ON Semiconductor Components in South Africa

ON Semiconductor (now trading as onsemi) builds the power and sensing silicon behind a large share of modern industrial and automotive design. The company is strongest in two areas South African engineers reach for often. The first is power management, where its MOSFETs, IGBTs, rectifiers and EliteSiC silicon carbide devices handle motor drives, power supplies and solar inverters. The second is image sensing, where its sensors run machine vision and driver-assistance systems.

TRX Electronics supplies genuine onsemi parts to engineers and procurement teams across South Africa. We order through authorised channels, and our partnerships with TTI and Mouser give us access to the full onsemi catalogue, so you get the real device with proper traceability whether you need ten units for a prototype or a production reel.

What onsemi makes

Most onsemi demand we see locally sits in power electronics. The discrete MOSFETs and IGBTs, bridge rectifiers and the EliteSiC silicon carbide line are common choices for power supplies, motor control and renewable energy hardware. There is also a deep catalogue of analog and logic parts, including gate drivers, voltage regulators and signal-conditioning ICs, plus the image sensors that came in with the Aptina and Truesense acquisitions. If you have worked with Fairchild parts, those belong to onsemi now too, so a lot of long-standing designs still point at this brand.

For background on where these devices fit, our guides on power semiconductors for industrial extremes and silicon carbide and gallium nitride are a good starting point. You can also browse the wider semiconductor range.

Sourcing onsemi through TRX

Buying power semiconductors in South Africa usually comes down to two problems: lead time and authenticity. Counterfeit power devices are a real risk when parts move through grey channels, and a fake MOSFET in a motor drive is an expensive failure. TRX avoids that by ordering only through TTI and Mouser, both authorised onsemi distributors.

We hold no minimum order quantity, so prototype runs are welcome. In-stock orders are dispatched quickly and reach the main centres (Johannesburg, Cape Town, Durban and Pretoria) within a few business days by courier. If a part is not on the shelf, we quote it against the authorised channel and give you a realistic delivery date rather than a guess.

Common questions

Does TRX stock onsemi power devices?

Yes. We supply onsemi MOSFETs, IGBTs, rectifiers, silicon carbide devices and power management ICs through authorised distribution. Send us the part number and quantity and we will check current availability.

Are Fairchild parts still available?

They are. onsemi acquired Fairchild in 2016, and those product lines are still made and supported under the onsemi name. If your design references an older Fairchild part number, we can usually still source it.

Can I order small quantities for a prototype?

Yes. There is no minimum order quantity, so you can order a handful of parts to evaluate and scale up to production volumes later.

Get a quote

Need an onsemi part sourced for a current project? Contact the TRX team with your part numbers and we will come back with availability and lead time.

Related reading: power semiconductors built for industrial extremes, how gallium nitride is changing power design, and the future of rectifier and diode modules.