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Diotec Semiconductor AG

Name: Diotec Semiconductor AG
Address: KreuzmattenStr. 4, Heitersheim, 79423, DE
Telephone: +49763452660
Price range: $

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Deutschland
Heitersheim
Diotec Semiconductor AG

Semiconductors made in Germany

03/09/2026

In 2015, an automotive concept car promised something that did not yet exist.

An 800 volt electrical system, at production scale, using components nobody had qualified to survive that voltage.

The industry had four years to change that. And it did.

At 800 volts, a component that fails can damage what sits behind it faster than a protection circuit can react.

Proving that will not happen, in the real world, takes years of qualification per part.

By the end of the decade, the first 800 volt production cars were on the road, resting on a supply chain that had done that work.

The 800 volt AI data centre architectures now rolling out through 2027 need the same kind of proven component reliability.

A discipline the automotive industry built years ago is now being borrowed by an industry that never had to build one.

Diotec makes automotive qualified discrete semiconductors, SiC MOSFETs and TVS diodes, in the space where that discipline was built.

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02/09/2026

We’ll be at , the accelerator for digital transformation and IT resilience! 🚀
Come and see us on 16 and 17 September at the Cité Internationale in Lyon with our partner ChipSelect!

📌 See you at stand E218
🚨 Your invitation 👉
https://app.media-k.it/r/uWO85iq8b9k

01/09/2026

"Which terminal was positive again?"

Every driver who has ever jump started a car, or watched a mechanic reinstall a battery, has felt that half second of doubt.

The switch guarding against that mistake is smaller than most people would guess.

The DI034N10PT-AQ measures 3 x 3 mm, roughly the size of a grain of rice, yet it is rated to carry more current than the dedicated circuit wired to power a UK home cooker.

Wired correctly, it carries the battery's current through that footprint with a smaller voltage drop than a standard rectifier diode would need to do the same job.

Wired backwards, a correctly designed protection circuit around it holds the current back before it reaches the module behind it.

Rated to 100 V, AEC-Q101 qualified, with an RDS(on) of 16 mΩ, in a PowerQFN 3 x 3 mm package built for exactly this kind of tight, high current automotive circuit.

That half second of doubt is human. The DI034N10PT-AQ is built so it never has to cost more than that.

27/08/2026

The I_FAV number on a rectifier datasheet is one of the least useful specs for comparison

Two rectifiers with the same I_FAV can carry very different currents in your actual design.

The number shifts based on how each manufacturer chose to test their part.
Change the reference temperature from ambient to lead and the curve looks better without touching the die.

Swap the substrate from standard FR4 to something more thermally optimised and the curve looks better again.

Cut the duty cycle from 100 percent to 50 percent and the number goes up one more time.

The physics of the die inside doesn't change with these choices.

The headline number on the datasheet does.

There is one spec that stays honest across manufacturers.

Forward voltage drop V_F is directly linked to the die size, so comparing V_F across two rectifiers tells you more about the actual silicon than comparing their I_FAV ratings.

Our PW4512 is a 45 A 1200 V standard recovery rectifier with a V_F under 1.1 V at that current.

Comparing that V_F to another manufacturer's 45 A rectifier tells you more about the two dies than comparing their headline current ratings ever will.

The number that tells you the most about the diode is often the one that gets looked at last.

25/08/2026

The diode you specified fits your circuit not your board layout

Most designs hit this at some point.

The electrically ideal part is too tall for the enclosure.

Its axial leads exit horizontally when your board needs vertical mounting.

Its lead spacing doesn't quite match the footprint the CAD library assumes.

The circuit is finished, the schematic is signed off, and now the mechanical layer of the design starts pushing back on the electrical one.

Most catalogue suppliers stop at this point.

Diotec doesn't.

Lead angles, lengths, formed shoulders for specific hole clearances, vertical mounting from a horizontal package: each is a mechanical customisation Diotec produces in-house, alongside chip design and packaging, across more than fifty years of building discrete semiconductors.

A qualification-critical part doesn't have to be sacrificed for a mechanical constraint.

The part is shaped to the board that already exists.

20/08/2026

Why do two devices with identical silicon behave differently in the same circuit?

