# ASMBJ24CA

**PTTC Polytronics Tech** · ESD And Surge Protection (TVS/ESD) · SMB(DO-214AA)

ASMBJ24CA from PTTC Polytronics Tech, 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 | PTTC Polytronics Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power Dissipation on 10/1000s waveform | PPPM | 600 |  |  | Watt | 10/1000s waveform (Note 1, Fig.1) | 1 |
| Breakdown Voltage | VBR | 26.7 |  | 29.5 | V | @ IT; test current IT = 1 mA | 2 |
| Breakdown voltage tolerance (VBR, no A suffix) |  | -10 |  | 10 | % | Blank VBR tolerance suffix = 10% | 1 |
| Reverse Stand-Off Voltage | VR |  |  | 24 | V |  | 2 |
| Maximum Clamping Voltage | VC |  |  | 38.9 | V | @ IPP = 15.5 A | 2 |
| Maximum Peak Pulse Current | IPP |  |  | 15.5 | A |  | 2 |
| Maximum Reverse Leakage | IR |  |  | 1 | A | @ VR | 2 |
| Steady State Power Dissipation | PM(AV) |  |  | 5 | Watt | TL = 75°C, lead lengths 0.375 in (9.5mm) (Fig.5) | 1 |
| Peak Forward Surge Current | IFSM |  |  | 100 | Amp | 8.3 ms single half sine wave superimposed on rated load (Note 2, Fig.6) | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `ASMBJ24CA`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `asmbj24ca-etched.step` / `asmbj24ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `asmbj24ca.step` / `asmbj24ca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PTTC Polytronics Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588880490207698944) (6 pp, sha256 `b85798a40e48d412`, retrieved 2026-10-16, 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/asmbj24ca-datasheet.pdf)