A Strategy Built Around Replacing Major Brands

UTC offers a cross-reference search tool on its website, allowing users to quickly identify the UTC equivalent of any existing component. Competitor references covered include Infineon, STMicroelectronics, Vishay, IR, Fairchild/On-Semi, Nexperia, AOS, Rohm, and Toshiba. This direct substitution approach is at the heart of UTC’s product strategy. The company operates as an IDM (Integrated Device Manufacturer): design, wafer fabrication, packaging, and testing are all handled entirely in-house, in facilities certified to ISO 9001, ISO 14001, and IATF 16949.

A Range Structured into 11 Sub-Families

• JFET — Junction field-effect transistors for switching and low-power amplification applications.

• Combo Power MOSFET — N+P or dual-channel combinations in a single package, suited to half-bridge topologies and space-constrained applications.

• Trench Power MOSFET (N-CH and P-CH) — Trench technology offering low on-state resistance (RDS(on)) for voltages from 10 to 250 V. These components are direct drop-in replacements for On-Semi, AOS, Rohm, and Toshiba references.

• SiC MOSFET (N-CH) — Silicon carbide MOSFETs for high-voltage and high-temperature applications: EV chargers, solar inverters, and industrial power supplies.

• SGT Power MOS — Shield Gate Trench (SGT) technology for improved RDS(on) and switching speed performance.

• eGaN FET — Gallium nitride (GaN)-based transistors for very high frequency and very high power density applications.

• Planar Power MOSFET (N-CH and P-CH) — Planar technology up to 1800 V, with direct equivalents to Vishay, Infineon (IR), and Fairchild/On-Semi references.

• Fast Body Diode Power MOSFET (N-CH) — MOSFETs with a fast body diode, designed for synchronous rectification topologies.

• Depletion Mode MOSFET — Normally-on MOSFETs used in startup circuits and protection stages.

A Wide Range of Packages

UTC offers a particularly extensive packaging portfolio, covering both through-hole (THD) and surface-mount (SMD) formats, from classic to the very latest options. Available packages for power MOSFETs include:

• Through-hole packages (THD) — TO-92, TO-126, TO-220 (and variants: TO-220F, TO-220B, TO-220FLP, TO-220FJ…), TO-247 (and variants), TO-251, TO-252, TO-262, TO-263, TO-277, TO-3P (and variants), TO-230.

• Compact SMD packages — SOT-23, SOT-89, SOT-223, SOT-363, SOT-523, SOT-553, SOT-723, as well as DFN formats (DFN2020-6, DFN3030-8, DFN5060-8…), PDFN (PDFN3x3, PDFN5x6), and X2DFN (1010, 1616, 8080).

• SMD power packages — TO-252 (D-PAK), TO-263 (D²-PAK), TO-262, and the TOLL (TO-Leadless) format, available in TOLL-8A and TOLL-8B variants — a modern low-inductance format particularly suited to high-density automotive and industrial applications.

UTC continuously develops new high-power and miniaturized packages in response to market trends, offering a diverse range of packaging options from traditional THD formats to the latest TOLL formats. Dimensional data sheets (PDF) and 3D views for each package are available on the Package page of the website.

An IDM Model That Guarantees Availability

UTC operates three wafer fabrication plants (Taipei, Fuzhou, Xiamen) and one packaging and testing facility, all certified to ISO 9001, ISO 14001, and IATF 16949. This IDM model ensures full control over capacity, production, and technological independence — with no reliance on external foundries. UTC emphasizes its ability to supply high-quality products with no End-of-Life (EoL) risk on its active references.

Applications

UTC MOSFETs are used across a wide range of applications: switching power supplies, photovoltaic inverters, energy storage, variable frequency drives, EV charging stations, consumer electronics, lighting, home automation, and automotive electronics.

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About Unisonic Technologies

Founded in 1990 and headquartered in Taipei, Taiwan, Unisonic Technologies Co., Ltd. (UTC) is a global leader in the design and manufacture of integrated circuits and power semiconductors. With more than 2,300 employees worldwide and production facilities in Fuzhou and Xiamen, UTC operates as a fully integrated IDM (Integrated Device Manufacturer) — controlling every stage from R&D and wafer fabrication to packaging, testing, and global marketing.

