In the era of interconnected devices, touch technology has become the core mode of interaction for consumer electronics. From multi-touch screens on smartphones to central control panels for smart homes, from gesture recognition in in-car entertainment systems to pressure sensing in wearable devices, touch interfaces are reshaping the way humans connect with the digital world. Behind this revolution in interaction, the SD24C electrostatic protection diode, with its precise electrical characteristics, has become the invisible guardian ensuring a stable and smooth touch experience.

Slkor Electrostatic Discharge Diode SD24C product photo

1. Electrostatic Threats to Smart Touch Technology

The sophisticated development of modern touch technology has made it exponentially more sensitive to electrostatic interference. Take capacitive touchscreens as an example: their operation relies on detecting minute changes in electrical currents from the human body to input commands. However, this sensitivity also makes them vulnerable to electrostatic shocks. Experimental data show that the human body can carry electrostatic voltages of up to 15kV in dry environments. The moment a fingertip touches the screen, it can cause touch chip misjudgments, coordinate drifting, or even hardware damage.

Slkor Electrostatic Discharge Diode SD24C specification

The SD24C's 24V reverse working voltage (VRWM) is ideal for consumer electronics' typical operating scenarios, with a minimum breakdown voltage (VBR min) of 26.7V, designed to trigger avalanche breakdown when electrostatic pulses exceed safe thresholds. Its 43V clamping voltage (VC) ensures transient voltage is precisely controlled within the tolerance range of the touch chip, preventing damage to core components from overvoltage.

Parameters of Slkor Electrostatic Discharge Diode SD24C

2. Technological Breakthroughs in Touch Protection Architecture

This micro device, packaged in SOD-323, achieves precise protection through a multi-layer [敏感词] mechanism. When electrostatic pulses strike, the SD24C can clamp the voltage to a safe level in nanoseconds. Its 50pF junction capacitance (CJ) design not only ensures high-speed signal transmission but also effectively filters out high-frequency noise interference. With an ultra-low leakage current of 1μA (IR), it guarantees no additional load on the touch device's low-power mode during standby, making it particularly suitable for battery-powered portable devices.

In smartphone applications, the SD24C can be deployed between the touch chip and antenna module, forming an electromagnetic isolation zone. Tests show that under 2.4GHz Wi-Fi signal interference, the SD24C can reduce touch sampling rate fluctuations from 17% to 2.3%, enhancing the smoothness of swipe operations by 40%. For smartwatches with pressure sensing, the protective array formed by this device can withstand 8kV contact discharge, maintaining pressure level recognition accuracy above 98.7%.

3. Evolution of Protection Systems for Smart Touch Devices

As touch devices evolve towards full-screen and foldable screens, protection needs have shifted from point protection to system-level [敏感词]. The SD24C can work alongside TVS diodes and inductors to form a three-tier protection network: the first tier absorbs high-energy pulses through gas discharge tubes, the second tier filters low-frequency interference using inductors, and the third tier implements precise clamping by the SD24C. This layered protection architecture has been tested in a brand's foldable screen phone, reducing ESD-induced touch failure rates from 2.1% to 0.03% and lowering the annual return rate by 65%.

It is also noteworthy that the SOD-323 packaging of the device enables a compact design, with a miniature size of 2.5mm×1.35mm, allowing flexible deployment in high-density PCB layouts. In the circular touch panel design of smart speakers, this feature provides valuable space for antenna routing, reducing signal transmission loss by 1.2dB and improving voice wake-up rate by 18%.

4. The Future Outlook of Protection Technology for Interaction

With the evolving demands of touch technology, next-generation protective devices may integrate smart diagnostic functions. By embedding temperature-sensitive elements within the diode structure, these devices could visualize the health status after ESD damage. This intelligent protection solution, combined with the low-power characteristics of the SD24C, will drive the evolution of touch devices toward zero-failure, self-sensing capabilities, ultimately creating an immunity-enabled, full-scenario interactive ecosystem.

From the precise clicks on smartphones to natural gestures in spatial interactions, every flawless human-computer dialogue depends on the silent protection of underlying components. With its meticulous design, the SD24C is redefining the safety boundaries of smart touch devices, making the interaction between technology and humanity more graceful and seamless. As electrostatic protection becomes the invisible cornerstone of digital existence, we take another crucial step toward the future interactive world where "what you think is what you touch."

About Slkor：

Slkor has research and development offices in Busan, South Korea, Beijing, China, and Suzhou, China. Most of the wafer manufacturing and packaging and testing are carried out within China. The company employs and collaborates with individuals and organizations worldwide, with a laboratory for product performance and reliability testing and a central warehouse located at its headquarters in Shenzhen. Slkor has filed for over a hundred invention patents, offers more than 2,000 product models, and serves over ten thousand customers globally. Its products are exported to countries and regions including Europe, the Americas, Southeast Asia, and the Middle East, making it one of the rapidly growing semiconductor companies in recent years. With well-established management systems and streamlined workflows, Slkor has rapidly enhanced the brand awareness and reputation of its "SLKOR" brand through its outstanding quality and standardized services. Its product range includes three major series: diodes, transistors, and power devices, with recent introductions of new products such as Hall elements and analog devices, expanding its presence in sensors, Risc-v microcontrollers, and other product categories.