Characterization Engineer
About the job
- A bachelor's degree in Electrical Engineering, Electronics Engineering, or a related engineering discipline.
- Two to five years of relevant engineering experience.
- Experience creating verification plans, test benches, and automated parameter testing solutions.
- Experience preparing and presenting characterization and verification reviews.
- Hands-on experience with oscilloscopes, parameter analyzers, PXI systems, or similar laboratory instrumentation.
- Knowledge of electrical measurement circuit and test setup design.
- Knowledge of PCB design principles.
- Understanding of fast di/dt and dV/dt switching events and their impact on measurements and characterization.
- Understanding of power electronic circuit design and test circuitry development.
- Experience with thermal measurements and JEDEC standards for thermal characterization (Rth/Zth).
- Programming and scripting skills in one or more of Python, MATLAB, LabVIEW, C/C++, C#, or MS Office tools.
- Strong written and verbal English communication skills for collaboration with global engineering teams.
- Ability to communicate technical information clearly and professionally.
- Willingness to work in a highly collaborative international environment.
- Perform characterization and verification activities on power semiconductor devices, including SiC diodes, SiC MOSFETs, Schottky diodes, IGBTs, and related technologies.
- Study and understand device specifications and technical requirements.
- Define characterization and verification plans to achieve complete functional coverage.
- Develop test specifications in close collaboration with design engineers and product definition teams.
- Execute electrical measurements, collect data, and analyze results.
- Report failures, propose corrective actions, and support issue resolution.
- Develop and/or operate characterization and verification setups and automated test environments.
- Prepare and lead design verification reviews.
- Generate technical reports, data sheets, and design documentation.
- Contribute to the development and continuous improvement of laboratory capabilities, methodologies, and best practices.
About the company
Littelfuse is a diversified industrial technology manufacturer that designs and delivers products for the safe and efficient transfer of electrical energy. Its portfolio includes fuses, protection devices, sensors, and related components used across industrial, transportation, and electronics markets. The company serves more than 100,000 end customers from a global footprint spanning 20+ countries and about 16,000 associates, with a history dating back over 95 years. Littelfuse differentiates itself through its broad, deep product portfolio, broad geographic reach, and long-standing commitment to reliable, safe electrical solutions. Its goal is to provide dependable technologies that support safe power transfer and energy management across industries, continuing to grow its presence and impact while maintaining a diverse and inclusive workforce.
Company Size
5,001-10,000
Company Stage
IPO
Headquarters
Rosemont, Illinois
Founded
1927
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Simplify's Take
What believers are saying
- Q2 2026 sales reached $739 million, up 20%, with 23.6% adjusted EBITDA margin.
- September 22, 2026 AK-FL FlatSuppressX TVS diodes target aviation power systems.
- September 17, 2026 solid-state contactors expand Littelfuse exposure in heating and motor-control applications.
What critics are saying
- The Allen, Texas power semiconductor facility closes in 2027, risking execution disruption and savings delays.
- Karim Hamed replaces Deepak Nayar on January 1, 2027, creating leadership uncertainty.
- Data-center growth depends on higher-voltage design wins scaling in 2027; misses trap Littelfuse in commoditized protection hardware.
What makes Littelfuse unique
- Littelfuse spans fuses, semiconductors, sensors, and switches across industrial and transportation systems.
- Its 100,000-customer installed base creates deep specification lock-in and replacement demand.
- The 2026 Basler acquisition broadened grid, utility, and data-center exposure.
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
401(k) Company Match
Paid Vacation
Paid Holidays
Life Insurance
Disability Insurance
Professional Certification Support
Flexible Work Hours
Remote Work Options
Growth & Insights and Company News
6 month growth
19%1 year growth
19%2 year growth
19%Ultra-low capacitance TVS diode arrays. 7 October 2026 Littelfuse has announced AQ4315-01ETG and SP4315-01WTG, two new Bidirectional TVS Diode Arrays (SPA Diodes) that combine industry-leading low clamping voltage with ultra-low capacitance to protect today's 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 1 V to save energy and reduce EMI. Conventional TVS diodes force a trade-off between low clamping voltage and low capacitance, and many competing devices advertise a lower breakdown voltage while still clamping at levels that leave protected chips exposed to damage. The AQ4315-01ETG and SP4315-01WTG close that gap, holding clamping voltage to a typical 4.5V to 6.5V while suppressing ESD transients ranging from 8,000V to 20,000V down to well under 10V at the protected device, an 800- to 2,000-times reduction in the voltage and current reaching the IC and keeping it safely within its Safe Operating Area (SOA). "The industry is moving toward lower-voltage, higher-speed interfaces faster than traditional ESD protection can keep up," said Sophia Hu, Assistant Product Marketing Manager, Diode Arrays, Littelfuse Protection Business Unit. "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, as much as a tenfold improvement over comparable TVS diodes * 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) for fast, easy design-in * 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 well 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 1V. Both devices let design teams move quickly from inferior protection schemes to a solution engineered for today's most sensitive, highest-speed interfaces. Keep up to date with the most important news. Sensirion environmental sensors enable advanced air quality monitoring. Farnell to strengthen rugged connectivity solutions globally. 7 October 2026
