# P3500SA

**NH** · Semiconductor Discharge Tubes (TSS) · SMB

P3500SA from NH, in a SMB. 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 | 1 | passive | Terminal 1 of the two-terminal thyristor surge suppressor (VDRM 320 V, VS 400 V max for P3500SA), which switches to on-state above VS with IH 150 mA. |
| 2 | 2 | passive | Terminal 2 of the two-terminal thyristor surge suppressor (VDRM 320 V, VS 400 V max for P3500SA), which switches to on-state above VS with IH 150 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NH |
| Package | SMB |
| 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 |
|---|---|---|---|---|---|---|---|
| Repetitive peak off-state voltage | VDRM |  |  | 320 | V | TA=25°C | 3 |
| Switching voltage | VS |  |  | 400 | V | TA=25°C | 3 |
| On-state voltage | VT |  |  | 4 | V | TA=25°C | 3 |
| Leakage current | IDRM |  |  | 5 | uA | TA=25°C | 3 |
| Switching current | IS |  |  | 800 | mA | TA=25°C | 3 |
| On-state current | IT |  |  | 2.2 | A | TA=25°C | 3 |
| Holding current | IH | 150 |  |  | mA | TA=25°C | 3 |
| Peak pulse current, 2x10us | IPP |  |  | 150 | A | 2x10us | 3 |
| Peak pulse current, 8x20us | IPP |  |  | 150 | A | 8x20us | 3 |
| Peak pulse current, 10x160us | IPP |  |  | 90 | A | 10x160us | 3 |
| Peak pulse current, 10x560us | IPP |  |  | 50 | A | 10x560us | 3 |
| Peak pulse current, 10x1000us | IPP |  |  | 45 | A | 10x1000us | 3 |
| Peak pulse voltage | VPP |  |  | 2000 | V | 10x700us | 3 |
| Surge current (ITSM) | ITSM |  |  | 20 | A | 60Hz | 3 |
| di/dt | di/dt |  |  | 500 | A/us |  | 3 |
| Operating junction temperature range | TJ | -40 |  | 150 | ℃ |  | 1 |
| Storage temperature range | TSTG | -40 |  | 150 | ℃ |  | 1 |
| Off-state capacitance | CO |  | 30 |  | pF | TA=25°C | 3 |
| Thermal resistance junction to ambient | RθJA |  | 90 |  | ℃/W | Device mounted on 1 in2 FR-4 board with 2oz. copper, steady-state | 1 |

## CAD (KiCad official)

- Symbol: `P3500SA`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `p3500sa-etched.step` / `p3500sa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `p3500sa.step` / `p3500sa.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NH datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8777615863313534976) (8 pp, sha256 `976a9031a46d1712`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), 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/p3500sa-datasheet.pdf)