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CDNBS08-SRDA05-4
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BOURNS ESD Protection Devices, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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CDNBS08-SRDA05-4
BOURNS · ESD Protection Devices · SOIC-8
CDNBS08-SRDA05-4 from BOURNS, in a SOIC-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 | bidirectional | Protected I/O line 1 of the SRDA05-4 steering/TVS array, rated for a working peak voltage VWM of 5.0 V with a minimum breakdown voltage VBR of 6.0 V at 1 mA. |
| 2 | +VREF | power_in | Reference pin labeled +VREF in the pin function table; the datasheet gives no further function or limits for it. |
| 3 | +VREF | power_in | Reference pin labeled +VREF in the pin function table; the datasheet gives no further function or limits for it. |
| 4 | I/O 2 | bidirectional | Protected I/O line 2 of the SRDA05-4 steering/TVS array, rated for a working peak voltage VWM of 5.0 V with a maximum capacitance of 15 pF at 0 V, 1 MHz. |
| 5 | GND | power_in | Ground pin; the datasheet's electrical characteristics measure surge and clamping between pins 8 or 5 and the I/O pins 1, 2, 3, 4, 6 and 7. |
| 6 | I/O 3 | bidirectional | Protected I/O line 3 of the SRDA05-4 steering/TVS array, rated for a working peak voltage VWM of 5.0 V with a maximum leakage current of 1 µA at VWM. |
| 7 | I/O 4 | bidirectional | Protected I/O line 4 of the SRDA05-4 steering/TVS array, rated for ESD protection up to ±30 kV per IEC 61000-4-2 (contact, max). |
| 8 | GND | power_in | Ground pin; the datasheet's electrical characteristics measure surge and clamping between pins 8 or 5 and the I/O pins 1, 2, 3, 4, 6 and 7. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | SOIC-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 | 6 | V | @ 1 mA | 1 | ||
| Maximum Clamping Voltage | VC @ IP | 9.8 | V | See Pulse Waveform (note 1) | 1 | ||
| Maximum Clamping Voltage (8/20 µs) | VC @ IPP | 13.5 | V | 8/20 µs, @ 42 A | 1 | ||
| Maximum Leakage Current | ID | 20 | µA | @ VWM | 1 | ||
| Maximum Capacitance Bidirectional | CJ(SD) | 15 | pF | @ 0 V, 1 MHz | 1 | ||
| Maximum Forward Voltage | VF | 1.1 | V | @ 10 mA | 1 | ||
| Peak Pulse Power | PPP | 500 | W | tp = 8/20 µs | 1 | ||
| Working Peak Voltage | VWM | 5 | V | 1 | |||
| ESD Protection per IEC 61000-4-2 Contact - Min. | ESD | -8 | 8 | kV | Contact discharge, Min. level | 1 | |
| ESD Protection per IEC 61000-4-2 Contact - Max. | ESD | -30 | 30 | kV | Contact discharge, Max. level | 1 | |
| ESD Protection per IEC 61000-4-2 Air - Min. | ESD | -15 | 15 | kV | Air discharge, Min. level | 1 | |
| ESD Protection per IEC 61000-4-2 Air - Max. | ESD | -30 | 30 | kV | Air discharge, Max. level | 1 | |
| Operating Temperature | TJ | -55 | 150 | °C | 1 | ||
| Storage Temperature | TSTG | -55 | 150 | °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-SRDA05-4 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
cdnbs08-srda05-4-etched.step/cdnbs08-srda05-4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cdnbs08-srda05-4.step/cdnbs08-srda05-4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BOURNS datasheet (5 pp, sha256
ed435f17a31db017, retrieved 2026-10-29, 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).
# CDNBS08-SRDA05-4
**BOURNS** · ESD Protection Devices · SOIC-8
CDNBS08-SRDA05-4 from BOURNS, in a SOIC-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 | bidirectional | Protected I/O line 1 of the SRDA05-4 steering/TVS array, rated for a working peak voltage VWM of 5.0 V with a minimum breakdown voltage VBR of 6.0 V at 1 mA. |
| 2 | +VREF | power_in | Reference pin labeled +VREF in the pin function table; the datasheet gives no further function or limits for it. |
| 3 | +VREF | power_in | Reference pin labeled +VREF in the pin function table; the datasheet gives no further function or limits for it. |
| 4 | I/O 2 | bidirectional | Protected I/O line 2 of the SRDA05-4 steering/TVS array, rated for a working peak voltage VWM of 5.0 V with a maximum capacitance of 15 pF at 0 V, 1 MHz. |
| 5 | GND | power_in | Ground pin; the datasheet's electrical characteristics measure surge and clamping between pins 8 or 5 and the I/O pins 1, 2, 3, 4, 6 and 7. |
| 6 | I/O 3 | bidirectional | Protected I/O line 3 of the SRDA05-4 steering/TVS array, rated for a working peak voltage VWM of 5.0 V with a maximum leakage current of 1 µA at VWM. |
| 7 | I/O 4 | bidirectional | Protected I/O line 4 of the SRDA05-4 steering/TVS array, rated for ESD protection up to ±30 kV per IEC 61000-4-2 (contact, max). |
| 8 | GND | power_in | Ground pin; the datasheet's electrical characteristics measure surge and clamping between pins 8 or 5 and the I/O pins 1, 2, 3, 4, 6 and 7. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| Package | SOIC-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 | 6 | | | V | @ 1 mA | 1 |
| Maximum Clamping Voltage | VC @ IP | | | 9.8 | V | See Pulse Waveform (note 1) | 1 |
| Maximum Clamping Voltage (8/20 µs) | VC @ IPP | | | 13.5 | V | 8/20 µs, @ 42 A | 1 |
| Maximum Leakage Current | ID | | | 20 | µA | @ VWM | 1 |
| Maximum Capacitance Bidirectional | CJ(SD) | | | 15 | pF | @ 0 V, 1 MHz | 1 |
| Maximum Forward Voltage | VF | | | 1.1 | V | @ 10 mA | 1 |
| Peak Pulse Power | PPP | | | 500 | W | tp = 8/20 µs | 1 |
| Working Peak Voltage | VWM | | | 5 | V | | 1 |
| ESD Protection per IEC 61000-4-2 Contact - Min. | ESD | -8 | | 8 | kV | Contact discharge, Min. level | 1 |
| ESD Protection per IEC 61000-4-2 Contact - Max. | ESD | -30 | | 30 | kV | Contact discharge, Max. level | 1 |
| ESD Protection per IEC 61000-4-2 Air - Min. | ESD | -15 | | 15 | kV | Air discharge, Min. level | 1 |
| ESD Protection per IEC 61000-4-2 Air - Max. | ESD | -30 | | 30 | kV | Air discharge, Max. level | 1 |
| Operating Temperature | TJ | -55 | | 150 | °C | | 1 |
| Storage Temperature | TSTG | -55 | | 150 | °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-SRDA05-4`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cdnbs08-srda05-4-etched.step` / `cdnbs08-srda05-4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cdnbs08-srda05-4.step` / `cdnbs08-srda05-4.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BOURNS datasheet](docs/cdnbs08-srda05-4-datasheet.pdf) (5 pp, sha256 `ed435f17a31db017`, retrieved 2026-10-29, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/cdnbs08-srda05-4-datasheet.pdf)