# SMCJ8.5CA

**Taisko** · ESD And Surge Protection (TVS/ESD) · SMC(DO-214AB)

SMCJ8.5CA from Taisko, in a SMC(DO-214AB). 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 | Terminal 1 | passive | Bidirectional TVS terminal (no polarity) with 8.5 V reverse standoff voltage, 9.44-10.4 V breakdown at 1 mA, and 14.4 V maximum clamping at 104.2 A peak pulse current. |
| 2 | Terminal 2 | passive | Bidirectional TVS terminal (no polarity) with 8.5 V reverse standoff voltage, 9.44-10.4 V breakdown at 1 mA, and 14.4 V maximum clamping at 104.2 A peak pulse current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Taisko |
| Package | SMC(DO-214AB) |
| 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 | 9.44 |  | 10.4 | V | @ IT = 1 mA (test current, same row) | 3 |
| Maximum Clamping Voltage | VC |  |  | 14.4 | V | @ IPP = 104.2 A (same row) | 3 |
| Maximum Peak Pulse Current | IPP |  |  | 104.2 | A |  | 3 |
| Maximum Reverse Leakage Current | IR |  |  | 20 | μA | @ VR = 8.5 V (same row) | 3 |
| Peak Pulse Power Dissipation | PPPM |  |  | 1500 | W | Note1, Note2 (as printed) | 3 |
| Steady State Power Dissipation | PD |  |  | 6.5 | W | Note3 (as printed) | 3 |
| Peak Forward Surge Current | IFSM |  |  | 200 | A | Note4 (as printed) | 3 |
| Operating Temperature Range | TJ | -55 |  | 150 | ℃ |  | 3 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 3 |
| Reverse Stand-off Voltage | VR |  | 8.5 |  | V | Printed as single value for SMCJ8.5CA; no min/max given | 3 |
| Typical Thermal Resistance Junction to Lead | RθJL |  | 15 |  | ℃/W |  | 3 |
| Typical Thermal Resistance Junction to Ambient | RθJA |  | 75 |  | ℃/W |  | 3 |

## 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 | Lead Finish: Matte Tin Case Material: Epoxy Molding Compound. | 1 |

## CAD (KiCad official)

- Symbol: `SMCJ8.5CA`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smcj8-5ca-etched.step` / `smcj8-5ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smcj8-5ca.step` / `smcj8-5ca.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Taisko datasheet](docs/smcj8-5ca-datasheet.pdf) (8 pp, sha256 `bb76d9c11f3fc36a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/smcj8-5ca-datasheet.pdf)