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CDNBS08-SRDA3.3-4

Public Made by Adom

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BOURNS ESD Protection Devices, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CDNBS08-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cdnbs08-srda3-3-4.step / cdnbs08-srda3-3-4.glb are 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, primary claude-sonnet-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