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Toshiba Launches Ultra-Low Capacitance TVS Diode that Protects High-Frequency Antennas of IoT Devices from ESD

February 24, 2022

KAWASAKI, Japan—Toshiba Electronic Devices & Storage Corporation ("Toshiba") has launched “DF2B6M4BSL,” an ultra-low capacitance TVS diode for high-frequency antennas. The diode protects semiconductors and other electronic components from static electricity and noise while suppressing signal deterioration. Shipments of the new product start today.

Electronic components in the high-frequency antennas used in radio communications, such as Wi-Fi®, need to be protected by suppressing high harmonic distortion. DF2B6M4BSL delivers a total capacitance of 0.15pF (max.), the lowest offered by Toshiba, about 25% lower than its existing product, DF2B6M4ASL. The new TVS diode uses this ultra-low capacitance to suppress high harmonic distortion that affects antenna reception performance, and also reduces static electricity and noise that affect the components.

ESD suppressors are sometimes used in high-frequency antennas, and they can be replaced by DF2B6M4BSL; TVS diodes have higher protection performance than ESD suppressors, and can reduce static electricity voltage.

In addition to improving the reliability of high-frequency antennas, DF2B6M4BSL is also suitable for ESD protection in signal lines.


  • ESD protection in high-frequency antennas and high-speed signal lines in electronic equipment, such as IoT and mobile devices


  • Low total capacitance: Ct=0.12pF (typ.) / 0.15pF (max) @VR=0V, f=1MHz
  • Low harmonic distortion characteristics
    f=2.4GHz, 20dBm input conditions
    2nd harmonics: -65.5dBm (Reference)
    3nd harmonics: -54.4dBm (Reference)
    f=5.0GHz, 20dBm input conditions
    2nd harmonics: -64.7dBm (Reference)
    3nd harmonics: -55.5dBm (Reference)
  • Low Vpeak voltage: VCL-max-peak=215V (Reference) @IEC61000-4-2 (Contact), +8kV input

Main Specifications


Part number







Electrostatic discharge voltage

(IEC61000-4-2) (Contact)




Working peak reverse voltage VRWM max (V)


Holding voltage VH (V)






Total capacitance Ct typ. (pF)

@VR=0V, f=1MHz





Harmonic distortion

reference (dBm)

@f=2.4GHz, 20dBm input





@f=5.0GHz, 20dBm input





VCL-max-peak reference (V)

@IEC61000-4-2 (Contact), +8kV input


Sample Check & Availability

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Follow the link below for more on the new product.


Follow the link below for more on Toshiba’s TVS Diodes (ESD Protection Diodes) line-up.

TVS Diodes (ESD Protection Diodes)

To check availability of the new product at online distributors, visit:

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* Wi-Fi is a registered trademark of Wi-Fi Alliance.
* Other company names, product names, and service names may be trademarks of their respective companies.

Information in this press release, including product pricing and specifications, content of services and contact information, is current and believed to be accurate on the date of the announcement, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable Toshiba product specifications.

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