High-speed data ports have become standard in everything from flagship smartphones to pocket-sized wearables, but the faster the signal, the more vulnerable it is to electrical transients. Protecting those lines without adding signal distortion is a constant challenge for engineers working on space-limited designs. TDK’s latest additions to its SD0201 series aim to address that challenge by combining ultra-low clamping voltage with extremely compact packaging.
Compact Protection for Modern Interfaces
Each new device measures just 0.58 × 0.28 × 0.15 mm, small enough to disappear into the dense layouts of modern consumer electronics. Despite their size, they are capable of withstanding electrostatic discharges of up to ±15 kV and handling surge currents as high as 7 A. A symmetrical internal structure allows for bidirectional protection, which simplifies PCB routing in multi-layer designs. Low leakage current helps preserve battery life, while dynamic resistance as low as 0.16 Ω reduces voltage drop during fast transients.
Three Variants Tuned for Different Voltage Ranges
Three variants have been introduced, each tuned for a different voltage range. The ±3.6 V model offers 0.65 pF capacitance and suits higher-voltage signal lines that still require fast response times. The ±2 V version increases capacitance slightly to 0.7 pF while maintaining low clamping characteristics. For the most sensitive high-speed links, the ±1 V device pushes capacitance down to just 0.15 pF, making it ideal for gigabit-class interfaces where even small parasitic effects can impact performance.
Designed for Space-Limited, High-Speed Systems
These new TVS diodes are designed with interfaces such as USB Type-C, HDMI, DisplayPort, and Thunderbolt in mind, but their footprint and characteristics make them relevant anywhere a single high-speed I/O line needs protection. From the logic boards of laptops to the miniature PCBs inside wearables, they give designers a way to build in robust transient suppression without compromising speed or wasting board space.
Learn more and read the original press release here.
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