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Highlights in the Selection Guide "Diodes & Rectifiers"

selection guide diodes and rectifiers

Convenient - From now on we show AEC-Q101 qualified components in bold and thus replace the previous AEC-Q101 Guides. This way, you can find the corresponding components without having to look them up again.

At a glance - The last two pages show the detailed package dimensions. This allows a direct comparison of the different sizes.

SM3000, SM4000: HV diodes with 1 A and 3000/4000 V in the SMD design DO-213AB/Melf. Ideally suited as input rectifiers for electronic electricity meters, LED street lamps and 5G base stations.

BYG10Y: a 1.5 A / 1600 V diode with avalanche characteristics in SMD package SMA.

An AEC-Q101 qualified version is in release.

SI20C120D2, SICW20C120, SICW40C120: our first silicon carbide semiconductors! With 20 A and 1200 V in D²PAK and 2x 10 A / 2x 20 A and 1200 V in TO-247.

ESW6004, ESW6006: Superfast rectifiers with 60 A and 400 V / 600 V in TO-247. Fast switching with less than 35 and 60 ns respectively.

The printed version "Diodes & Rectifiers" can be ordered by quoting part no. 3215.1 from orderconfirmation@diotec.com.

Highlights in Our New Selection Guide "Transistors & Regulators“

selection guide transistors and regulators

Again, all AEC-Q101 qualified devices are in bold and package dimensions can be found on the last two pages for direct comparison.

DIJ2A3N65, DIJ4A5N65: 650 V MOSFETs with 2.3A and 4.5 A in isolated ITO-220AB package. Ideal for flyback converters and power factor correction.

DI280N10TL: 280 A and 100 V true power MOSFET in TOLL package. For power tools, DC-DC converters and DC drives.

DI7A6N04SQ2: Dual MOSFET with 2x 7.6 A and 40 V in SO-8 package. Space-saving solution for synchronous rectifiers.

LDI9332-ADEN: Adjustable LDO voltage regulator with enable function. Extends standby time of battery powered products.

The printed version "Transistors & Regulators" can be ordered by quoting part no. 3215.2 from orderconfirmation@diotec.com.

What Diotec has to do with cheerful coloured eggs

bipolar transistor MMDT2227 for cheerful colored eggs

Perhaps you have already asked yourself why eggs are painted at Easter time? There are several assumptions about this: The egg as a symbol of fertility and new life, which finds its beginning behind the shell, is widely known in many cultures.

In ancient Greece and Rome, colorful eggs were already hung to celebrate the equinox.
A chick just hatching from the egg is seen in Christianity as a reminder of Jesus' resurrection on Easter Sunday.

People in the Middle Ages kept a fasting period from Ash Wednesday to around Good Friday. The eggs laid by the hens during the last week of Lent were boiled to extend their shelf life. To avoid confusion with fresh eggs, the older eggs were simply dyed red. These "Holy Week eggs" were considered especially sacred. Nowadays, children are delighted when they notice coloured eggs right away during their search thanks to the colorful shells.

Modern machines can quickly dye eggs in large quantities. Using a gripper arm, the still hot eggs are placed either on paint rolls or are multiple colored by dispensers and airbrushes. Our component MMDT2227 contains two complementary bipolar transistors in a single package, for the control of small DC motors and electric valves. Ideally suited for egg painting machines and automatic packing lines – Easter can come!

Diotec Semiconductor AG Celebrates 50-Year Anniversary

Diotec Semiconductor AG Celebrates 50-Year Anniversary
  • Founded Februar 22, 1973 in Heitersheim
  • Employs 300 world-wide
  • A leading manufacturer of discrete semiconductor devices
  • Headquarters in Heitersheim, Germany

In February 1973, three young engineers came up with the idea of a company/partnership that would produce and distribute electronic components. Paul Bauer, Ulrich Geisler, and Bernd Kelpe laid the cornerstone for what was to become Diotec Semiconductor AG. The company’s first production facility was a former printing house in the little town of Heitersheim in the very South-West of Germany. Fifty years later, Diotec has expanded well beyond its humble roots, employing 300 world-wide, boasting branches in Slovenia, India, and China, and a global distribution network with sales offices in Europe, Asia, and North America.

