The SM15KPA-HR/HRA and SM30KPA-HR/HRA families are among the few high-power, high-reliability SMT TVS diodes developed specifically for avionics, supporting lightning surge protection up to RTCA/DO?160 Waveform 5A Level 5.
Littelfuse has introduced its new SM15KPA-HR/HRA and SM30KPA-HR/HRA High-Reliability TVS Diode Series, designed to deliver robust lightning-induced transient protection for avionics, aviation electronics, defense systems, eVTOL platforms, and other mission-critical applications that demand high power, high reliability, and stringent screening.
Housed in a compact SPD4-1 surface-mount package, these devices provide 15 kW or 30 kW peak pulse dissipation (10/1000 -s) while fully supporting standard SMT pick-and-place assembly offering a clear advantage over traditional high?power axial TVS diodes.
Both series deliver sub?1 ps response time, strong clamping performance, low incremental surge resistance, and reliable operation across a -55 °C to 150 °C junction temperature range.
The SM15KPA-HR/HRA and SM30KPA-HR/HRA families are among the few high-power, high-reliability SMT TVS diodes developed specifically for avionics, supporting lightning surge protection up to RTCA/DO-160 Waveform 5A Level 5.
Each device undergoes extensive screening, including 100% surge testing, high-temperature storage, temperature cycling, X-ray inspection, HTRB testing, and final electrical characterization in line with MIL-STD-750.
Key features and benefits include:
- Up to 15 kW or 30 kW peak pulse powerfor lightning and high-energy surge protection.
- 30 kV ESDprotection for data lines per IEC 61000?4-2, plus EFT immunity per IEC 61000-4-4.
- Excellent clamping behavior with low incremental surge resistanceand <1 ps response time for sensitive circuitry.
- High-temperature reflow capability (245 °C / 10 s), matte-tin, RoHS-compliantconstruction, and whisker testing per JEDEC JESD201A.
- DO-160 Waveform 5A Level 5protection capability for demanding aerospace environments.
Typical target markets and applications include:
- Avionics flight computers and control systems.
- Navigation, communication, and radar electronics.
- eVTOL propulsion and battery management systems.
- Defense and aerospace power distribution modules.
- High-reliability industrial and transportation platforms that must withstand lightning surges and severe transient events.
Availability
The SM15KPA-HR/HRA and SM30KPA-HR/HRA Series TVS diodes are available in tape and reel format in quantities of 500. Sample requests are accepted through authorized Littelfuse distributors worldwide.
For a listing of Littelfuse distributors, CLICK HERE
For More Information
Additional information is available on the SM15KPA-HR/HRA and SM30KPA-HR/HRA TVS Diode Series product pages.
Leadership Comment
“These new high-power TVS diodes in a surface-mount package give avionics system designers the performance margins they need while supporting standard SMT automatic pick-and-place assembly,” said Charlie Cai, Director of Product Management, Protection Business, SBU. “They provide superior protection for high-reliability applications without the size, weight, or assembly constraints of traditional solutions.”
