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Alternatives to STMicroelectronics HSP051-4M5

STMicroelectronics HSP051-4M5 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 STMicroelectronics HSP051-4M5

HSP051-4M5 compared against its qualified second sources
HSP051-4M5STMicroelectronicsHSP053-4M5STMicroelectronicsPESD3V3X4UHMYLNexperia USA Inc.+1more
FFF CompatibilityFully pin-compatible drop-in with the exact same µQFN-5L pinout configuration (Pin 1: I/O 1, Pin 2: GND, Pin 3: I/O 4, Pin 4: I/O 3, Pin 5: I/O 2).Housed in the exact same µQFN-5L package measuring 1.3 mm x 0.8 mm with 0.5 mm pitch.Maintains the same 5V maximum reverse standoff voltage, 4 channels of unidirectional protection, and exceptionally low line capacitance.Uses a 6-pin DFN1308-6 (SOT8006) package instead of a 5-pin µQFN-5L, requiring a complete footprint redesign.Outer dimensions match (1.3 mm x 0.8 mm), but the land pattern and pin count differ.Operating reverse standoff voltage is restricted to 3.3V (vs. 5.0V for the original), limiting its use to lower-voltage data lines.
AI Summary

HSP051-4M5 by STMicroelectronics: 11.3V Clamp 3A (8/20µs) Ipp Tvs Diode Surface Mount 5-µQFN (1.3x0.8).

The HSP053-4M5 is the manufacturer-recommended direct drop-in replacement for the obsolete HSP051-4M5. It offers identical physical dimensions, the same 5V working voltage, and matching pinouts, making it a seamless transition without board layout modifications.

  • Direct manufacturer-recommended drop-in successor
  • Identical µQFN-5L package and 0.5 mm pin pitch
  • Fully identical pin assignments (no PCB changes)
  • Slightly lower minimum breakdown voltage (5.3V vs. 5.7V) but still fully compatible with 5V signaling lines

The PESD3V3X4UHMYL serves as a close-dimension alternative from Nexperia. While it shares the same 1.3 mm x 0.8 mm body outline, it features a 6-pin layout and a lower 3.3V working voltage, making it suitable only as a redesign alternative for lower voltage lines.

  • Very close physical outer dimensions (1.3 mm x 0.8 mm)
  • Extremely thin profile height of only 0.38 mm
  • Excellent high-speed signal integrity for sub-3.3V differential lines
  • Requires PCB layout redesign due to 6-pin vs. 5-pin configuration
  • Cannot protect 5V signals due to lower 3.3V standoff voltage ceiling
Lifecycle StatusObsoleteActiveActive
Market AvailabilityIn stockIn stockIn stock
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