Littelfuse
- Company typePublic
- Founded1927
- HeadquartersChicago, United States
- Headcount5,001–10,000
- GTM typeB2B
- OfferingHardware or Manufacturing
Littelfuse firmographics
Firmographics- Name
- Littelfuse
- Legal name
- Littelfuse, Inc.
- Website
- https://littelfuse.com
- Company type
- Public
- Founded year
- 1927
- Operating status
- Operating
- Headcount range
- 5,001–10,000 employees
- Ownership category
- akta.pro rank
Littelfuse industry classification
Industry- Product category
- Circuit Protection and Power Control Components
- NAICS
- Electrical Equipment Manufacturing (33531), Relay and Industrial Control Manufacturing (335314), Wiring Device Manufacturing (33593)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600), Semiconductors & Related Devices (3674), Industrial Instruments For Measurement, Display, And Control (3823)
- akta.pro primary industry
- Varistors & Surge Protection (MOV/TVS-like passive protectors/GDT) (HDAHANAI)
- akta.pro secondary industries
- Power Modules (IGBT/MOSFET/SiC/GaN Modules) (HDAHAHAH), Industrial Safety & Security Electronics Manufacturing (Safety relays, E-stops, light curtains, access control) (IMAGAGAG)
Keywords
Where Littelfuse is headquartered
LocationHeadquarters
- HQ city
- Chicago
- HQ country
- United States
- HQ region
- North America
Offices5 records
Markets served
Littelfuse business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Electronic Components Sales: Littelfuse generates revenue through the design, manufacture, and sale of electronic components including circuit protection devices, fuses, semiconductors, sensors, switches, and protection relays. Products are sold to industrial, transportation, and electronics end markets through distributor networks.
- Distribution Services: The company serves as a distributor of its own products and also receives distribution services from partners like Mouser Electronics for global market access.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | B2B component sales through authorized distributors |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels5 records
Littelfuse product offering
Product offeringCore offering
Littelfuse designs, manufactures, and sells electronic components for circuit protection, power control, and sensing across industrial, transportation, and electronics end markets. Its product portfolio spans fuses, TVS diodes, metal oxide varistors, gas discharge tubes, surge protective devices, MOSFETs (Si/SiC), IGBTs, gate drivers, magnetic and temperature sensors, electromechanical switches, ground fault and arc flash protection relays, solid state relays, and aerospace/defense connectors. Products are sold to OEM customers globally via authorized distributor networks and the company's own e-commerce platform.
Product overview
Littelfuse is a diversified industrial technology manufacturing company offering a comprehensive portfolio of circuit protection, power control, and sensing solutions. The product portfolio centers on five core technology areas: (1) Circuit Protection Products including fuses, TVS diodes, MOVs, GDTs, and SPDs for overcurrent and overvoltage protection; (2) Power Semiconductors including MOSFETs (Si/SiC), IGBTs, and gate drivers for power conversion; (3) Sensors including TMR magnetic switches, temperature sensors (NTC), and speed sensors; (4) Switches including tactile, DIP, and load switches; and (5) Protection Relays including GFCIs and arc flash relays. Additionally, Littelfuse offers Solid State Relays and Aerospace & Defense Connectors (D-Sub, Micro D, MTB1) with ESCC/MIL certifications. Notable product lines include the SB4000 Industrial Shock Block GFCI for personnel protection, FlatSuppressX TVS diode series for automotive load-dump protection, TMR Magnetic Switch Series for position sensing, and the MMIX1T500N20X4 power MOSFET for high-power density applications. The company serves industrial, transportation, electronics, power generation, data center, and aerospace & defense end markets.
Differentiator
Problem solved
Functional benefit
Brands
- C&K Switches: Electromechanical switches brand acquired by Littelfuse in 2022, including D-Sub connectors, Micro D connectors, and SpaceSplice connectors for aerospace and defense applications.
- SpaceSplice
- AeroSplice
- PolySwitch
- FlatSuppressX
- DBMA Savers
Products and services
- Circuit Protection Products
Quantifiable outcome
- Q2 2026 revenue growth of 20% year-over-year to $739 million
- +4 more outcomes
Companies that use Littelfuse
Customer profileNamed customers4 records
Segments5 records
Ideal customer profiles4 records
Littelfuse technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Littelfuse partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered minor and core.
- JREP/Kanematsu CorporationminorJREP, a subsidiary of Kanematsu Corporation, exhibits Littelfuse products including power semiconductors, heat management solutions, and components at TECHNO-FRONTIER 2026 in Tokyo, Japan.
- Analog Devices, Amphenol, Molex, Phoenix Contact, Samtec, Silicon Labs, TE Connectivity, TAIYO YUDENminorLittelfuse participates alongside these major component suppliers in Mouser India's Technical Roadshow 2026 covering automotive/EV ecosystems, AI hardware, and smart manufacturing across three Indian cities.
- Premier FarnellminorPremier Farnell partnership for circuit protection product distribution in Indian markets as part of Littelfuse's regional distribution strategy.
