component
SR05-4A 5.5A
Public Made by Adomby adom
DOWO ESD And Surge Protection (TVS/ESD), SOT-23-6L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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| README.md | 17d ago |
| sr05-4a-5-5a-etched.glb | 17d ago |
| sr05-4a-5-5a-etched.step | 17d ago |
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SR05-4A 5.5A
DOWO · ESD And Surge Protection (TVS/ESD) · SOT-23-6L
SR05-4A 5.5A from DOWO, 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 | IO1 | bidirectional | Connect to the I/O line to be ESD/transient protected; the device has a 5 V peak reverse working voltage (VRWM) and is rated for ±20 kV IEC 61000-4-2 contact and air discharge. |
| 2 | GND | power_in | Connect to ground; this is the common reference for the protection clamps on the I/O pins. |
| 3 | IO2 | bidirectional | Connect to the I/O line to be ESD/transient protected; the device has a 5 V peak reverse working voltage (VRWM) and is rated for ±20 kV IEC 61000-4-2 contact and air discharge. |
| 4 | IO3 | bidirectional | Connect to the I/O line to be ESD/transient protected; the device has a 5 V peak reverse working voltage (VRWM) and is rated for ±20 kV IEC 61000-4-2 contact and air discharge. |
| 5 | Vcc | power_in | Connect to the Vcc supply rail of the protected circuit; the datasheet gives no separate voltage limit for this pin beyond the 5 V working voltage of the device. |
| 6 | IO4 | bidirectional | Connect to the I/O line to be ESD/transient protected; the device has a 5 V peak reverse working voltage (VRWM) and is rated for ±20 kV IEC 61000-4-2 contact and air discharge. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature | TOP | -40 | 85 | ℃ | 2 | ||
| Storage temperature | TSTG | -55 | 150 | ℃ | 2 | ||
| Peak pulse current | IPP | 5.5 | A | tp=8/20us @25℃ | 2 | ||
| Peak pulse power | Ppk | 80 | W | tp=8/20us @25℃ | 2 | ||
| ESD (IEC61000-4-2 air discharge) | VESD | 20 | kV | @25℃ | 2 | ||
| ESD (IEC61000-4-2 contact discharge) | VESD | 20 | kV | @25℃ | 2 | ||
| Junction temperature | TJ | 125 | ℃ | 2 | |||
| Lead temperature | TL | 260 | ℃ | 2 | |||
| Clamping Voltage | VC | 10 | V | IPP=1A; tp=8/20us | 3 | ||
| Clamping Voltage | VC | 16 | V | IPP=5.5A; tp=8/20us | 3 | ||
| Junction Capacitance (I/O to GND) | CJ | 0.8 | pF | I/O to GND; VR=0V; f=1MHz | 3 | ||
| Junction Capacitance (between I/O) | CJ | 0.4 | pF | Between I/O; VR=0V; f=1MHz | 3 | ||
| Reverse Stand-off Voltage | VRWM | 5 | V | 3 | |||
| Reverse Breakdown Voltage | VBR | 6 | V | IT=1mA | 3 | ||
| Reverse Leakage Current | IR | 1 | uA | VRWM=5V | 3 |
CAD (KiCad official)
- Symbol:
SR05-4A 5.5A - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6L (KiCad packages3D, STEP)
- 3D model files:
sr05-4a-5-5a-etched.step/sr05-4a-5-5a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sr05-4a-5-5a.step/sr05-4a-5-5a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (6 pp, sha256
6e80774cf1a322ca, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).