Littelfuse AK-FL Series Flat-Clamping TVS Diodes Protect Aviation Power Systems
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.
Littelfuse AK-FL Series FlatSuppressX flat-clamping TVS diodes
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)
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.