- Mouser ElectronicscoreMouser Electronics is Littelfuse's authorized global distributor, receiving the 2025 Global High Service Distributor of the Year award for exceptional customer service, product breadth, digital engagement, and global accessibility. Mouser distributes to over 650,000 customers in 223 countries.
Scale indicators17 records
Recent moves6 records
Expansion highlights6 records
Littelfuse competitors and assessment
Company assessmentDirect peers
- Sensata Technologies: Sensata is a direct peer to Littelfuse in circuit protection, sensors, and automotive/industrial electronic components. Both companies serve transportation and industrial end markets with overlapping portfolios in fuses, sensors, and protection relays, and compete head-to-head for similar OEM customers.
- Bourns: Bourns is a direct peer in circuit protection, specializing in resistive products, circuit protection devices, and magnetic components for automotive, industrial, and consumer markets. The companies compete directly in overcurrent/overvoltage protection across multiple end segments.
- Bel Fuse: Bel Fuse is a direct peer in circuit protection, magnetics, and power conversion products serving industrial, telecommunications, and military/aerospace markets. The companies overlap meaningfully in fuse products and power solutions for similar end customers.
Broad incumbents
- Eaton: Eaton is a broad incumbent in electrical and industrial power management, including circuit protection, power distribution, and industrial controls. While much larger and more diversified than Littelfuse, Eaton overlaps in electrical protection and competes for similar industrial customers.
- Vishay Intertechnology: Vishay is a broad incumbent in discrete semiconductors and passive components, including MOSFETs, diodes, and resistors — directly overlapping Littelfuse's power semiconductor and circuit protection portfolios. Both serve industrial, automotive, and military/aerospace end markets.
- TE Connectivity: TE Connectivity is a broad incumbent in connectors and sensors, including the recently acquired Aerospace & Defense connector business area where Littelfuse/C&K competes. Both serve transportation, industrial, and aerospace/defense markets with overlapping product portfolios.
- ON Semiconductor: ON Semiconductor is a broad incumbent in power semiconductors (MOSFETs, IGBTs, SiC) directly competing with Littelfuse's power semiconductor portfolio in EV, renewable, and industrial applications. Both companies target similar high-growth electrification end markets.
- Infineon Technologies: Infineon is a broad incumbent and global leader in power semiconductors, automotive electronics, and industrial power solutions. It competes directly with Littelfuse in MOSFETs, IGBTs, and protection products serving the same automotive/industrial end customers.
- Diodes Incorporated: Diodes Incorporated is a broad incumbent in discrete semiconductor products, including protection devices and power management ICs that overlap with Littelfuse's discrete and power semiconductor lines, serving similar automotive, industrial, and consumer customers.
- Amphenol: Amphenol is a broad incumbent in interconnect, antenna, and sensor solutions, including aerospace/defense products that directly compete with Littelfuse/C&K's connector portfolio. Both serve military, aerospace, industrial, and automotive end markets with high-reliability connector solutions.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Littelfuse social profiles
Digital presenceLittelfuse compliance and trust
Trust signalCompliance10 records
Littelfuse financial estimates
Financial estimateRevenue estimate
Valuation estimate
Littelfuse leadership team
Management profileNumber of profiles
Profiles10 records
Littelfuse subsidiaries and ownership
Company hierarchySubsidiaries7 records
Littelfuse funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Littelfuse M&A and investment
M&A and investmentM&A29 records
Investments4 records
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Littelfuse
What does Littelfuse do?
Littelfuse designs, manufactures, and sells electronic components for circuit protection, power control, and sensing across industrial, transportation, and electronics end markets. Its product portfolio spans fuses, TVS diodes, metal oxide varistors, gas discharge tubes, surge protective devices, MOSFETs (Si/SiC), IGBTs, gate drivers, magnetic and temperature sensors, electromechanical switches, ground fault and arc flash protection relays, solid state relays, and aerospace/defense connectors. Products are sold to OEM customers globally via authorized distributor networks and the company's own e-commerce platform.
Is Littelfuse a public or private company?
Littelfuse is a public company. It is classified as public and is currently operating.
When was Littelfuse founded?
Littelfuse was founded in 1927. It employs 5,001 to 10,000 people.
Where is Littelfuse based?
Littelfuse is headquartered in Chicago, United States, in the North America region.
How does Littelfuse make money?
Two revenue lines are on record. Electronic Components Sales are the primary driver. The others are distribution Services.
Who are Littelfuse's main competitors?
Direct peers on record are Sensata Technologies, Bourns and Bel Fuse. Broad incumbents are Eaton, Vishay Intertechnology, TE Connectivity, ON Semiconductor, Infineon Technologies, Diodes Incorporated and Amphenol.
Does Littelfuse have an API?
No public API is recorded for Littelfuse.
What industry is Littelfuse in?
Littelfuse's product category is Circuit Protection and Power Control Components. Its primary akta.pro industry code is HDAHANAI, Varistors & Surge Protection (MOV/TVS-like passive protectors/GDT), with a secondary code of HDAHAHAH, Power Modules (IGBT/MOSFET/SiC/GaN Modules). Its NAICS code is 33531 and its SIC code is 3600.