# ESDSRV05-4

**Yint** · ESD And Surge Protection (TVS/ESD) · SOT-23-6L

ESDSRV05-4 from Yint, in a SOT-23-6L. 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 | I/O1 | passive | ESD-protected I/O line 1 with rail-to-rail steering diodes, 3.5 pF typical capacitance to ground, 5 V reverse stand-off. |
| 2 | GND | power_in | Ground reference connected to the zener diode and lower steering diodes; I/O pins are specified against this pin with 5 V stand-off. |
| 3 | I/O2 | passive | ESD-protected I/O line 2 with rail-to-rail steering diodes, 3.5 pF typical capacitance to ground, 5 V reverse stand-off. |
| 4 | I/O3 | passive | ESD-protected I/O line 3 with rail-to-rail steering diodes, 3.5 pF typical capacitance to ground, 5 V reverse stand-off. |
| 5 | VP | passive | Positive rail connection of the zener and upper steering diodes, used as the reference (VCC/VBUS) in the rail-to-rail protection scheme. |
| 6 | I/O4 | passive | ESD-protected I/O line 4 with rail-to-rail steering diodes, 3.5 pF typical capacitance to ground, 5 V reverse stand-off. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yint |
| Package | SOT-23-6L |
| Category | Circuit Protection |
| Pins | 6 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Stand-off Voltage | VRWM |  |  | 5 | V | Any I/O pin to ground | 2 |
| Reverse Breakdown Voltage | VBR | 6 |  |  | V | It = 1mA, Any I/O pin to ground | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | VRWM =5.0V, T=25℃, Any I/O pin to ground | 2 |
| Clamping Voltage | VC |  | 7.4 | 9 | V | IPP = 1A, tP=8/20μs, Any I/O pin to ground | 2 |
| Clamping Voltage | VC |  | 8.2 | 10 | V | IPP = 5A, tP=8/20μs, Any I/O pin to ground | 2 |
| Clamping Voltage | VC |  | 10.4 | 12 | V | IPP =30A, tP=8/20μs, Any I/O pin to ground | 2 |
| Junction Capacitance | CJ1 |  | 2 | 3 | pF | VR=0V, f = 1MHz, Between I/0 pins | 2 |
| Junction Capacitance | CJ2 |  | 3.5 | 5 | pF | VR=0V, f = 1MHz, Any I/O pin to ground | 2 |
| Peak Current (tp =8/20μs) | PPK |  |  | 450 | W | tp =8/20μs | 2 |
| Peak Current (tp =8/20μs) | IPP |  |  | 30 | A | tp =8/20μs | 2 |
| IEC61000-4-2 (Contact) | VESD | -30 |  | 30 | KV | IEC61000-4-2 contact discharge | 2 |
| IEC61000-4-2 (Air) | VESD | -30 |  | 30 | KV | IEC61000-4-2 air discharge | 2 |
| Lead Soldering Temperature | TL |  |  | 260 | °C | 10 sec | 2 |
| Operating Temperature | TJ | -50 |  | 125 | °C |  | 2 |
| Storage Temperature Range | TSTG | -50 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `ESDSRV05-4`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6L (KiCad packages3D, STEP)
- 3D model files: `esdsrv05-4-etched.step` / `esdsrv05-4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esdsrv05-4.step` / `esdsrv05-4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yint datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588904637877932032) (4 pp, sha256 `70c72b3aed2c74e4`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/esdsrv05-4-datasheet.pdf)