The new diodes protect EV and car electronics from voltage spikes while staying small so engineers can upgrade systems without changing the board.
Littelfuse, Inc. has introduced the SZSMF6L Series of TVS diodes to protect automotive and EV electronics from high-energy voltage spikes. These diodes help prevent damage from switching events, load dumps, or electrostatic discharge, ensuring critical systems continue to work reliably.
The series is suitable for a range of automotive systems, including EV powertrains and inverters, battery management systems, on-board chargers, power distribution units, body control modules, domain and zone controllers, and automotive lighting systems.
These diodes make it easier to design compact, reliable electronics that can handle high-energy transients, and they allow engineers to upgrade from the SZSMF4L Series when higher power handling is required.
The company claims that the series can handle 600 W peak pulse power in a small SOD-123FL surface-mount package, making it suitable for designs with limited space. Compared with the previous 400 W SZSMF4L Series, it offers 50% higher peak power handling while keeping the same footprint. This allows electronics to survive strong voltage spikes without increasing component size.
Key Features:
- 600 W peak pulse power (10/1000 µs) in a compact SOD-123FL package
- Working peak reverse voltage: Unidirectional 5–75 V; Bidirectional 10–75 V
- Fast response time <1 ns to reduce exposure to transients
- Planar chip design for low leakage and consistent clamping
- High operating temperature up to 175 °C
- AEC-Q101 qualified and PPAP capable
- 16 kV ESD rating (HBM Class 3)
“The SZSMF6L Series addresses the evolving demands of EV and automotive system designers who need greater transient protection without compromising board space,” said Charlie Cai, Director Product Marketing SBU at Littelfuse. “With the transition to zonal architectures and the continued push for miniaturization, this 600 W solution offers engineers a more robust and thermally reliable alternative to the SZSMF4L for high-stress environments.”
