# ATV04A240JB-HF

**Comchip** · TVS · SMA(DO-214AC)

ATV04A240JB-HF from Comchip, in a SMA(DO-214AC). 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 | A1 | passive | Bidirectional TVS terminal (ATV04A240JB, VRWM 24.0V, VBR 26.7-29.5V at 1mA, VC 38.9V at IPP 10.28A); no polarity, interchangeable with the other terminal. |
| 2 | A2 | passive | Bidirectional TVS terminal (ATV04A240JB, VRWM 24.0V, VBR 26.7-29.5V at 1mA, VC 38.9V at IPP 10.28A); no cathode band on bipolar parts, so it is interchangeable with the other terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Comchip |
| Package | SMA(DO-214AC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage | VBR | 26.7 |  | 29.5 | V | @ IT = 1 mA | 3 |
| Test current | IT |  | 1 |  | mA | VBR test | 3 |
| Working peak reverse voltage | VRWM |  | 24 |  | V |  | 3 |
| Maximum reverse leakage current | IR |  |  | 1 | uA | @VRWM | 3 |
| Maximum surge current | IPP |  |  | 10.28 | A | 10/1000us waveform | 3 |
| Maximum clamping voltage | VC |  |  | 38.9 | V | @IPP | 3 |
| Breakdown voltage tolerance |  | -5 |  | 5 | % | Suffix J denotes 5% tolerance devices | 4 |
| Peak power dissipation | PPP |  |  | 400 | W | 10/1000us waveform (Note 1) | 1 |
| Steady state power dissipation | PD |  |  | 1 | W | TL=75°C | 1 |
| Peak forward surge current | IFSM |  |  | 40 | A | 8.3mS single half sine-wave, unidirectional only (Note 2) | 1 |
| Maximum instantaneous forward voltage | VF |  |  | 3.5 | V | at 25.0A, unidirectional only, VBR<200V (Note 3) | 1 |
| Operating junction and storage temperature | TJ, TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `ATV04A240JB-HF`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Comchip datasheet](docs/atv04a240jb-hf-datasheet.pdf) (6 pp, sha256 `1d148ea57fb81897`, retrieved 2026-10-31, 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/atv04a240jb-hf-datasheet.pdf)