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Littelfuse launches new ultra-low capacitance TVS Diode Arrays. Published: 7 October 2026 Littelfuse, an industrial technology manufacturing company, has unveiled two new Bidirectional TVS Diode Arrays (SPA Diodes), the AQ4315-01ETG and SP4315-01WTG, that combine low clamping voltage with ultra-low capacitance to protect the fastest automotive and consumer data interfaces from electrostatic discharge (ESD) without compromising signal integrity High-speed interfaces, such as automotive ADAS, DisplayPort, and USB4, are increasingly vulnerable to ESD damage as data-line voltages drop below 1V to save energy and reduce EMI. Conventional TVS diodes force a trade-off between low clamping voltage and low capacitance. The AQ4315-01ETG and SP4315-01WTG can hold clamping voltage to a typical 4.5V to 6.5V while suppressing ESD transients ranging from 8,000V to 20,000V down to under 10V at the protective device, an 800- to 2,000-fold reduction in the voltage and current reaching the IC and keeping it within its Safe Operating Area (SOA). Sophia Hu, assistant product marketing manager, Diode Arrays, Littelfuse Protection Business Unit, said, "The industry is moving toward lower-voltage, higher-speed interfaces faster than traditional ESD protection can keep up. The AQ4315-01ETG and SP4315-01WTG give designers an extremely low clamping voltage without the capacitance penalty, so they gain stronger ESD and surge protection while preserving the signal integrity and board space their next-generation automotive and consumer designs demand." Key features and benefits. * Ultra-low clamping voltage: typical 4.5V to 6.5V during an ESD strike * Ultra-low capacitance: 0.25pF (AQ4315-01ETG) or 0.17pF (SP4315-01WTG) to preserve high-speed signal integrity * High ESD withstand: +/-15kV contact and +/-20kV air per IEC 61000-4-2; the AQ4315-01ETG also qualifies to ISO10605 * Automotive-grade reliability: AQ4315-01ETG is AEC-Q101 qualified and PPAP capable, rated -40°C to 150°C * Industry-standard packaging: SOD-882/DFN1006 (AQ4315-01ETG) and 0201 WLCSP flip-chip (SP4315-01WTG) * Low leakage current: 50nA maximum to minimise power consumption in battery-powered and always-on designs * Broad protection margin: suppresses ESD transients of 8,000V to 20,000V to under 10V at the protected device Target markets and applications. * Automotive ADAS, DisplayPort, and Gigabit Multimedia Serial Link (GMSL) interfaces * Gigabit Video Interface (GVIF) and Low Voltage Differential Signalling (LVDS) links * 2.5G/5G/10G automotive and consumer Ethernet * Thunderbolt 5.0, USB 3x, and USB4 consumer computing interfaces * Consumer DisplayPort and other high-speed data line interfaces * Industrial machine-to-machine communication protocols and legacy USB interfaces * Space-constrained wearable and portable consumer electronics The AQ4315-01ETG and SP4315-01WTG extend the Littelfuse SPA Diode portfolio into a new class of ultra-low-voltage ESD protection as automotive and consumer interfaces adopt progressively lower data-line voltages, some running below 1 V. Both devices let design teams adopt a solution engineered for sensitive, high-speed interfaces.

Littelfuse adds low-capacitance TVS diodes for fast data links. Reading Time: 4 mins read Littelfuse has announced AQ4315-01ETG and SP4315-01WTG bidirectional TVS diode arrays for electrostatic-discharge protection of automotive and consumer data interfaces. The Littelfuse additions to its SPA diode portfolio address the selection trade-off between clamping voltage, capacitive loading and package size. Technical highlights. The announcement identifies two devices and two package formats. No additional ordering variants or sub-families are named. Littelfuse positions the launch around combining low clamping voltage with low capacitance, rather than reducing either parameter in isolation. Applications and selection. Littelfuse names automotive ADAS, DisplayPort, GMSL, GVIF, LVDS and automotive Ethernet as target applications for AQ4315-01ETG. Its consumer positioning for SP4315-01WTG includes Thunderbolt, USB, DisplayPort, LVDS and Ethernet. These are announced targets, not interface-compliance conclusions established by the source sweep. An official USB-C protection presentation independently places SP4315-01WTG on the device-side USB4 and Thunderbolt data paths. It distinguishes this position from VBUS protection and CC/SBU protection, which use other components. This is an important circuit-level distinction: selecting a data-line ESD suppressor does not establish suitability for the connector's power or configuration lines. Selection should address the following parameters together: * Working voltage and leakage at the full normal signal excursion. * Clamping voltage at a specified pulse current and waveform. * Capacitance under the published measurement conditions. * ESD withstand levels and the associated test configuration. * Package geometry, land pattern and assembly requirements. * Temperature limits and application-specific qualification evidence. Low capacitance addresses channel loading; clamping voltage addresses transient stress at the protected input. Neither alone establishes that the assembled interface will meet its signal-integrity and immunity requirements. Design-in checks. * Obtain both current datasheets before fixing the schematic. Confirm the working-voltage limits, leakage conditions, capacitance limits and clamping test conditions rather than transferring headline figures from the announcement. * Check the protected transceiver's transient tolerance against the complete protection path. Device clamping performance does not replace system-level validation. * Validate signal integrity with the selected package and final PCB routing. Include the protection device and its connections in the channel assessment. * Confirm the manufacturer's outline drawing, recommended land pattern and soldering requirements before layout release. The package names alone are insufficient to define a production footprint. * Request the relevant automotive qualification and PPAP documentation for AQ4315-01ETG where required. Detailed qualification reports were not verified during this review. * Ask Littelfuse for available simulation models, S-parameters, clamping curves and lifecycle notices. No device-specific files in these categories were successfully accessed; that does not establish that they are unavailable publicly. * Confirm sampling and production dates with the supplier. The announcement's FAQ schedules both for October 20, 2026, while its availability paragraph describes the devices as already available. Purchasing should resolve that inconsistency before committing a build. Further reading. This article is based on the Littelfuse announcement and official product-selection and USB-C application documentation. The linked device datasheets could not be retrieved during preparation, so numerical specifications have been withheld pending verification. Engineers should consult the current manufacturer datasheets and supporting documentation for final qualification and design release.

