Supplier Map
Brand / Category / Application
Why This Sourcing Map Matters
A sourcing resource for OEM and EMS teams evaluating discrete semiconductor suppliers, China alternatives and qualification checks before RFQ.
This page turns market-insight article context into an evergreen sourcing reference for procurement, engineering and supply-chain teams preparing RFQs or evaluating second-source options.
- Supplier map for MOSFETs, diodes, rectifiers, IGBTs, thyristors, SiC/GaN and protection devices.
- China and global supplier categories for second-source and shortage review.
- RFQ checks for package, rating, qualification, traceability and application risk.
RFQ Fit Review
Specs / Channel / Risk
Diodes and Rectifiers
Review voltage/current rating, recovery speed, package, thermal behavior and availability.
MOSFETs
Compare Rds(on), gate charge, voltage class, package, avalanche rating and thermal limits.
IGBT and Power Modules
Evaluate module format, current class, thermal path, drive requirements and lifecycle.
Protection Devices
Check TVS, ESD, thyristor and small-signal part fit for interface and power protection.
Supplier Landscape
Use this map as an RFQ preparation reference, not as a final approved vendor list.
Global tier-one suppliers
Infineon, STMicroelectronics, Nexperia, Onsemi, Vishay, Diodes Incorporated, ROHM, Toshiba and Renesas remain common references for discrete sourcing.
Suppliers from Taiwan, China
Vendors from Taiwan, China may be relevant for MOSFET, diode, rectifier and small-signal replacement review where qualification permits.
Mainland China full-line suppliers
CR Micro, Silan, Yangjie, Jiejie, Jilin Sino-Microelectronics and related brands are important for China discrete-device mapping.
Wide-bandgap and power specialists
SiC/GaN, IGBT and module suppliers require deeper qualification because electrical stress, thermal design and supply risk are tightly coupled.
Featured Supplier Brands
Brand examples are listed for sourcing reference and RFQ preparation. They do not imply authorization, representation or drop-in replacement suitability.
Infineon / Europe
Main Categories: MOSFET, IGBT, SiC, power discretes
Typical Applications: Automotive, industrial, energy, power conversion
Sourcing Note: A tier-one reference for power discrete and wide-bandgap sourcing reviews.
STMicroelectronics / Europe
Main Categories: MOSFET, diodes, SiC, protection devices
Typical Applications: Automotive, industrial, consumer, power supplies
Sourcing Note: Relevant for broad discrete portfolios and automotive-grade device selection.
Nexperia / Europe
Main Categories: Small-signal discretes, MOSFETs, ESD protection
Typical Applications: Automotive, industrial, consumer, interface protection
Sourcing Note: Often reviewed for automotive and high-volume discrete semiconductor programs.
Onsemi / United States
Main Categories: MOSFET, IGBT, diodes, power modules
Typical Applications: Automotive, industrial, energy, computing
Sourcing Note: Important for power-device sourcing and lifecycle planning.
Vishay / United States
Main Categories: Diodes, MOSFETs, rectifiers, passive components
Typical Applications: Industrial, automotive, power supplies
Sourcing Note: Useful where discrete devices and passive components need combined supplier review.
ROHM / Japan
Main Categories: Diodes, MOSFETs, SiC devices
Typical Applications: Automotive, industrial, power conversion
Sourcing Note: Relevant for SiC and high-reliability power-device sourcing.
CR Micro / Mainland China
Main Categories: Power devices, MOSFETs, discretes
Typical Applications: Industrial, power, automotive, consumer
Sourcing Note: A China discrete-device brand to review for domestic alternatives.
Silan / Mainland China
Main Categories: Power devices, analog ICs, MEMS
Typical Applications: Industrial, appliances, automotive, consumer
Sourcing Note: Useful across mixed-signal and power-device alternative searches.
Yangjie Technology / Mainland China
Main Categories: Diodes, rectifiers, power devices
Typical Applications: Power supplies, automotive, industrial electronics
Sourcing Note: Relevant for diode, rectifier and discrete power-device sourcing.
StarPower / Mainland China
Main Categories: IGBT, power modules
Typical Applications: EV, industrial drives, renewable energy
Sourcing Note: Important for power module and high-current system reviews.
Application Fit Checks
The right supplier depends on use case, qualification depth and supply-chain risk, not only unit price.
- Automotive electronics: AEC qualification, long-term supply, PPAP readiness and controlled channels.
- Power supplies: thermal derating, package compatibility, switching behavior and protection margin.
- Industrial drives and energy systems: module reliability, current headroom and lifecycle support.
- Consumer and appliance designs: stable price, volume availability and package continuity.
- Interface protection: ESD/TVS clamping behavior, capacitance and board-level compliance testing.
RFQ Preparation Checklist
A clearer RFQ helps reduce false matches, unclear quotations and supplier-screening delays.
Define Specs
Part number, package, voltage/current rating, switching speed, thermal limits and target application.
Share Demand
Qualification requirements such as AEC-Q101, PPAP, reliability data or customer approval status.
Request Proof
Acceptable brands, second-source restrictions, annual demand and production schedule.
Review Risk
Traceability, date code, packing, CoC, RoHS/REACH and abnormal quotation risk checks.
Disclaimer: Supplier and brand information is for industry mapping and sourcing reference only. LDeepAI does not claim authorization or partnership unless explicitly stated. All component replacements require buyer-side engineering, quality and compliance validation.
RFQ support
Need sourcing support for this category?
Send us your target part number, quantity, date code, package, application and acceptable alternatives. LDeepAI will help review available sourcing options through verified China supply-chain channels.
Discrete Semiconductor Suppliers and OEM Sourcing Map FAQ
Can a MOSFET be replaced by matching voltage and current only?
No. Buyers should also check Rds(on), gate charge, SOA, package, thermal behavior, switching behavior and qualification status.
Can LDeepAI help with discrete semiconductor shortages?
Yes. LDeepAI can review available sourcing options, China alternatives and supplier-channel risk based on the target part number and application.
Are China discrete semiconductor brands always drop-in replacements?
No. China alternatives may be useful, but engineering and quality teams must validate electrical, thermal, reliability and compliance requirements.