Diotec Semiconductor AG

Diotec Semiconductor AG Semiconductors made in Germany

Success in sport is not only measured by results, but also by the ability to learn, adapt, and come back stronger.At the...
03/06/2026

Success in sport is not only measured by results, but also by the ability to learn, adapt, and come back stronger.

At the Formula Kite World Championship in Portugal, Jan Matthis Vöster faced a challenging week that did not unfold as planned. Yet his reflections demonstrate the mindset that drives long-term success: taking responsibility, learning from setbacks, and staying focused on the next opportunity.

We are proud to support athletes who embody resilience, determination, and continuous improvement — values that resonate strongly with us at Diotec.

Thank you, Jan, for sharing your honest insights. We look forward to following your journey and cheering you on at the next race.

02/06/2026

Most PCB failures aren't caused by the big components.

The discretes. The passives.
The "we'll sort that in layout" components.

A missing pull-down resistor.
A base current that wasn't properly limited.
A transistor that stays partially on when it should be off and takes a relay with it.

The MMDTC143HP eliminates that risk before layout even starts.

Both bias resistors integrated - 4.7 kΩ input, 47 kΩ base-emitter - one package. 1.0 × 0.6 mm.

The circuit is stable by design, not by hope.

50 V. 100 mA. 0.38 mm tall.

One component replaces three.
Your first-time-right ratio just got a defensible argument.

At Diotec Semiconductor AG, we believe innovation thrives where passion meets hands-on engineering.That’s why we’re prou...
01/06/2026

At Diotec Semiconductor AG, we believe innovation thrives where passion meets hands-on engineering.

That’s why we’re proud to support the dedicated students of Racetech Racing Team TU Bergakademie Freiberg e.V. at Technische Universität Bergakademie Freiberg. We contribute selected semiconductor components to help powering their Formula Student race cars.

It’s always inspiring to see what talented young engineers can achieve with the right tools — and a lot of determination. The Racetech team continues to impress us with their technical excellence, creativity, and team spirit.

We’re glad to play a small part in their journey and look forward to seeing them on the track. 🏎️

Photo Credits: © Formula Student Germany - Andrae, Grobe

More awards? Absolutely — because great partnerships deserve the stage 🏆We are proud to present the Global Strategic Par...
29/05/2026

More awards? Absolutely — because great partnerships deserve the stage 🏆

We are proud to present the Global Strategic Partner Award to Arrow Central Europe GmbH in recognition of their outstanding collaboration, strategic commitment, and continued support as a valued partner of Diotec Semiconductor AG.

This award reflects the strength of a partnership built on trust, shared goals, and a long-term vision for delivering reliable semiconductor solutions to customers across global markets.

Through Arrow’s strong international presence, technical expertise, and customer-focused approach, our collaboration continues to create new opportunities and strengthen Diotec’s position worldwide.

We sincerely thank the entire Arrow team for their dedication, professionalism, and excellent cooperation throughout our journey together.

Congratulations to Arrow Central Europe on this well-deserved recognition — we look forward to continuing our successful partnership in the years ahead.

The thermal resistance in the datasheet is a measurement, not a property.RthJA tells you what junction temperature you'd...
28/05/2026

The thermal resistance in the datasheet is a measurement, not a property.

RthJA tells you what junction temperature you'd see if your PCB matched the JEDEC reference board. It usually doesn't.

JEDEC test boards have specified copper area, specified thickness, specified airflow, specified ambient. Your design has different copper area, different thermal vias, different adjacent components, different airflow, different ambient.

The RthJA on the datasheet isn't wrong. It just isn't yours.

This is why two engineers calculating the same junction temperature with the same part can get the same number and see different results in service.

The calculation says 95°C. The bench says 110°C.

Most of the gap is the PCB.

A part's RthJC is closer to a property of the package. It still depends on how it's measured, but it's less hostage to what's outside the part than RthJA. If you can measure case temperature in your actual design, you can work backward to a junction temperature grounded in your reality, not in JEDEC's.

This matters more in sealed enclosures, more in densely populated boards, more at higher ambient. It matters most where modern designs are heading.

The datasheet gives you a reference number. Your design gives you the answer.

27/05/2026

Only a few days to go until PCIM 2026 in Nuremberg!

From 9–11 June, Diotec Semiconductor AG will be exhibiting at one of the leading international events for power electronics, intelligent motion, renewable energy, and energy management.

📍 Visit us in Hall 9, Booth 434 to discuss the latest developments in semiconductor technology and power system design with our team.

We are also pleased to invite you to our Exhibitor Stage presentation by Senior Product Manager Udo Steinebrunner:
○ “AI and the Need for Super Efficient Data Server Power Supplies”
○ 10 June 2026
○ 12:30–12:50
○ Hall 4A, Stage 320

As AI-driven infrastructures continue to push the limits of power density and efficiency, the demand for highly optimised server power systems is becoming more critical than ever. Join us for insights into the semiconductor challenges and opportunities shaping next-generation data server architectures.

We look forward to meeting you in Nuremberg!

A server power supply runs 8,760 hours a year.The bridge rectifier on its input runs the same hours.𝗘𝘃𝗲𝗿𝘆 𝗵𝗮𝗹𝗳 𝗰𝘆𝗰𝗹𝗲, 𝘁𝘄...
27/05/2026

A server power supply runs 8,760 hours a year.