Diotec began in the seventies by focusing on the production of bridge rectifiers for its primary client ITT, with whom it had a special relationship, since many Diotec employees got their start in the industry there. The company hit a milestone in 1989 with the introduction of passivated rectifier chips, a revolutionary method that made it possible to conduct measurements directly on the non-planar chip, and thus to determine the quality of a chip before assembly. By the end of 1996, Heitersheim’s ChipFab was already using plasma technology, an ecological method that has all but eliminated chemical waste. This quick adoption of plasma technology, which had only been developed months before, has afforded Diotec a preeminant position internationally. Board chair Brigitte Kelpe refers to ecological production and sustainable working as "core values that we adhere to everywhere we are present."

From 2009 to 2011 Diotec was the market leader in Europe with its axial Schottky bypass diodes for solar modules. "We were at the right place at the right time," according to Dr. Saverio Barboni, chief marketing and sales officer. "The Trend toward solar modules had its start in Germany. Research conducted by the Fraunhofer Institute for Solar Energy Systems in Freiburg played a crucial role here. The solar market required something most companies lacked: particular bypass diodes for the PV-modules. We responded by developing an optimized technology specifically for the solar market, and soon became the market leader in this area. The flexibility that allows us to respond to customer needs and changing market conditions, combined with rapid delivery times, defines us today and sets us apart from the competition."

Since 2003 the management board consisting of Brigitte Kelpe, Dr. Saverio Barboni, and Jürgen Lämmlin has been at the helm of the company. They cite three innovations that account for the Diotec's resilience: its development of a measurement electronics that is at work in more than 100 of its worldwide systems for testing semiconductor components, an ERP software that allows all Diotec branches to be logistically coordinated, and the equipment it produces on site.

Today Diotec's line of products includes discrete semiconductors in industry-standard packages suitable for a wide variety of circuits in industrial, energy, mobility, lighting, and consumer applications. Exciting new developments help customers save space, cost, and raw materials. The SM4000, for example, is a new 4000 volt rectifier diode in an SMD package that is ideally suited for the input rectification of devices directly connected to the utility grid. These might include intelligent smart meters, LED street lights, and 4G/5G base stations, all of which need to be designed for high surge immunity that exceeds the capacity of most available components today. "We developed the SM4000 precisely to close this gap", says Udo Steinebrunner, product manager at Diotec. "The SM4000 further illustrates how flexibly we can react to the market."

The 50-year-anniversary will be marked by celebrations throughout the year, the kick-off being a reception in April at the new production site in Heitersheim's Tiergarten Strasse 15. Festivities for employees in all four locations will follow in the summer, as well as a distributors' meeting in fall.

When You Are Looking for Adventures – Good to Have Tiny Friends

bipolar transistor BC847BP for toy robots and more

Seeing the world through children's eyes is something most adults can't. For kids, everything is an adventure; the world is full of magic things and everything could be a friend. No matter if the neighbour's dog, a plush bunny, or even a cute toy robot: The open mind and limitless imagination of the little ones enable them to travel around the space or discover fabulous creatures in the forest together with their tiny sidekicks.

When it comes to electronic components used in toys, most severe restrictions about hazardous substances must be followed. Our bipolar transistor BC847BP in DFN1006-3 package fulfils this requirement (as per today; please note our disclaimer). It comes in a very small package and is suitable for many kinds of electronic control purposes in toy robots.

Industrial Robots with our DBI25-18A – For High-quality products

three phase bridge DBI25-18A for industrial robots

Industrial robots normally are equipped with an arm, a robot gripper, many sensors and a control unit. There are several types of such robots, e. g. articulated robots mainly used in the automotive sector or for the production of PV systems, and ideally suited for the milling of softer synthetic materials or spot welding. Dual arm robots are particularly appropriate for carton erection in the packaging industry.

With our three phase bridge DBI25-18A, industrial robots can be reliably supplied with energy. It allows for up to 25 A output current at 115°C case temperature, can be soldered to the PCB and screwed to a heatsink and supports by its admissible reverse voltage of 1 800 V to fulfil the requirements of IEC 6100-4-5. An important contribution for undisturbed processing of products, systems and machines.

