component
SRDA3.3-4DR2G
Public Made by Adomby adom
TECH PUBLIC ESD And Surge Protection (TVS/ESD), SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSRDA3.3-4DR2G
TECH PUBLIC · ESD And Surge Protection (TVS/ESD) · SOP-8
SRDA3.3-4DR2G from TECH PUBLIC, in a SOP-8. 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/O 1 | passive | Protected I/O line 1, with 7pF max (5pF typ) junction capacitance to ground and 3pF typ between I/O pins. |
| 2 | REF 1 | power_in | Positive reference (steering-diode top rail, tied to the TVS diode), internally common with pin 3. |
| 3 | REF 1 | power_in | Positive reference (steering-diode top rail, tied to the TVS diode), internally common with pin 2. |
| 4 | I/O 2 | passive | Protected I/O line 2, with 7pF max (5pF typ) junction capacitance to ground and 3pF typ between I/O pins. |
| 5 | REF 2 | power_in | Ground reference (bottom rail of the steering diodes), internally common with pin 8. |
| 6 | I/O 3 | passive | Protected I/O line 3, with 7pF max (5pF typ) junction capacitance to ground and 3pF typ between I/O pins. |
| 7 | I/O 4 | passive | Protected I/O line 4, with 7pF max (5pF typ) junction capacitance to ground and 3pF typ between I/O pins. |
| 8 | REF 2 | power_in | Ground reference (bottom rail of the steering diodes), internally common with pin 5. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOP-8 |
| Category | Circuit Protection |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
SRDA3.3-4DR2G - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
srda3-3-4dr2g-etched.step/srda3-3-4dr2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);srda3-3-4dr2g.step/srda3-3-4dr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TECH PUBLIC datasheet (4 pp, sha256
0d72d7db9c53591b, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-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).