SESR70

SEMIWARE · ESD Protection Devices · SOT-143

SESR70 from SEMIWARE, in a SOT-143. 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	VN	power_in	Negative supply/ground rail of the steering diode array; transient voltage on the I/O lines is steered to this pin (VRWM 70 V max per line, IPP 24 A at 8/20µs).
2	I/O 1	passive	Protected line 1 (low capacitance, 5 pF typ.) connected to the steering diodes, rated for IEC 61000-4-2 ±15 kV air and ±8 kV contact.
3	I/O 2	passive	Protected line 2 (low capacitance, 5 pF typ.) connected to the steering diodes, rated for IEC 61000-4-4 EFT 40 A (5/50 ns).
4	VP	power_in	Positive supply rail of the steering diode array; transient voltage on the I/O lines is steered to this pin (VRWM 70 V max, VBR 100 V min).

Key specifications

Parameter	Value
Manufacturer	SEMIWARE
Package	SOT-143
Category	Circuit Protection
Pins	4

CAD (KiCad official)

Symbol: SESR70
Footprint: Package_TO_SOT_SMD:SOT-143
3D model: SOT-143 (KiCad packages3D, STEP)
3D model files: sesr70-etched.step / sesr70-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sesr70.step / sesr70.glb are the bare package body.

Provenance

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

Datasheet: SEMIWARE datasheet (3 pp, sha256 e380737500a61db8, retrieved 2026-10-31, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (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

# SESR70

**SEMIWARE** · ESD Protection Devices · SOT-143

SESR70 from SEMIWARE, in a SOT-143. 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 | VN | power_in | Negative supply/ground rail of the steering diode array; transient voltage on the I/O lines is steered to this pin (VRWM 70 V max per line, IPP 24 A at 8/20µs). |
| 2 | I/O 1 | passive | Protected line 1 (low capacitance, 5 pF typ.) connected to the steering diodes, rated for IEC 61000-4-2 ±15 kV air and ±8 kV contact. |
| 3 | I/O 2 | passive | Protected line 2 (low capacitance, 5 pF typ.) connected to the steering diodes, rated for IEC 61000-4-4 EFT 40 A (5/50 ns). |
| 4 | VP | power_in | Positive supply rail of the steering diode array; transient voltage on the I/O lines is steered to this pin (VRWM 70 V max, VBR 100 V min). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SEMIWARE |
| Package | SOT-143 |
| Category | Circuit Protection |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `SESR70`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143 (KiCad packages3D, STEP)
- 3D model files: `sesr70-etched.step` / `sesr70-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sesr70.step` / `sesr70.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SEMIWARE datasheet](docs/sesr70-datasheet.pdf) (3 pp, sha256 `e380737500a61db8`, retrieved 2026-10-31, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/sesr70-datasheet.pdf)