Solar Panels on Diotec's German Facilities – Green Energy Supported by Our SBX2540-3G Solar Bypass Diode

Did you know? All three facilities of Diotec headquarters in Germany are covered with photovoltaic modules, supplying a significant amount of "green" energy to our wafer, chip and device production. The worldwide Diotec plants will be equipped with PV panels within this year, the year of our 50th anniversary.

But do these PV panels work in winter as well? Yes, they do, and surprisingly often with higher energy output. The efficiency of PV panels is higher at low temperatures. So even when there is less sunlight during the day, it may happen that on sunny winter days more electricity is produced than on hot summer days. Not only heat can impact negatively on the performance of the panels. Also the sky is dustier and humid compared to a cold, fully bright winter day.

A disadvantage in winter is the higher risk for partial shading, due to the lower altitude of the sun, but also snow covering. It can lead to hotspots and thus damage on the modules. For that purpose every PV module is equipped with protective bypass diodes. They need to offer low forward voltage drop in bypass mode, and low reverse leakage in normal mode of operation. The SBX2540-3G combines both in an ideal way and is the perfect solar bypass diode. A great support of the green production of new semiconductor devices!

Dual Power with MOSFETS from Diotec – A Mobile Weather Station for Domestic Use

MMFTP3401 for Mobile Weather Stations

No matter if you want to make a bike tour, walk in the snow, make an excursion in the mountains, or if you prefer to go the cinema: Mobile weather stations are well suited for the planning of the weekend.
Get at-a-glance information about how the weather will be from the small and handy display.

Besides current weather data, these devices also show weather forecasts – but it remains to be seen if these events occur. Many of such weatherstations are suitable for dual power operation – from integrated battery or offline power supply. At this point, our MOSFET MMFTP3401 comes into play. This product is ideally suited as switch for such dual power devices. Due to the low R_DSon and low leakage current, this part provides extended hours of operation – especially in battery mode. The MMFTP3401 comes in the SOT-23 outline and allows up to-4A drain current at an R_DSon less than 65 mΩ. The parts are well suited up to -30 V and can be controlled via logic level – this is a great advantage for these applications.

You are looking for other kinds of MOSFETS? No problem, we provide an overview with parametric search on our website and also an easy-to-use cross reference tool: Simply type in a random competitor part in the searchfield  and you will receive our substitutes.

Weather Stations – Why are they so important?

KBP210G for the Power Supply of Weather Station

“Weather” is another word for meteorology - translated literally this means measuring the meteorological state of the atmosphere. This might be anything: Outdoor and indoor climate, weather forecast but also environmental impact.
A weather station measures all these elements and displays the data on a screen.
At airports, this system plays an important role because a flight might be postponed due to an imminent thunderstorm and air traffic controllers are able to plan routes.

In the mountains, for example on the Feldberg in the black forest (1493 m amsl), such station is also of great importance. To predict the weather as accurately as possible for winter sports enthusiasts, and to inform the visitors and residents about dangerous snowstorms just in time, weather stations are indispensable.

Our bridge rectifier KBP210G is a device which can be used in the power supply for such remote stations. A small wind turbine creates AC power, which such rectifier turns into DC. That is then regulated by a charging electronic and stored in a battery. Thanks to the high surge current and reverse voltage rating of the KBP210G, this system works even at stormy weather and thus unstable AC supply from the wind turbine. Therefore, the weatherstation can provide valuable information reliably and permanently.

Snowmobiles – For Work and Fun

BYG10J-AQ for Snowmobiles

In winter, when much snow falls, skiing and snowboarding is for active people a great way to enjoy themselves. With a snowmobile you can easily explore the gorgeous winter landscape. Additionally, these motorized vehicles are a good tool for forestry workers and last but not least, a great way to transport injured people in skiing areas.

Snowmobiles are well suited to move forward very fast on unprepared slopes and normally equipped with automatic transmission and throttle heating. Their engine power ranges from 41 PS to 299 PS. Additionally, they have an empty weight of more than 200 kg.

Diotec's BYG10J-AQ is a controlled avalanche rectifier with full AEC-Q101 qualification, ideally suited for engine control units (ECU) of snowmobiles and similar. The part offers 10 mJ of single pulse energy rating at breakdown > 650 V, 1.5 A of forward current and 27/30 A of surge current rating. As such they support reliable function of the ECU under all circumstances, especially when time counts – such as when injured people need to be rescued from the slopes.

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