | TJ, TSTG | -55 | 150 | ℃ | 1 | ||
| Typical thermal resistance junction to lead | RθJ-L | 20 | ℃/W | Typical | 1 | ||
| Typical thermal resistance junction to ambient | RθJ-A | 100 | ℃/W | Typical | 1 | ||
| Typical maximum temperature coefficient of VBR | ΔVBR | 0.1 | % | ΔVBR = 0.1% ×VBR@25℃ ×ΔT | 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:
SMBJ45A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files:
smbj45a-etched.step/smbj45a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smbj45a.step/smbj45a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (5 pp, sha256
7ec82639a36ea7d4, 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).
# SMBJ45A
**hongjiacheng** · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)
SMBJ45A from hongjiacheng, in a SMB(DO-214AA). 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 | SMB(DO-214AA) |
| 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 (min) | VBR | 50 | | | V | IT(mA) = 1 | 3 |
| Breakdown Voltage (max) | VBR | | | 55.3 | V | IT(mA) = 1 | 3 |
| Maximum Clamping Voltage | VC | | | 72.7 | V | IPP = 8.25 A | 3 |
| Reverse Leakage Current | IR | | | 5 | µA | @VRWM | 3 |
| VBR tolerance (suffix A) | VBR | -5 | | 5 | % | Suffix 'A' denotes 5% tolerance device | 3 |
| Peak Pulse Power Dissipation | PPPM | | | 600 | W | 10/1000µs waveform (Fig.1)(Note 1), (Note 2) | 1 |
| Power Dissipation on Infinite Heat Sink | PM(AV) | | | 5 | W | TL=75° C | 1 |
| Peak Forward Surge Current | IFSM | | | 100 | A | 8.3ms Single Half Sine Wave (Note 3) | 1 |
| Maximum Instantaneous Forward Voltage | VF | | | 3.5 | V | at 25A for Unidirectional Only; VBR<200V (Note 4) | 1 |
| Operating junction and Storage Temperature Range | TJ, TSTG | -55 | | 150 | ℃ | | 1 |
| Typical thermal resistance junction to lead | RθJ-L | | 20 | | ℃/W | Typical | 1 |
| Typical thermal resistance junction to ambient | RθJ-A | | 100 | | ℃/W | Typical | 1 |
| Typical maximum temperature coefficient of VBR | ΔVBR | | | 0.1 | % | ΔVBR = 0.1% ×VBR@25℃ ×ΔT | 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: `SMBJ45A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `smbj45a-etched.step` / `smbj45a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj45a.step` / `smbj45a.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [hongjiacheng datasheet](docs/smbj45a-datasheet.pdf) (5 pp, sha256 `7ec82639a36ea7d4`, 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/smbj45a-datasheet.pdf)