The bridge rectifier on its input runs the same hours.

𝗘𝘃𝗲𝗿𝘆 𝗵𝗮𝗹𝗳 𝗰𝘆𝗰𝗹𝗲, 𝘁𝘄𝗼 𝗱𝗶𝗼𝗱𝗲𝘀 𝗮𝗿𝗲 𝗰𝗼𝗻𝗱𝘂𝗰𝘁𝗶𝗻𝗴.
Every conduction, a forward voltage drop.
Every voltage drop, a watt that becomes heat.

𝗧𝗵𝗲 𝘄𝗮𝘁𝘁𝘀 𝗮𝗿𝗲 𝘀𝗺𝗮𝗹𝗹. 𝗧𝗵𝗲 𝗵𝗼𝘂𝗿𝘀 𝗮𝗿𝗲 𝗻𝗼𝘁.

Multiply that power by 8,760.
Multiply forward voltage drop by forward current.
Now multiply by the fleet of servers in the data centre.

The forward voltage drop on a standard bridge rectifier is the line item nobody escalates.

It sits below the threshold where anyone calls it efficiency loss.

Until you stack up the deployment and realise you have been paying for it continuously since installation.

𝗢𝘂𝗿 𝗚𝗕𝗜25𝗝-𝗟𝗩 𝗰𝘂𝘁𝘀 𝘁𝗵𝗲 𝗳𝗼𝗿𝘄𝗮𝗿𝗱 𝘃𝗼𝗹𝘁𝗮𝗴𝗲 𝗱𝗿𝗼𝗽 𝗼𝗻 𝗲𝗮𝗰𝗵 𝗱𝗶𝗼𝗱𝗲 𝗯𝘆 10%.

Two diodes conduct per half cycle, so the energy loss at the input bridge falls by 20%.

The substitution is footprint-compatible.

Same GBI single inline case.
Same 600 V repetitive peak reverse voltage.
Same 25 A rating at 80°C case temperature.

𝗡𝗼 𝗯𝗼𝗮𝗿𝗱 𝗿𝗲𝗱𝗲𝘀𝗶𝗴𝗻.

The bridge rectifier was always going to draw forward voltage drop.

The question is how much of it you wanted to keep paying for.

35 V or 100 V.Same load dump test. Two different alternator conditions.ISO 16750-2 calls them Test A and Test B.Alternat...
22/05/2026

35 V or 100 V.
Same load dump test. Two different alternator conditions.
ISO 16750-2 calls them Test A and Test B.

Alternators without clamp diodes: the unsuppressed transient. Peaks above 100 V, durations up to 400 ms.
Alternators with centralised clamping: the suppressed transient. Held down to around 35 V on a 12 V system.

Engineers usually design for one.

An ECU qualified to Test B has been protected against a 35 V transient. Deploy it in a vehicle whose alternator doesn't include centralised clamping, and your TVS is seeing energy it was never sized for.
It fails.

This is where fleet reality stops being abstract.
New-platform ECUs end up in older vehicles.
Aftermarket replacements run with whatever alternator happens to be in the bay.
Industrial vehicles span decades of alternator generations on one fleet.

Modern EVs need load dump suppressors. No alternator. Still a 12 V bus with the same standards.

If your design only has to pass Test B, the TVS can be smaller, cheaper, and lower-power.
If it has to survive Test A in service, that's a different part. A different cost. A different qualification scope.

The standard tells you what to test for. It doesn't tell you which alternator your customer is going to use.

Every relay drive starts from the same four-part schematic.A Darlington transistor.Two base resistors.A flyback diode.En...
19/05/2026

Every relay drive starts from the same four-part schematic.

A Darlington transistor.
Two base resistors.
A flyback diode.

Engineers vary the specifics - which Darlington, which diode, which resistor values - but the four-part pattern is where the design starts.

The discrete build earns its place.
It lets you tune each component to your specific coil, your specific switching speed, your specific thermal margin.

It also costs four solder joints, four BOM lines, and four chances for one of them to go end-of-life on a quiet Friday.

When a PCN lands without a drop-in replacement, the cascade is real.

New layout.
New package.
New gain spec.

Our BST62 puts the four-part pattern in a single SOT-89 - 110 V collector-emitter, 1 A collector current, 190 µA input driving a 150 mA relay coil.
The discrete build still wins when you need to characterise components independently.

For everything else, the four-part pattern can be one.

We are proud to present the Growth Champion of the Year Award to DigiKey Corporation in recognition of their outstanding...
18/05/2026

We are proud to present the Growth Champion of the Year Award to DigiKey Corporation in recognition of their outstanding performance, commitment, and continued support as a valued distribution partner of Diotec Semiconductor AG. 🏆

This award reflects not only impressive growth, but also the strength of a partnership built on trust, collaboration, and a shared dedication to delivering high-quality semiconductor solutions to customers worldwide.
Through DigiKey’s exceptional market reach, customer focus, and operational excellence, Diotec products are more accessible than ever to engineers, developers, and purchasing professionals across North America and beyond.

We sincerely thank the entire DigiKey team for their continued commitment and look forward to many more successful milestones together.
Congratulations to DigiKey on this well-deserved achievement!

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