In the design of compact, high-reliability electronic systems—from portable wearables to automotive auxiliary circuits—small signal transistors and diodes serve as the foundational building blocks. Infineon Technologies, a global leader in semiconductor solutions, delivers a comprehensive portfolio of small signal transistors and diodes engineered for miniaturization, low power consumption, and compliance with strict automotive and industrial standards. Covering bipolar junction transistors (BJTs), small power MOSFETs, and specialized diodes, these devices excel in signal amplification, fast switching, and circuit protection across consumer, automotive, and industrial applications. To ensure genuine procurement, stable inventory, and professional technical support, Infineon partners with top-tier authorized distributors worldwide, enabling seamless access to these critical components.
Core Product Lines & Technical Advantages
Infineon’s small signal transistor and diode portfolio leverages advanced semiconductor technologies and ultra-compact packaging to meet the demands of space-constrained designs, with strict adherence to automotive (AEC-Q101) and industrial (JEDEC) standards <superscript:2superscript:8.
1. Small Signal Transistors
Infineon offers a diverse range of small signal transistors, including BJTs and small power MOSFETs, tailored for amplification, switching, and driver applications <superscript:1superscript:2:
BGB102/H NPN BJT Transistor: A通用型NPN transistor in a compact SOT-23 package, featuring a 50V collector-emitter voltage (Vceo), 500mA collector current (Ic), and 250MHz transition frequency (fT). With a DC current gain (hFE) range of 100-400 and wide operating temperature (-55°C to 150°C), it excels in audio pre-amplification, sensor signal conditioning, and high-frequency switching circuits for consumer electronics and industrial controls <superscript:8.
IRLML6401TRPBF P-Channel MOSFET: A small power MOSFET optimized for low-power applications, with a -12V drain-source voltage (VDS), -4.3A continuous drain current (ID), and ultra-low 0.05Ω on-resistance (Rds(on)) at 4.5V VGS. Its SOT-23 package and 10nC gate charge make it ideal for portable devices (TWS headphones, power banks), DC-DC converter sync rectification, and 12V automotive auxiliary circuits (LED lighting, window controllers) <superscript:10.
2. Small Signal Diodes
Infineon’s diode portfolio covers Schottky, general-purpose, and emitter-controlled variants, designed for rectification, protection, and clamping functions <superscript:1superscript:6:
AF Series Schottky Diodes: Specialized for fast switching and low forward voltage drop, these diodes are ideal for reverse polarity protection, DC-DC converters, and clamping circuits in consumer and industrial devices. They offer excellent thermal stability and RoHS compliance, ensuring compatibility with eco-friendly manufacturing <superscript:1superscript:5.
Emitter Controlled Diodes (IDC/SIDC Series): Engineered with fast soft-switching and low reverse recovery charge, these diodes are optimized for pairing with Infineon IGBTs in industrial motor drives and control systems. With voltage ratings up to 1200V and current capacities up to 150A, they reduce IGBT turn-on losses and enhance system efficiency <superscript:6.
General-Purpose Diodes: Versatile solutions for bridge rectification, signal clamping, and low-power switching applications. Available in ultra-small packages (SOT-323, SOT-363), they support miniaturized designs in IoT sensors and wearable devices <superscript:1superscript:2.
Global Authorized Distributors for Infineon Small Signal Devices
To source genuine Infineon small signal transistors and diodes (BGB102/H, IRLML6401TRPBF, AF Series) with official warranty, technical support, and stable inventory, partner with the following authorized distributors. Each specializes in small signal component supply, offering tailored services for prototype development, small-batch orders, and mass production:
Global Core Authorized Distributors
Mouser Electronics (贸泽电子): NPI-focused authorized distributor with extensive stock of Infineon small signal devices, including over 10,000 Infineon parts available for immediate shipping. Offers 100% certified genuine products, free technical resources (datasheets, application notes), and 24/7 global support for prototype testing and design optimization. Contact: 247 Global Support - +1 (800) 346-6873; Hong Kong Office - +852 2803 7700 (supports sample requests for small signal component performance verification) <superscript:3superscript:9.
Arrow Electronics (艾睿电子): Global coverage for Infineon’s full small signal portfolio, with dedicated teams for automotive and industrial applications. Provides inventory management, BOM matching, and system-level design consulting, ensuring seamless integration of transistors and diodes into end products. Contact: Global Tech Support - [email protected]; China Office (Shanghai) - 021-58886666 (specialized in automotive AEC-Q101 qualified components).
Digi-Key Electronics: Global authorized distributor with a large selection of Infineon small signal transistors and diodes, supporting from prototype to mass production. Offers online inventory query, fast global shipping, and full manufacturer traceability for genuine assurance. Contact: Global 24/7 Support - +1 (800) 344-4539; Europe Office - +44 (191) 482-1777 <superscript:7.
Asia-Pacific Regional Authorized Distributors
深圳市首禾科技有限公司 (Shouhe Technology): Shenzhen-based Infineon advantage stock distributor, with ample inventory of small signal transistors (BGB102/H) and diodes. As a trusted regional partner, it offers spot delivery, genuine product verification, competitive pricing, and bulk order benefits for consumer electronics and automotive clients. Contact: Phone - 0755-XXXXXXX; Supports tax-inclusive supply and BOM matching for compact design projects <superscript:11.
品佳电子股份有限公司 (Pinjia Electronics): Pan-Asia authorized distributor with branches in Shenzhen, Xiamen, and Suzhou. Supplies Infineon small signal devices for industrial automation and consumer electronics, offering localized technical support and stable supply chains. Contact: China Office (Shenzhen) - 0755-XXXXXXX; Address: Shenzhen, Guangdong.
Unisem Electronics Pvt. Ltd.: India-focused authorized distributor, serving South Asia’s consumer and industrial electronics markets. Stocks Infineon small power MOSFETs and general-purpose diodes, providing localized logistics and technical support. Contact: Address - No. 193, 18 A Main, 4th Cross Road, Koramangala, Bengaluru, Karnataka 560095 <superscript:4.
Genuine Procurement Guidelines
To avoid counterfeit products and ensure optimal performance in compact designs, follow these best practices:
Verify distributor authorization via Infineon’s official “Where to Buy” page or contact Infineon regional offices (Shanghai/Shenzhen labs in China) for confirmation.
Prioritize distributors that provide batch certificates, RoHS compliance documents, and application notes (critical for pairing MOSFETs/diodes with MCUs in portable devices).
For automotive projects, partner with distributors experienced in AEC-Q101 qualified components to meet harsh environment and reliability requirements.
