STMicroelectronics' stock here is discrete power semiconductors, split across two families: MDmesh/SuperMESH N-channel power MOSFETs and switching diodes. The MOSFETs cover a wide voltage-and-current spread — from 2.5 A at 800 V up to 17 A at 500 V — in TO-220, TO-247 and surface-mount TO-263 packages, the standard formats for power supplies, motor drives and switching converters. The switching diodes run a similar spread, from 2 A up to 60 A across TO-220, TO-247 and TO-252 packages, used for rectification and freewheeling duty in the same kind of power circuits.
A naming quirk worth knowing before you search: a portion of these switching diodes are tagged under our Isolator Switches category, which is built for electromechanical isolator switches — the overlap is a category-tagging artefact from the word "switching" in the product name, not a claim that these diodes function as isolators. If you're after an actual electrical isolator switch, that category's ABB stock is the genuine match; if you're after STMicroelectronics power semiconductors, this brand page is the more direct route regardless of which category a given listing sits under.
Package type and voltage/current rating are the two things to match exactly when replacing a failed component — TO-220 and TO-247 aren't interchangeable without a different PCB footprint, and derating margins on voltage and current should follow the original design rather than the part's absolute maximum rating. We are not STMicroelectronics, and not an authorised STMicroelectronics distributor — we source and supply genuine ST stock from our own inventory.
Frequently Asked Questions
Q: What's the difference between the MDmesh and SuperMESH MOSFET lines?
A: Both are STMicroelectronics' power MOSFET technology families optimised for low on-resistance at their rated voltage — check the specific part's datasheet for generation and exact electrical characteristics rather than assuming they're interchangeable by name alone.
Q: Why do some STMicroelectronics diodes appear under "Isolator Switches"?
A: That's a category-tagging artefact tied to the word "switching" in the product name, not a functional claim — these are power switching diodes, not isolation switches.
Q: Can I substitute a TO-220 part for a TO-247 part with the same electrical rating?
A: Not directly — the two packages have different pin spacing, thermal performance and PCB footprints, so a substitution needs a board redesign, not just a like-for-like swap.
