component
CDNBS08-SRDA3.3-4
Public Made by Adomby adom
BOURNS ESD Protection Devices, SO-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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Contents
README
markdownCDNBS08-SRDA3.3-4
BOURNS · ESD Protection Devices · SO-8
CDNBS08-SRDA3.3-4 from BOURNS, in a SO-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 steering diodes to +VREF and GND, 15 pF max capacitance, ESD protection up to ±30 kV. |
| 2 | +VREF | passive | Positive reference rail for the steering diodes; working peak voltage 3.3 V for the CDNBS08-SRDA3.3-4. |
| 3 | +VREF | passive | Positive reference rail for the steering diodes (second +VREF pin); working peak voltage 3.3 V for the CDNBS08-SRDA3.3-4. |
| 4 | I/O 2 | passive | Protected I/O line 2 with steering diodes to +VREF and GND, 15 pF max capacitance, ESD protection up to ±30 kV. |
| 5 | GND | power_in | Ground reference for the TVS diode array; capacitance is measured between pins 8 or 5 and the other pins. |
| 6 | I/O 3 | passive | Protected I/O line 3 with steering diodes to +VREF and GND, 15 pF max capacitance, ESD protection up to ±30 kV. |
| 7 | I/O 4 | passive | Protected I/O line 4 with steering diodes to +VREF and GND, 15 pF max capacitance, ESD protection up to ±30 kV. |
| 8 | GND | power_in | Ground reference for the TVS diode array; capacitance is measured between pins 8 or 5 and the other pins. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | SO-8 |
| Category | Circuit Protection |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Minimum Breakdown Voltage | VBR | 4 | V | @ 1 mA | 1 | ||
| Working Peak Voltage | VWM | 3.3 | V | 1 | |||
| Maximum Clamping Voltage | VC | 8 | V | @ IP | 1 | ||
| Maximum Clamping Voltage @ 8/20 µs | VC | 10.9 | V | @ IPP = 43 A, 8/20 µs | 1 | ||
| Maximum Leakage Current | ID | 125 | µA | @ VWM | 1 | ||
| Maximum Capacitance | CJ(SD) | 15 | pF | Bidirectional @ 0 V, 1 MHz | 1 | ||
| Peak Pulse Power | PPP | 500 | W | tp = 8/20 µs | 1 | ||
| Maximum Forward Voltage | VF | 1.1 | V | @ 10 mA | 1 | ||
| ESD Protection Contact | ESD | 8 | 30 | kV | IEC 61000-4-2 Contact, Min ±8, Max ±30 | 1 | |
| ESD Protection Air | ESD | 15 | 30 | kV | IEC 61000-4-2 Air, Min ±15, Max ±30 | 1 | |
| Operating Temperature | TJ | -55 | 150 | °C | @ TA = 25 °C | 1 | |
| Storage Temperature | TSTG | -55 | 150 | °C | @ TA = 25 °C | 1 |
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 | package with 100 % Sn plating on the lead frame. It weighs approximately 15 mg and has a flammability rating of UL 94V-0. | 2 |
CAD (KiCad official)
- Symbol:
CDNBS08-SRDA3.3-4 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files:
cdnbs08-srda3-3-4-etched.step/cdnbs08-srda3-3-4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cdnbs08-srda3-3-4.step/cdnbs08-srda3-3-4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BOURNS datasheet (5 pp, sha256
ed435f17a31db017, retrieved 2026-10-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).