Kailh Jellyfish Linear Switches

The Kailh Jellyfish Linear is a smooth, linear mechanical switch suited for users who prefer a consistent keystroke without tactile bumps or clicks. It fits well for typists and gamers seeking a fluid typing experience with moderate actuation force. Its transparent housing enhances RGB lighting effects, making it a good choice for keyboards with customizable backlighting.

Feel & Sound

This switch offers a smooth, linear feel with no tactile feedback or audible click. The factory pre-lubrication reduces scratchiness, providing a quieter and more refined keystroke. The sound profile is relatively muted compared to clicky or tactile switches, though bottoming out may still produce some noise depending on the keyboard build.

Actuation Characteristics

The actuation force is moderate, requiring about 60g to register a keypress, which balances responsiveness and fatigue for extended use. The pre-travel distance is around 2mm, allowing for a quick response without accidental keypresses. Total travel is approximately 4mm, offering a familiar depth for most users. Bottoming out feels smooth due to the pre-lube and spring design.

Build Quality

The housing is made of polycarbonate, which is durable and transparent for RGB lighting. The stem uses high-molecular polyamide, contributing to smooth keystrokes and durability. Springs are standard length, supporting consistent force throughout the keypress. The switch is rated for 50 million keystrokes, indicating long-term reliability. Gold-plated contacts help maintain stable electrical performance.

Compatibility

This is a 5-pin PCB mount switch, compatible with most standard mechanical keyboard PCBs. The transparent housing allows RGB lighting to shine through clearly. It is not specified if it supports hot-swap sockets, so compatibility with hot-swap boards is unknown.

Trade-offs

While pre-lubrication improves smoothness, some users may still prefer additional lubing to reduce any residual scratchiness. The linear design lacks tactile feedback, which may be less satisfying for those who prefer a noticeable bump or click. Dust and water resistance add durability but do not guarantee protection against heavy exposure. The switch may exhibit some stem wobble typical of polyamide stems, which can affect typing precision for sensitive users.