Littelfuse Launches New Low-Capacitance TVS Diode Arrays
The new components provide high-level ESD protection for high-speed interfaces without sacrificing signal integrity.
Updated on Oct. 21, 2026 in Semiconductors
Littelfuse has released two new transient voltage suppression (TVS) diode arrays designed to protect high-speed electronic interfaces from electrostatic discharge. These components are now available and provide high-level protection while maintaining minimal parasitic capacitance.
Why it matters
As high-speed data interfaces adopt lower signal voltages, they become increasingly sensitive to electrical damage and signal degradation. These new diodes offer a solution that balances robust ESD suppression with the low capacitance necessary to maintain signal integrity in compact systems.
The AQ4315-01ETG and SP4315-01WTG provide a 6.5V clamping voltage at 7A peak surge current and maximum leakage current of 50nA. They are rated for ±15kV contact and ±20kV air ESD strikes per IEC 61000-4-2 standards.
The players
Littelfuse
An industrial technology manufacturing company that specializes in circuit protection, power control, and sensing products for the electronics and automotive industries.
The details
These TVS diodes act as shunts that redirect harmful electrostatic discharge (ESD) away from sensitive data lines. The SP4315-01WTG uses a 0201 wafer-level chip-scale package (a compact footprint where the die is mounted directly onto the board) to minimize space, while the AQ4315-01ETG utilizes a SOD-882/DFN1006 package. By keeping parasitic capacitance—unintended electrical storage that interferes with high-frequency signals—as low as 0.17pF, the devices prevent the distortion of fast data packets.
Timeline
October 21, 2026: Littelfuse announced the launch of the new diode arrays.
The Tech Race
This release follows the industry-wide mandate to meet the IEC 61000-4-2 standard for robust ESD protection. It specifically targets the competitive challenge of shrinking physical footprints in high-speed hardware without sacrificing current-handling capacity.
Designers of high-speed consumer and automotive electronics can begin integrating these parts immediately to protect sensitive signal lines. The parts are currently shipping for use in compact hardware designs that require both AEC-Q101 automotive qualification and strict signal purity.
The takeaway
Littelfuse is continuing to push the density limits of circuit protection while maintaining strict voltage clamping performance. Engineers should monitor the specific integration of the AQ4315-01ETG in automotive systems to see how it performs under the wider -40°C to +150°C temperature requirement.
Further reading
For more on the latest hardware components, visit our Semiconductors section.
