Littelfuse brand introduction

Guangdong Fenghua Brand Introduction Littelfuse: An Innovative Engine in the Global Circuit Protection Field
Brand genes and technological inheritance
Littelfuse, Inc. was founded in 1927 and is headquartered in Chicago, USA. It is a global leader in circuit protection, power control, and sensing technology. Its technical genes stem from the innovation of fuse technology: founder Edward V. Sundt invented the world's first miniature fuse, ushering in the standardized era of overcurrent protection for electronic devices. After nearly a century of development, Lite On has evolved from a single fuse manufacturer to a multinational enterprise providing comprehensive circuit protection solutions.
Construction of core technology barriers
1. Circuit protection technology matrix
Lite has built three major technical pillars in the field of circuit protection:
Overcurrent protection: Through thin film metal melting technology and laser resistance adjustment process, the precise melting characteristics of the fuse are achieved. The 0603 size (0.06 x 0.03 inches) surface mounted fuse can withstand a 10A current surge with a response time of less than 0.1 seconds.
Overvoltage protection: Developed multi-layer resistors (MLV) and transient voltage suppression diodes (TVS) to enhance surge suppression capability to 6000W (8/20 μ s waveform). The SP series TVS diode has a clamping voltage accuracy controlled within ± 5% at a working voltage of 5V.
Over temperature protection: Adopting a composite structure of bimetallic sheet and thermistor, the operating temperature range of the temperature switch covers -20 ℃ to+150 ℃. The KSD series temperature switch achieves a temperature control accuracy of ± 3 ℃ in the battery pack of new energy vehicles.
2. Power semiconductor technology
Lite has entered the power semiconductor field through the acquisition of IXYS company, mastering the following core technologies:
SiC MOSFET: Developed 1200V/180m Ω silicon carbide field-effect transistor, reducing switching losses by 80% compared to silicon-based devices, suitable for photovoltaic inverters and electric vehicle charging stations.
IGBT module: Adopting the sixth generation field cut off technology, the conduction voltage of the 650V/300A module is reduced to 1.7V, and the operating frequency is increased to 50kHz, meeting the driving requirements of industrial motors.
Power integration module: Integrating the drive circuit, protection circuit, and power devices into a 34 × 28mm module to simplify the design complexity of new energy vehicle OBC (on-board charger).
Analysis of Star Product Matrix
1. Fuse series: from miniaturization to intelligence
216 series surface mount fuses: achieve a rated value of 0.5A/32V in size 0402, with an ESR as low as 10m Ω, widely used in smartphones and wearable devices.
835 series car fuse: certified by AEC-Q200, maintains stable performance in the temperature range of -40 ℃ to+125 ℃, and can withstand more than 100000 vibration impacts.
I-series intelligent fuse: integrates current detection and communication functions, reports status in real time through I2C interface, suitable for power management in data centers.
2. Gas Discharge Tube (GDT): The Guardian of Communication Equipment
2030 series GDT: With a surge handling capability of 10kA and a response time of less than 100ns under 10/700 μ s pulses, it has become the preferred solution for lightning protection of 5G base stations.
3038 series GDT: certified by UL 497B, achieving ± 6kV differential mode protection in POE (Power over Ethernet) systems to ensure stable operation of network equipment.
3. Power semiconductor module: the core of energy conversion
SPM series intelligent power module: integrating IGBT, driver IC, and temperature sensor, achieving 98% energy efficiency conversion in variable frequency air conditioning with a failure rate of less than 0.1%.
SiC hybrid module: By combining SiC MOSFET with silicon-based diode, the power density of electric vehicle charging piles is increased to 3kW/L, and the charging time is shortened by 30%.
Market position and industrial layout
1. Global market landscape
Market share: 25% in the circuit protection device market and 38% in the automotive fuse field.
Customer structure: Covering top 10 technology companies such as Apple, Tesla, Huawei, as well as industrial giants such as ABB and Siemens.
Supply chain resilience: Through the "localized production+global research and development" model, we have established production bases in 11 countries including the United States, China, and Mexico, ensuring a 48 hour response time for critical materials.
2. Strategic mergers and acquisitions and ecological construction
Acquisition Action: Acquired IXYS company in 2018 to strengthen power semiconductor technology; Acquired C&K Switch in 2021 to expand the switch and sensor product line.
Ecological Cooperation: Collaborate with CATL and BYD to establish a battery safety laboratory, providing full chain protection solutions from battery cells to systems.
Standard setting: Lead the revision of IEC 60127 "Small Fuse Standard" and promote the development of the industry towards high reliability.
Future Strategy and Industry Impact
1. New energy technology roadmap
In the field of photovoltaics, we have developed 1500V DC fuses that are compatible with centralized and string inverters and have obtained UL 1741 certification.
Energy storage system: Introducing BMS specific fuses with integrated voltage detection and balancing functions to enhance the safety and lifespan of the energy storage system.
Electric vehicles: Develop an 800V high-voltage platform protection solution, including SiC fuses and intelligent distribution boxes, to support ultra fast charging needs.
2. Layout of Industry 4.0
Smart Factory: Deploying AI visual inspection system at the Mexico base to increase the efficiency of fuse appearance inspection by 5 times, with a leakage rate of less than 0.01%.
Digital twin: By optimizing the discharge path design of GDT through simulation technology, the research and development cycle has been shortened by 40%.
Predictive maintenance: embedding health monitoring chips in the power module to provide real-time feedback on device lifespan and achieve planned replacement.
As an innovation engine in the field of circuit protection, Lite On continuously defines the performance boundaries of electronic components through three-dimensional innovation in materials science, precision manufacturing, and system integration. In the wave of new energy revolution and intelligent manufacturing, its technological reserves and ecological layout are driving the industry to evolve towards higher reliability, energy efficiency, and intelligence.