Ultra-Compact ESD Protection: Slkor SLESD0402-V05 for High-Frequency Applications

As smartphones achieve transmission rates exceeding 10Gbps and the PCB density of wearable devices increases by 50%, the demand for electrostatic protection in high-frequency low-voltage circuits has become more urgent than ever. A tiny electrostatic shock can distort signals at high-speed data ports; a protection device that is too large can disrupt the layout of miniature devices. The SLESD0402-V05 ESD protection diode launched by Slkor, with its ultra-small 0402 package and ultra-low 1.5pF junction capacitance, has become an ideal protection choice for high-frequency scenarios.

As a protection device designed for high-frequency low-voltage scenarios, the core advantage of the SLESD0402-V05 lies in its "small yet precise" nature. It adopts the 0402 package (typical dimensions 1.00mm×0.50mm), which is only one ten-thousandth the size of a fingernail, yet can easily fit into high-density layouts such as smartphone motherboards and smartwatch sensors, saving valuable PCB space for designers. In terms of electrical performance, the 5.0V reverse working voltage precisely adapts to mainstream low-voltage circuits, ensuring no interference with signal transmission during normal operation; the 140V breakdown voltage acts like a solid*line, quickly conducting and safely diverting excessive current when electrostatic discharge occurs.

More importantly, it perfectly balances protection capability and signal compatibility. The ultra-low leakage current of 500nA consumes almost no additional power, extending device battery life; the 1.5pF junction capacitance has minimal impact on high-frequency signal transmission, making it suitable for high-speed interfaces such as USB 2.0 and IEEE 1394, avoiding signal attenuation or phase shift. In terms of protection capability, it complies with the IEC 61000-4-2 standard, with air discharge up to 8kV and contact discharge up to 15kV. The clamping voltage is only 65V under a single 8kV contact discharge, and it can withstand over 1000 shocks, reliably protecting electrostatically vulnerable parts such as mobile phone charging ports and HDTV data ports.

From consumer electronics to industrial equipment, the SLESD0402-V05 has a wide range of applications: USB interfaces of smartphones, touch circuits of tablets, high-speed data links of HDTVs and DVD players, and even signal lines of industrial sensors can all resist electrostatic threats through it. Its fast response characteristic (nanosecond level) ensures action at the moment electrostatic discharge occurs, and combined with the bidirectional protection design, it can effectively divert both positive and negative static electricity.

A responsible person from Slkor's high-frequency protection product line stated, "The design logic of the SLESD0402-V05 is to make the protection device 'invisible' in high-frequency circuits — it neither takes up space nor interferes with signals, yet stands out when needed. This is a precise response to the trend of 'high-speed and miniaturization' in electronic devices."

Currently, the SLESD0402-V05 has achieved stable mass production, complying with RoHS standards and MSL 3 moisture sensitivity level, and is compatible with lead-free reflow soldering processes (peak temperature 260℃/10 seconds). For more details, please visit Slkor's official website (SLKOR Semiconductor: Discrete Semiconductors, TVS、ESD、diodes、 components、transistors、mosfet、igbt、Rectifier、Discrete Power Devices、SCR、TRIAC、Zener Diode; Integrated Semiconductors, Op-amp、hall sensor、 Linear Regulator / LDO、DC-DC Convertor、AC-DC Convertor and Optocoupler).

About Slkor：

SLKOR, headquartered in Shenzhen, China, is a rapidly emerging national high-tech enterprise in the power semiconductor sector. With R&D centers in Beijing and Suzhou, its core technical team originates from Tsinghua University. As an innovator in silicon carbide (SiC) power device technology, SLKOR's products are widely used in new energy vehicles, photovoltaic power generation, industrial IoT, and consumer electronics, providing critical semiconductor solutions to over 10,000 clients globally. The company delivers more than 2 billion units annually, with its SiC MOSFETs and 5th-generation ultrafast recovery SBD diodes setting industry benchmarks in efficiency ratio and thermal stability. SLKOR holds over 100 invention patents and offers 2,000+ product models, continually expanding its IP portfolio across power devices, sensors, and power management ICs. Certifications including ISO 9001, EU RoHS/REACH, and CP65 compliance demonstrate the company's steadfast commitment to technological innovation, lean manufacturing, and sustainable development.