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Alternatives to Bourns Inc. TBU-CA085-300-WH

Bourns Inc. TBU-CA085-300-WH and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for Bourns Inc. TBU-CA085-300-WH

TBU-CA085-300-WH compared against its qualified second sources
TBU-CA085-300-WHBourns Inc.TBU-CA065-300-WHBourns Inc.TBU-CA085-500-WHBourns Inc.+1more
FFF CompatibilityIdentical 3-pin DFN package footprint (6.50 mm x 4.00 mm) with matching terminal assignment.Identical package dimensions, leadless DFN construction, and surface-mount orientation.Lower peak impulse withstand voltage rating (650 V vs 850 V) and lower continuous RMS voltage rating (300 V vs 425 V).Identical 3-pin DFN package footprint (6.50 mm x 4.00 mm) with matching terminal assignment.Identical package dimensions, leadless DFN construction, and surface-mount orientation.Higher trigger current threshold (500 mA min vs 300 mA min) lets higher surge current pass before blocking.
AI Summary

TBU-CA085-300-WH by Bourns Inc.: Overvoltage/Surge Protection IC 850V Internal Switch 3-SMD (6.5x4).

The TBU-CA065-300-WH is a direct footprint drop-in sibling that maintains the exact same 300 mA trigger current and package layout as the target part. However, its peak impulse voltage withstand capability is reduced from 850 V to 650 V (and continuous AC RMS rating from 425 V to 300 V). It serves as a drop-in alternative for applications where maximum transient surges do not exceed 650 V.

  • Direct footprint drop-in replacement (6.5 mm x 4.0 mm DFN package)
  • Identical 300 mA minimum trigger current rating
  • Identical 3-pin pinout structure (Line In/Out on pins 1 and 3, Pad 2 NU)
  • Lower peak impulse voltage withstand (Vimp): 650 V vs 850 V
  • Lower continuous AC RMS voltage rating (Vrms): 300 V vs 425 V

The TBU-CA085-500-WH is a direct footprint drop-in sibling in the same series with an identical 850 V impulse withstand rating. It differs only in its trigger current rating (500 mA minimum vs 300 mA minimum), which allows higher line current to flow before triggering into its high-impedance blocking state. It is an ideal pin-for-pin replacement if the application can tolerate a higher trip threshold or requires higher current throughput.

  • Direct footprint drop-in replacement (6.5 mm x 4.0 mm DFN package)
  • Same 850 V impulse withstand voltage (Vimp) rating
  • Identical 3-pin pinout structure (Line In/Out on pins 1 and 3, Pad 2 NU)
  • Higher trigger current threshold: 500 mA min (750 mA typ) vs 300 mA min (450 mA typ)
  • Lower series device resistance: 10.7 to 12.2 ohms vs 11.3 to 13.0 ohms
Lifecycle StatusActiveActiveActive
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