Littelfuse — Supply Chain & Business Relationships

Every relationship below is sourced to a verbatim quote from a public company filing that names the counterparty, with a one-click link to the original document.

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3 suppliers2 customers15 competitors4 ownership ties1 source filing

Featured in supply-chain maps: Analog & Power Semiconductors

Customers (companies it supplies)

Supplies to → Arrow

Filed 2026-02-19 · 137 days ago

“Sales to Arrow Electronics, Inc., which were reported in our Electronics, Transportation, and Industrial segments, were 9.5%, 9.4%, and 11.2% of consolidated net sales in 2025, 2024, and 2023, respectively.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Supplies to → Powersem Equity-method associate ~45%

Filed 2026-02-19 · 137 days ago

“Fiscal Year Ended December 27, 2025 December 28, 2024 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 1.2 $ — $ — $ 1.5 $ — $ — Purchase of material/services from related party 2.2 0.9 9.0 3.8 0.7 5.7 Accounts payable balance $ 0.1 $ 0.1 $ 2.1 $ 0.7 $ 0.1 $ 0.7”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Suppliers (companies that supply it)

Supplied by ← Powersem Equity-method associate ~45%

Filed 2026-02-19 · 137 days ago

“Powersem GmbH: The Company owns 45 % of the outstanding equity of Powersem GmbH (“Powersem”), a module manufacturer based in Germany. … Fiscal Year Ended December 27, 2025 December 28, 2024 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 1.2 $ — $ — $ 1.5 $ — $ — Purchase of material/services from related party 2.2 0.9 9.0 3.8 0.7 5.7 Accounts payable balance $ 0.1 $ 0.1 $ 2.1 $ 0.7 $ 0.1 $ 0.7”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Supplied by ← Eb Tech Equity-method associate ~15%

Filed 2026-02-19 · 137 days ago

“EB-Tech Co., Ltd.: The Company owns approximately 15 % of the outstanding equity of EB-Tech Co., Ltd. (“EB Tech”), a company with expertise in radiation technology based in South Korea. … Fiscal Year Ended December 27, 2025 December 28, 2024 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 1.2 $ — $ — $ 1.5 $ — $ — Purchase of material/services from related party 2.2 0.9 9.0 3.8 0.7 5.7 Accounts payable balance $ 0.1 $ 0.1 $ 2.1 $ 0.7 $ 0.1 $ 0.7”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Supplied by ← Automated Technology Phil Equity-method associate ~24%

Filed 2026-02-19 · 137 days ago

“Automated Technology (Phil), Inc. : The Company owns approximately 24 % of the outstanding common shares of Automated Technology (Phil), Inc. (“ATEC”), a supplier located in the Philippines that provides assembly and test services. … Fiscal Year Ended December 27, 2025 December 28, 2024 (in millions) Powersem EB Tech ATEC Powersem EB Tech ATEC Sales to related party $ 1.2 $ — $ — $ 1.5 $ — $ — Purchase of material/services from related party 2.2 0.9 9.0 3.8 0.7 5.7 Accounts payable balance $ 0.1 $ 0.1 $ 2.1 $ 0.7 $ 0.1 $ 0.7”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competitors

Competes with ↔ Eaton

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc. … In the Transportation segment, the Company’s competitors include Eaton Corporation, Pacific Engineering, MTA (Meccanotecnica Codognese), Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity Ltd. … In the Industrial segment, the Company’s competitors include Eaton Corporation, GE Multilin, and Mersen.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Bourns

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Tdk

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ onsemi

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Infineon

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ STMicroelectronics

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Semtech

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Vishay

Filed 2026-02-19 · 137 days ago

“In the Electronics segment, the Company’s competitors include Eaton Corporation, Bourns Inc., TDK, ON Semiconductor Corporation, Infineon Technologies, STMicroelectronics NV, Semtech Corporation, and Vishay Intertechnology Inc.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Pacific Engineering

Filed 2026-02-19 · 137 days ago

“In the Transportation segment, the Company’s competitors include Eaton Corporation, Pacific Engineering, MTA (Meccanotecnica Codognese), Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Mta Meccanotecnica Codognese

Filed 2026-02-19 · 137 days ago

“In the Transportation segment, the Company’s competitors include Eaton Corporation, Pacific Engineering, MTA (Meccanotecnica Codognese), Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Amphenol

Filed 2026-02-19 · 137 days ago

“In the Transportation segment, the Company’s competitors include Eaton Corporation, Pacific Engineering, MTA (Meccanotecnica Codognese), Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Sensata Technologies

Filed 2026-02-19 · 137 days ago

“In the Transportation segment, the Company’s competitors include Eaton Corporation, Pacific Engineering, MTA (Meccanotecnica Codognese), Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Te Connectivity

Filed 2026-02-19 · 137 days ago

“In the Transportation segment, the Company’s competitors include Eaton Corporation, Pacific Engineering, MTA (Meccanotecnica Codognese), Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Ge Multilin

Filed 2026-02-19 · 137 days ago

“In the Industrial segment, the Company’s competitors include Eaton Corporation, GE Multilin, and Mersen.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Competes with ↔ Mersen

Filed 2026-02-19 · 137 days ago

“In the Industrial segment, the Company’s competitors include Eaton Corporation, GE Multilin, and Mersen.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Ownership & investments

Invests in → Polytronics Technology

Filed 2026-02-19 · 137 days ago

“the Company has an investment in Polytronics Technology Corporation Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Invests in → Powersem Equity-method associate ~45%

Filed 2026-02-19 · 137 days ago

“The Company owns 45 % of the outstanding equity of Powersem GmbH”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Invests in → Eb Tech Equity-method associate ~15%

Filed 2026-02-19 · 137 days ago

“approximately 15 % of the outstanding equity of EB Tech Co., Ltd.”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗

Invests in → Automated Technology Phil Equity-method associate ~24%

Filed 2026-02-19 · 137 days ago

“approximately 24 % of the outstanding common shares of Automated Technology (Phil), Inc., a supplier located in the Philippines that provides assembly and test services”
— LFUS 10-K, filed 2026-02-19 · View source filing ↗