Archive : 7 October 2026 год

Littelfuse has introduced the AK-FL Series FlatSuppressX TVS diodes, an axial-leaded transient voltage suppression solution designed for high-voltage DC aviation and eVTOL power systems. The devices use FlatSuppressX technology to maintain a near-constant, low clamping voltage during high-energy surges, protecting sensitive semiconductor components.

Key Characteristics

• Technology: FlatSuppressX with foldback/snapback I-V characteristic
• Voltage support: 270–800 V DC aviation architectures
• Surge current ratings: 6 kA, 8 kA and 10 kA (8/20 µs waveform)
• Clamping behaviour: near-constant low clamping voltage (does not rise significantly with surge current)
• Screening: 100% MIL-STD-750 tested (visual inspection, surge, temperature cycling, high-temperature reverse bias)
• Package: axial-leaded
• Halogen-free, RoHS-compliant, Pb-free E4 termination
• Supports both reflow and wave soldering
• Helps reduce latch-up risk in Solid-State Power Controllers (SSPC) and other high-voltage semiconductors

Unlike conventional TVS diodes, whose clamping voltage increases with surge current, the FlatSuppressX design keeps the clamping level tightly controlled. This allows designers to use lower-voltage-rated semiconductors while still providing robust transient protection.

Target Applications

• Aerospace and defence power trains
• Solid-State Power Controller (SSPC) circuits
• eVTOL platforms
• Next-generation aircraft electrical systems
• High-reliability avionics DC power rails

Source: Electronics For You