# BEP4200SB

**BORN** · Thyristor Surge Suppressors (TSS) · SMB

BEP4200SB from BORN, 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 | T1 | passive | Terminal 1 of the bidirectional thyristor surge suppressor, rated for 4000 V peak pulse voltage (10/700us) and 80 A peak pulse current (10/1000us), interchangeable with terminal 2. |
| 2 | T2 | passive | Terminal 2 of the bidirectional thyristor surge suppressor, rated for 4000 V peak pulse voltage (10/700us) and 80 A peak pulse current (10/1000us), interchangeable with terminal 1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| 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 |
|---|---|---|---|---|---|---|---|
| Holding current | IH | 120 |  |  | mA |  | 2 |
| VS (switching voltage column) | VS |  |  | 550 | V | 100KV/S | 2 |
| ISLMT (column) | ISLMT |  |  | 800 | mA |  | 2 |
| On-state voltage (VT column) | VT |  |  | 4 | V | @IT, IT = 2.2 A | 2 |
| Off-state current (ID column) | ID |  |  | 5 | uA | @VD, VD = 400 V | 2 |
| Peak Pulse Voltage | VPP |  |  | 4000 | V | 10/700us | 2 |
| Peak Pulse Current | IPP |  |  | 80 | A | 10/1000us | 2 |
| Peak Pulse Current | IPK |  |  | 250 | A | 8/20us | 2 |
| Peak One-cycle Surge Current | ITSM |  |  | 25 | A | 60HZ | 2 |
| Rate of Rise of Current | di/dt |  |  | 500 | A/us |  | 2 |
| Operating Temperature Range | TJ | -40 |  | 150 | °C |  | 2 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 2 |
| Reflow peak temperature limit |  |  |  | 260 | °C | Reflow, do not exceed 260°C | 4 |
| Off-state capacitance | CO |  | 36 |  | pF | 1MHZ, 2VDC | 2 |
| Typical Thermal Resistance Junction to Lead | RθJL |  | 20 |  | °C/W |  | 2 |
| Typical Thermal Resistance Junction to Ambient | RθJA |  | 100 |  | °C/W |  | 2 |

## 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: `BEP4200SB`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `bep4200sb-etched.step` / `bep4200sb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bep4200sb.step` / `bep4200sb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BORN datasheet](docs/bep4200sb-datasheet.pdf) (5 pp, sha256 `b74f8cd79d8565d1`, retrieved 2026-10-21, 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/bep4200sb-datasheet.pdf)