UTC holds ISO 9001, ISO 14001 and IATF 16949 certifications, guaranteeing consistent quality and reliability across all product lines. Their vertical integration model ensures superior supply chain stability — a critical advantage in today’s market.

“35 years of semiconductor expertise, three chip fabrication plants, and 2,300+ engineers — all now at your fingertips.”

Product Portfolio

A Complete Range of Semiconductor Solutions

UTC’s broad catalogue covers both analog ICs and discrete power components, addressing the full spectrum of modern electronics design needs.

Analog ICs Voltage regulators, PWM control ICs, amplifiers, comparators, logic ICs, Hall effect switches, reset ICs and more.

Power MOSFETs N-Channel & P-Channel Trench Power MOSFETs, Super Junction MOSFETs (SJMOS) for low and high voltage applications.

Discrete Components BJTs, Fast Recovery Diodes (FRD), TRIACs, SCRs, IGBTs, Schottky diodes, Zener diodes, bridge rectifiers and transient suppressors.

Interface & Logic ICs Voltage translators, interface driver ICs, transistor arrays, bus driver/transceivers, shift registers, optocouplers and audio amplifiers.

Application Markets

Powering Every Industry

UTC components are trusted across a wide range of demanding sectors, from clean energy to automotive electronics.

Key Benefits

High Switching Speed Advanced MOSFET & IGBT technologies delivering fast switching performance for power-critical designs.

Thermal Stability Exceptional thermal reliability across industrial and automotive temperature ranges.

No End-of-Life IDM ownership of fabs ensures long-term product availability without discontinuation risk — a critical factor for long-lifecycle industrial designs.

Robust Circuit Protection High breakdown voltage and high current capability built into every component.

Custom Design Support UTC’s IC design team can adapt products to meet specific customer requirements.

Green & Compliant Lead-free and halogen-free product options, ISO 14001 environmental certification.

Key Advantages

Full IDM Vertical Integration From wafer fab to final packaging — UTC controls every stage, guaranteeing consistency, capacity, and supply chain resilience.

Certified Quality ISO 9001, ISO 14001 and IATF 16949 certified facilities meeting the most stringent industrial and automotive standards.

Broad Product Portfolio Thousands of references spanning analog ICs and discrete components — a single trusted source for your entire BOM.

Proven R&D Capability Continuous innovation driven by a dedicated IC design team, delivering faster, more efficient products tailored to market needs.

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We are pleased to announce our partnership with TOPDIODE Manufacturing, a leading Chinese manufacturer of discrete semiconductors with nearly three decades of industrial expertise. This collaboration marks a significant step forward in our ability to offer our customers high-quality, competitively priced, and fully compliant electronic components — sourced directly from the manufacturer.

Who Is TOPDIODE?

Founded in 1996 and headquartered in Dongguan, Guangdong, China, with manufacturing facilities spread across Hunan and Shandong Provinces, TOPDIODE Manufacturing Company has built a solid reputation as a reliable, integrated producer of discrete electronic components. With a workforce of around 750 employees — including 65 specialized engineers and technicians — and a production capacity reaching 6 billion components, TOPDIODE operates at an industrial scale that few manufacturers in this segment can match.

TOPDIODE serves a diverse range of markets, including consumer electronics, computing, telecommunications, industrial equipment, power conversion, medical devices, and military applications. Its components can be found in everyday products such as televisions, satellite set-top boxes, ADSL modems, power supplies, laptops, digital cameras, energy-saving lamps, and brushless DC motor fans.

