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Littelfuse SM15KPA-HRA & SM30KPA-HRA High Reliability Diodes

Littelfuse SM15KPA-HRA and SM30KPA-HRA High Reliability Transient Voltage Suppressor (TVS) Diodes protect I/O interfaces, VCC bus, and other vulnerable circuits in avionics, aviation, and electric vertical take-off and landing (eVTOL) aircraft applications. These diodes are specifically designed for use in sensitive electronic equipment to protect against voltage transients caused by lightning and other transient voltage events. Both series safeguard data lines from electrical fast transients (EFT) per IEC 61000-4-4 and electrostatic discharge (ESD) per IEC 61000-4-2, up to 30kV (air and contact). Littelfuse SM15KPA-HRA and SM30KPA-HRA TVS diodes offer a fast response time of <1ps and are housed in a low-profile, surface-mount package that optimizes board space.

Features

  • Low-profile package
  • For surface-mounted applications to optimize board space
  • Low incremental surge resistance
  • Excellent clamping capability
  • Typical failure mode is short from over-specified voltage or current
  • Meets moisture sensitivity level (MSL) 1, per J-STD-020, LF maximum peak of +245°C
  • Matte tin lead-free plated
  • Halogen free and RoHS compliant
  • Lead free E3 means 2nd-level interconnect is lead free and terminal finish material is tin (Sn) (IPC/JEDEC J-STD609A.01)

Applications

  • Avionics
  • Aviation
  • eVTOL

Specifications

  • Peak pulse capability at 10/1000μs waveform
    • SM15KPA-HRA: 15kW, repetition rate (duty cycles): 0.01%
    • SM30KPA-HRA: 30kW, repetition rate (duty cycles): 0.01%
  • Whisker test is conducted based on JEDEC JESD201A per its table 4a and 4c
  • ESD protection of data lines in accordance with IEC 61000-4-2, 30kV (air), 30kV (contact)
  • EFT protection of data lines in accordance with IEC 61000- 4-4
  • Typical IR
    • SM15KPA-HRA: <2μA when VBR minimum >33.5V
    • SM30KPA-HRA:<2μA when VBR minimum >66.7V
  • <1ps typical response time from 0V to VBR minimum
  • High temperature to reflow soldering guaranteed: +245°C/10s
  • VBR at TJ = VBR at 25°C x (1+αT x (TJ-25))(αT: temperature coefficient, typical value is 0.1%)

Functional Diagram

Application Circuit Diagram - Littelfuse SM15KPA-HRA & SM30KPA-HRA High Reliability Diodes

Datasheets

Publicerad: 2026-01-09 | Uppdaterad: 2026-01-15