# 30KPA33A

**Littelfuse** · TVS · P600

30KPA33A from Littelfuse, in a P600. 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 lead of the unidirectional TVS, marked by the color band, with 33 V reverse standoff voltage and 36.90 V to 40.59 V breakdown at 50 mA for the 30KPA33A-HRA. |
| 2 | Anode | passive | Anode lead of the unidirectional TVS, with a maximum clamping voltage of 58.5 V at 517.9 A peak pulse current for the 30KPA33A-HRA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | P600 |
| 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 | VBR | 36.9 |  | 40.59 | V | @ IT = 50 mA, TA=25°C | 2 |
| Reverse Stand-off Voltage | VR |  | 33 |  | V | TA=25°C | 2 |
| Maximum Peak Pulse Current | Ipp |  |  | 517.9 | A | TA=25°C | 2 |
| Maximum Reverse Leakage | IR |  |  | 5000 | µA | @ VR, TA=25°C | 2 |
| Maximum Clamping Voltage | VC |  |  | 58.5 | V | @ IPP, TA=25°C | 2 |
| Test Current | IT |  | 50 |  | mA | TA=25°C | 2 |
| Peak Pulse Power Dissipation | PPPM |  |  | 30 | kW | 10/1000μs test waveform (Fig.2), TA=25°C | 1 |
| Steady State Power Dissipation | PD |  |  | 8 | W | Infinite heat sink at TL=75ºC | 1 |
| Peak Forward Surge Current | IFSM |  |  | 400 | A | 8.3ms single half sine wave, unidirectional only | 1 |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 175 | °C |  | 1 |
| Typical Thermal Resistance Junction to Lead | RƟJL |  | 8 |  | °C/W |  | 1 |
| Typical Thermal Resistance Junction to Ambient | RƟJA |  | 40 |  | °C/W |  | 1 |
| Breakdown Voltage Tolerance | VBR | -5 |  | 5 | % | Type code A, uni-directional | 5 |
| Breakdown Voltage Temperature Coefficient | αT |  | 0.1 |  | % | VBR @ TJ = VBR@25°C x (1+αT x (TJ - 25)) | 1 |

## 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-free matte tin plated package | 1 |

## CAD (KiCad official)

- Symbol: `30KPA33A`
- Footprint: `Diode_THT:D_P600_R-6_P20.00mm_Horizontal`
- 3D model: P600 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Littelfuse datasheet](docs/30kpa33a-datasheet.pdf) (7 pp, sha256 `a8bff9b426134a12`, retrieved 2026-11-02, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-opus-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/30kpa33a-datasheet.pdf)