A Complete Portfolio of Discrete Semiconductors

The TOPDIODE division specializes exclusively in discrete semiconductors, offering one of the most comprehensive catalogs in the industry. Here’s what’s available:

• Rectifier Diodes — including the iconic M7, 1N4007, S1M, and SM4007 in a wide range of standard packages (DO-41, SMA, SMB).
• Switching Diodes — featuring the universally used 1N4148 (DO-35), LL4148 (LL-34), 1N4148W (SOD-123), and BAV99 (SOT-23), essential for high-frequency and logic circuits.
• Zener Diodes — covering voltage references from 2.4V to 47V across the BZX84C, BZX55C, and BZV55C series, available in DO-35, LL-34, and DO-41 packages.
• Schottky Diodes — with ultra-low forward voltage drop, including the 1N5819, SB1100, SB2200, SB3200, and SS-series (SS32, SS34, SS36), ideal for switching power supplies and high-frequency rectification.
• Fast Recovery Diodes — the FR107, FR157, FR207, FR507, and FR607 series for demanding power conversion applications requiring minimal reverse recovery time.
• TVS Diodes & Diacs — the P4KE, P6KE, and 1.5KE series for transient overvoltage protection across a wide range of industrial and consumer applications.
• Bi-directional Trigger Diodes — DB3 and DB4 (DO-35), LLDB3 (SOD-80), widely used in lighting dimmers and power regulators.
• Bridge Rectifiers (THT & SMT) — one of TOPDIODE’s strongest product lines, with the MB10S, DB107S, DB157S, GBL207, KBP207, KBJ4M, GBU6M, KBPC2510, and 2W10 covering current ratings from 0.5A to tens of amperes.
• Small Signal Transistors — the BC807, BC817, BC847, BC857, and BC859 series in SOT-23 packages, among the most widely used transistors in global electronics manufacturing.

Why We Chose TOPDIODE: Key Advantages

Choosing the right manufacturing partner is never a decision we take lightly. Here’s what sets TOPDIODE apart and why we’re excited about this collaboration:

✅ Direct Manufacturer — No Middlemen

TOPDIODE designs and manufactures its components in-house. This means tighter quality control, batch-to-batch consistency, full traceability, and more competitive pricing — benefits that flow directly to our customers.

✅ Industry-Standard References for Easy Drop-In Replacement

Every component in the TOPDIODE lineup is based on globally recognized references. Cross-reference tables in PDF and Excel formats are available for seamless sourcing transitions — no redesign required.

✅ THT & SMT Availability Across the Range

Whether your production lines are traditional or modern, TOPDIODE covers both Through-Hole and Surface Mount formats, offering flexibility without the need for multiple suppliers.

✅ Industrial-Scale Production Capacity

With 6 billion units of annual production capacity, TOPDIODE can handle large volumes, tight deadlines, and demand peaks without compromising on lead times or quality.

✅ Internationally Certified Quality

TOPDIODE’s facilities are certified ISO 9001:2008 and ISO 14001:2004. All discrete semiconductors are RoHS 2.0 and REACH compliant, with certifications issued by independent bodies including SGS. A Conflict-Free Metals Declaration is also available for customers subject to supply chain transparency requirements.

✅ Comprehensive Technical Documentation

Datasheets, full product catalogs, cross-reference guides, package size references, and compliance declarations are all freely available for download — streamlining qualification, design-in, and procurement processes.

✅ Global Distribution Network

TOPDIODE is actively expanding its international distributor network, ensuring better local availability, shorter lead times, and dedicated commercial support for customers outside Asia.

What This Partnership Means for You

This partnership translates into real, tangible benefits for our customers:

Better pricing — by working directly with the manufacturer, we eliminate unnecessary markups and pass the savings on to you.

Broader availability — access to a wide and deep catalog of discrete semiconductors, all from a single, trusted source.

Regulatory peace of mind — all components come with the certifications and compliance declarations needed to meet your quality and regulatory requirements, without additional paperwork on your end.

Faster sourcing — standardized references, ready-to-use cross-reference tables, and a strong production capacity mean shorter cycles from order to delivery.

A reliable long-term partner — nearly 30 years of industrial experience, certified manufacturing processes, and a commitment to quality make TOPDIODE a partner built for the long haul.

Ready to Explore the TOPDIODE Range?

We invite you to discover the full TOPDIODE catalog and find out how these components can enhance your designs, simplify your supply chain, and strengthen your product quality.

Our team is available to help you identify the right references, navigate cross-reference options, and get you the technical documentation you need.