USBLC6-2SC6: Very low capacitance ESD protection for USB 2.0, Ethernet, Video lines

The USBLC6-2SC6 by STMicroelectronics is a highly specialized component designed for the ESD protection of high-speed interfaces. This includes USB 2.0, Ethernet connections, and video lines. Its primary function is to shield sensitive electronic circuits from electrostatic discharges (ESD), which can cause damage or degrade performance. The component achieves this with a very low line capacitance, ensuring signal integrity is maintained without compromising on ESD protection.

The USBLC6-2SC6 is characterized by its very low capacitance between lines to ground, optimized for data integrity and speed. This is crucial for applications requiring high-speed data transfer, such as USB 2.0 ports and Ethernet links. Furthermore, the device provides a very low leakage current, enhancing the operational life of battery-powered devices. It is packaged in either SOT-666 or SOT23-6L, offering flexibility in design and minimizing PCB space consumption.

Key Specifications and Features

  • Data-Line Protection: 2 lines
  • Capacitance: Max 3.5 pF
  • Leakage Current: Max 150 nA
  • Package Options: SOT-666 and SOT23-6L
  • ESD Protection: IEC 61000-4-2 level 4 (15 kV air discharge, 8 kV contact discharge)
  • Signal Integrity: Very low capacitance matching tolerance (I/O to GND = 0.015 pF)
  • Compliance: USB 2.0 requirements

USBLC6-2SC6 Datasheet

USBLC6-2SC6 datasheet (PDF)

USBLC6-2SC6 Substitutes
Equivalent alternate parts that may serve as a substitute for USBLC6-2SC6, most popular parts first


  • USB 2.0 ports up to 480 Mb/s
  • Ethernet port: 10/100 Mb/s
  • SIM card protection
  • Video line protection
  • Portable electronics


ESD Protection Devices

General information

Electrostatic Discharge (ESD) protection devices are critical components in safeguarding electronic circuits from sudden and momentary electric currents caused by ESD. These devices help to prevent damage to electronic parts that are sensitive to high voltages. ESD protection is particularly important for high-speed data interfaces, such as USB, Ethernet, and video lines, which are susceptible to interference and damage from electrostatic discharges.

When selecting an ESD protection device, engineers should consider factors such as the capacitance of the device, as low capacitance is essential for maintaining signal integrity in high-speed applications. Additionally, the device's ability to protect against specific ESD levels (measured in kilovolts) is crucial. The package size and the number of lines that need protection are also important considerations, as these factors can influence the overall design and footprint of the PCB.

The USBLC6-2SC6 offers very low capacitance and leakage current, making it an excellent choice for protecting interfaces that require high data integrity and speed. Its compliance with IEC 61000-4-2 level 4 standards ensures robust protection against ESD strikes, providing greater immunity at the system level. Moreover, its small package options allow for flexible design choices and minimal space consumption on the PCB.

In summary, the selection of an ESD protection device should be guided by the specific requirements of the application, including the speed of the interface, the level of ESD protection needed, and the physical constraints of the PCB design. The USBLC6-2SC6 is a compelling option for engineers looking to incorporate ESD protection without compromising on performance or design flexibility.

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