# SMCJ150A

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

SMCJ150A 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 | Cathode | passive | Cathode terminal of the unidirectional TVS (SMCJ150A: VR 150 V, VBR 167-185 V at 1 mA, VC 243 V at IPP 6.2 A), marked by the band; connect to the protected positive line. |
| 2 | Anode | passive | Anode terminal of the unidirectional TVS (SMCJ150A), connected to ground or the return line; peak pulse power rating is 1500 W (10/1000us). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Taisko |
| Package | SMC(DO-214AB) |
| Category | TVS/Fuse/Board Level 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-off Voltage | VR |  | 150 |  | V |  | 4 |
| Breakdown Voltage | VBR | 167 |  | 185 | V | @ IT = 1 mA | 4 |
| Maximum Clamping Voltage | VC |  |  | 243 | V | @ IPP = 6.2 A | 4 |
| Maximum Peak Pulse Current | IPP |  |  | 6.2 | A |  | 4 |
| Maximum Reverse Leakage | IR |  |  | 1 | μA | @ VR | 4 |
| Test Current | IT |  | 1 |  | mA |  | 4 |
| Maximum Instantaneous Forward Voltage | VFM |  |  | 3.5 | V | at 100A, unidirectional only, VBR ≤200V (Note5) | 3 |
| Peak Pulse Power Dissipation | PPPM |  |  | 1500 | W | Note1, Note2 (10/1000us waveform) | 3 |
| Steady State Power Dissipation | PD |  |  | 6.5 | W | Note3 | 3 |
| Peak Forward Surge Current | IFSM |  |  | 200 | A | Note4, 8.3ms single half sine wave | 3 |
| Operating Temperature Range | TJ | -55 |  | 150 | ℃ |  | 3 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 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: `SMCJ150A`
- Footprint: `Diode_SMD:D_SMC`
- 3D model: SMC(DO-214AB) (KiCad packages3D, STEP)
- 3D model files: `smcj150a-etched.step` / `smcj150a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smcj150a.step` / `smcj150a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Taisko datasheet](docs/smcj150a-datasheet.pdf) (8 pp, sha256 `bb76d9c11f3fc36a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/smcj150a-datasheet.pdf)