Technical Solutions marketing Manager, Renewables and Datacenter. * Full Time * Category: Data Center * Company: Littelfuse * Chicago, Illinois, United States * Posted 18 hours ago * Expires on: December 25, 2026 Littelfuse is one of America's Best Mid-Sized Companies (Forbes) and has been named one of the Best Places to Work in Illinois (Best Companies Group) for 11 consecutive years. With its global headquarters in Chicago, Illinois, USA, Littelfuse is a leading, global manufacturer of electronic components serving more than 100,000 end customers across industrial, transportation, and electronics end markets. We have more than 17,000 employees with operations in 15 countries. From semiconductors to sensors... switches to fuses and more... we produce billions of electronic components that help our customers empower a sustainable, connected, and safer world. In 2021, Littelfuse had net sales of $2.1 billion. The Technical Solutions marketing Manager, Renewables and Datacenter leads market-facing, system-level adoption of the complete Littelfuse portfolio across Renewables and Datacenter markets by positioning our products as integrated solutions for inverter protection, power distribution, energy storage, microgrids, EV charging at sites, and mission-critical datacenter power systems. Act as a charismatic, technical systems expert who partners with OEMs, integrators, EPCs, and design firms to solve complex power reliability, safety, and efficiency challenges and to convert specification opportunities into design-ins. Success Metrics - Design-In Growth Increase in qualified design-ins and specification inclusions within Renewables and Datacenter accounts. - Revenue Impact Incremental pipeline and revenue attributable to system solution initiatives and events. - Portfolio Adoption Growth in multi-product usage per account and measured system-level wins. - Enablement Effectiveness Usage and impact of technical assets measured by sales feedback and VoC results. - Market Influence Increase in thought leadership presence, published technical pieces, and competitive differentiation. About Your Job: - System Solution Development: Translate customer pain points into integrated Littelfuse solutions spanning circuit protection, surge protection, sensing, power semiconductors, and control components for solar, wind, storage, and datacenter power architectures. - Segment Marketing Strategy: Own global marketing strategy for Renewables and Datacenter verticals including messaging, positioning, targeted campaigns, trade show presence, road shows, and distributor engagement. - Customer Engagement and Design-In: Penetrate OEMs, EPCs, facility operators, and engineering firms to influence specs, run on-site system demos and pilots, and secure end-to-end design wins. - Sales and Channel Enablement: Develop demo kits, application notes, ROI calculators, tablet content, guided-sell scripts, and technical training to equip sales teams, distributors, and reps. - Voice of Customer and Field Feedback: Lead VoC, NPS, and tablet survey programs to capture site-level insights, prioritize portfolio gaps, and validate solution roadmaps. - Thought Leadership and Content Creation: Produce technical whitepapers, case studies, conference presentations, and published articles that position Littelfuse as the go-to systems partner for resilience, efficiency, and safety. - Cross-Functional Collaboration: Align with product management, application engineering, regional sales, and channel teams to accelerate commercialization, pilots, and deployed references. - Market Intelligence: Track competitor launches, regulatory drivers, grid interconnection standards, and datacenter reliability trends to shape positioning and investment priorities. - Program Execution: Lead high-impact events, distributor open houses, and targeted road shows with clear follow-up plans tied to pipeline and conversion KPIs. About You: - Education: Bachelor's degree in electrical engineering, Power Systems, or related technical discipline; MBA or advanced degree preferred. - Experience: 7+ years in technical marketing, application engineering, or product management within renewables, energy storage, power electronics, datacenter infrastructure, or adjacent OEM markets. - Technical Skills: Deep systems-level knowledge of protection, switchgear, inverters, converters, power semiconductors, surge/EMC mitigation, and energy management for renewables and datacenter environments. - Commercial Acume: Track Record Proven success driving specification adoption, multi-product design-ins, and converting technical engagements into commercial outcomes. - Communication Skills Exceptional technical writing, presentation, and executive storytelling for engineering, procurement, and C-suite stakeholders. - Personal Attributes Charismatic, customer-facing, persuasive, and adept at building long-term relationships with OEMs, integrators, and facility owners. - Logistics: Willingness to travel regularly for customer engagements, site visits, and industry events. Littelfuse is an equal opportunity employer committed to empowering every associate to make a difference - everywhere, every day. We offer a comprehensive benefits package, including: * Medical, dental, and vision coverage * 401(k) with company match and annual contribution * Paid time off and 11 holidays * Flexible and remote work options * $850 Lifestyle Spending Account * Tuition reimbursement (up to $20,000) * Lean Six Sigma certification and career development opportunities * Life, disability, and voluntary insurance options. Salary Range: $88,500 - $137,100 The salary offered will vary depending on your location, job-related skills, knowledge, and experience. Set up job alerts and get notified about the new jobs Similar jobs. [my_related_jobs]