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]
Littelfuse expands Omnipolar TMR Switch family with Leaded TO-92 package option. September 22, 2026 Littelfuse, an industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy, announced the TX00AT314AMA Omnipolar TMR Switch Sensor, the latest addition to the TX00 TMR Switch family. The TX00AT314AMA delivers the same proven performance as the SOT-23-3 TX00AS314TRA - high sensitivity, ultra-low 1.5 μA power consumption, omnipolar detection, and up to 1 kHz switching speed - in a leaded TO-92 package and with South Korea country of origin, providing design teams with a new form factor option and a diversified supply chain. The TX00AT314AMA integrates a precision TMR (Tunnel Magnetoresistance) sensing element with CMOS signal-processing circuitry - including an on-chip voltage generator, low-noise amplifier, comparator, and Schmitt trigger - to deliver accurate switching, strong noise immunity, and excellent thermal stability. Like its SOT-23-3 sibling, it features X-axis (in-plane) magnetic sensing for detection of fields parallel to the sensor surface, offering greater mechanical design flexibility. The device operates with a typical supply current of just 1.5 μA and supports high-speed detection up to 1 kHz. Like all TX00 family members, the TX00AT314AMA features omnipolar detection, allowing it to respond to both North and South magnetic poles without polarity alignment constraints. Its precise operate and release thresholds, combined with built-in hysteresis, ensure clean, bounce-free switching even in electrically noisy environments. "The TX00AT314AMA gives design engineers a new way to access the TX00 platform's proven performance," said Bavly Obaid, Global Product Manager, Sensors at Littelfuse. "The TO-92 package supports through-hole assembly and prototype-friendly integration, while South Korea origin gives our customers a concrete option for supply chain diversification - two things that matter a great deal in today's design environment." Key features and benefits. * Ultra-low power consumption (1.5 μA typ.) extends battery life in always-on systems * High sensitivity (~14 Gauss) enables reliable detection with small magnets * Omnipolar sensing simplifies design and reduces alignment requirements * Fast response (up to 1 kHz) supports dynamic and rotational sensing * Integrated signal conditioning and hysteresis improve noise immunity and switching stability * Leaded TO-92 package supports through-hole assembly and prototype-friendly integration Markets and applications. The TX00AT314AMA is designed for applications requiring low power, high reliability, and prototype-to-production flexibility, including: * Building and home automation (smart meters with tamper detection, position and limit sensing) * Industrial automation (proximity sensing} * Consumer electronics (appliances, power tools, battery-powered IoT and wearable devices) * Utilities (gas, water, and heat metering) By combining proven TX00 performance with a through-hole form factor and diversified origin, the TX00AT314AMA helps engineers design smaller, smarter, and longer-lasting products while reducing maintenance requirements and improving system reliability. The TX00AT314AMA expands packaging and sourcing options within the Littelfuse TX00 TMR Switch family, giving design teams greater flexibility without sacrificing the performance characteristics engineers already rely on. TX00AT314AMA Omnipolar TMR Switch Sensor faqs. What makes TMR technology better than Hall-effect sensors? TMR sensors offer higher sensitivity and significantly lower power consumption than Hall-effect devices. This enables reliable detection with smaller magnets while extending battery life in always-on applications. What does omnipolar sensing mean for designers? Omnipolar sensors detect both North and South magnetic poles, eliminating the need for precise magnet orientation. This simplifies mechanical design and reduces assembly complexity. How does the TX00AT314AMA compare to the TX00AS314TRA? The TX00AT314AMA shares identical electrical and magnetic characteristics with the TX00AS314TRA - including 1.5 μA supply current, 14 Gauss sensitivity, and 1 kHz switching speed - but in a leaded TO-92 package with South Korea country of origin. It is the right choice when through-hole mounting, prototype breadboarding, or supply chain diversification is a priority. What types of applications benefit most from this sensor? Applications that require continuous operation, compact size, and high reliability - such as smart meters, proximity switches, and portable electronics - benefit most from its performance. How does the device maintain reliable switching in noisy environments? An integrated Schmitt trigger and precise hysteresis ensure stable switching behavior. This prevents false triggering and ensures clean output signals even in electrically noisy systems. What are the key differentiators of the TX00AT314AMA within the TX00 family? Two things set the TX00AT314AMA apart from others in the TX00 family: its leaded TO-92 package, which enables through-hole PCB assembly and straightforward prototyping, and its South Korea country of origin, which provides a non-China sourcing option for customers managing supply chain risk. Performance specifications are identical to the TX00AS314TRA. Why does country of origin matter for the TX00AT314AMA? The TX00AT314AMA is manufactured in South Korea, making it one of the first Littelfuse TO-92 magnetic switches with a non-China origin. For customers navigating tariff exposure, trade policy risk, or internal supply diversification requirements, it provides a qualified, performance-identical alternative to the TX00AS314TRA without requiring a redesign.
Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, today announced the comple...