The datasheet is only half the answer.

Once the same die sits in a different package, the circuit around it starts asking it different questions.

How much heat can spread into the copper before the junction temperature drifts upward.

How much of the gate driver's signal reaches the gate before parasitic inductance eats it.

How the part behaves over years of real thermal cycling.

Our DIF170SIC049 is a 1700V SiC MOSFET with a fourth pin a three-pin equivalent doesn't have.

The pin exists because the gate driver's return path, when it shares a connection with the load current, quietly loses part of the signal to parasitic inductance during fast switching.

Same silicon. Different package. Different behaviour.

The datasheet describes the part. The package decides what the part can actually do.

18/08/2026

The paper trail behind a qualified component matters more than the printing on it.

An AEC-Q101 label on a datasheet describes what the part was designed to meet.

Whether the part in your hand actually meets it depends on where it was made, how it was tested, and how many separate companies handled it between the wafer and the reel.

Every handoff between separate facilities is a point where a process detail can shift without anyone downstream immediately knowing.

Real qualification is a manufacturing chain, not a document at the end of one.

Diotec runs wafer production, chip testing, assembly, and packaging in-house, mostly using equipment developed within the company across more than fifty years of building discrete semiconductors.

That end-to-end control is what allows a qualification claim on a Diotec part to trace back through one continuous chain, not reconstructed across several companies' separate records.

Before trusting a label, it's worth asking what stands behind it.

13/08/2026

Four nanoseconds is the difference between a switching diode and a signal distortion.

The 1N4448HP is a small-signal switching diode built for a life most people wouldn't guess from its 1.0 mm × 0.65 mm SOD-882 case.

Its reverse recovery tme is under 4 nanoseconds.

Its junction capacitance is 3 pF at 0 V and 1 MHz.

Those two figures decide whether a diode can sit on a fast signal path without becoming the reason the signal falls apart.

At switching speeds where reverse recovery adds real charge back into the circuit, a slow diode distorts what passes through it.

At frequencies where junction capacitance loads the trace, a diode with too much of it starts filtering signals the rest of the circuit is trying to preserve.

The 1N4448HP was built to stay out of the way on both counts, in a package small enough to sit where board space is at its most expensive.

Its 100 V reverse voltage rating and AEC-Q101 qualified variant extend that same performance into automotive signal circuits.

The diode you place on a signal path shouldn't be the reason the signal changes shape.

Sometimes the smallest component is doing the most careful work.The strongest kind of protection is the one that's built into the shape of the thing itself.

11/08/2026

The best safeguards look like they aren't doing anything until you try to bypass them
A silkscreen arrow does something only if someone reads it.
A datasheet warning does something only if someone remembers it.
A keyed pin pattern does something whether anyone is paying attention or not.
Our GBI25J-LV uses four pins at asymmetric spacings: 10mm between the first two, then 7.5mm between the remaining three.
The pattern is designed to prevent wrong insertion during assembly, without anyone needing to notice the risk in the first place.
Every mistake caught before assembly costs less than one caught after.
The strongest kind of protection is the one that's built into the shape of the thing itself.

06/08/2026

One small diode in an air conditioner's control system does three separate jobs.

It protects sensitive circuitry, from reverse current at the back-up battery to reverse polarity elsewhere in the system.

It works as the output rectifier in the switching power supply, reducing losses in the process.

And it steers current surges to the supply rail, supporting the reliability and longevity of the whole control system.

All three functions live in a single SOD-523 package.

Our SDB0530WT is rated 500 mA, 30 V, with a forward voltage under 0.56 V at that current, and under 0.32 V at 1 mA.

A component asked to do three different jobs at different points in a circuit doesn't get three different parts.

It gets one part, chosen carefully enough to hold up in all three roles.

The quiet components in this system are doing more than one thing at once.

Adresse

KreuzmattenStr. 4
Heitersheim
79423

Öffnungszeiten

Montag	07:45 - 16:30
Dienstag	07:45 - 16:30
Mittwoch	07:45 - 16:30
Donnerstag	07:45 - 16:30
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+49763452660

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https://diotec.com/

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