component
SMDJ8.5A
Public Made by Adomby adom
TWGMC ESD And Surge Protection (TVS/ESD), DO-214AB(SMC). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownSMDJ8.5A
TWGMC · ESD And Surge Protection (TVS/ESD) · DO-214AB(SMC)
SMDJ8.5A from TWGMC, in a DO-214AB(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 SMDJ8.5A unidirectional TVS diode, which is the PINNING table's pin 1; the device is rated for a reverse stand-off voltage of 8.5 V per the characteristics table. |
| 2 | Anode | passive | Anode terminal of the SMDJ8.5A unidirectional TVS diode, which is the PINNING table's pin 2 and the return path for transient clamping current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| Package | DO-214AB(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 | PPPM | 3000 | W | 10x1000 us waveform, TA=25°C (Fig.1) (Note 1, Note 2) | 1 | ||
| Power Dissipation on infinite heat sink | PM(AV) | 6.5 | W | TA=50°C | 1 | ||
| Peak Forward Surge Current | IFSM | 300 | A | 8.3ms single half sine wave (Note 3), unidirectional only | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 3.5 | V | at 100A, unidirectional only | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 15 | ℃/W | 1 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 75 | ℃/W | Mounted on copper pad area 0.31x0.31" (8.0 x 8.0mm) to each terminal (Note 2) | 1 | ||
| Operating Junction and Storage Temperature Range | Tj, TSTG | -65 | 150 | ℃ | 1 | ||
| Reverse Stand-off Voltage (SMDJ8.5A) | VRWM | 8.5 | V | 2 | |||
| Breakdown Voltage (SMDJ8.5A) | VBR | 9.44 | 10.4 | V | IT = 1 mA (test current column for this row) | 2 | |
| Max. Clamp Voltage (SMDJ8.5A) | VC | 14.4 | V | @ IPP = 208.3 A (IPP column, same row) | 2 | ||
| Max. Peak Pulse Current (SMDJ8.5A) | IPP | 208.3 | A | 2 | |||
| Max. Reverse Leakage (SMDJ8.5A) | IR | 20 | uA | @ VR | 2 |
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 Maximum Ratings and Thermal Characteristics (TA=25℃ unless otherwise noted) | 1 |
CAD (KiCad official)
- Symbol:
SMDJ8.5A - Footprint:
Diode_SMD:D_SMC - 3D model: DO-214AB(SMC) (KiCad packages3D, STEP)
- 3D model files:
smdj8-5a-etched.step/smdj8-5a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smdj8-5a.step/smdj8-5a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TWGMC datasheet (4 pp, sha256
07b07d63a3938379, retrieved 2026-10-21, 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).