Panel builders don’t choose a switchgear supplier on price alone. A component that fails certification, arrives late, or doesn’t match spec can hold up an entire build — so the decision comes down to a few things that matter more than a catalog page ever can: consistency, documentation, and whether the supplier will still pick up the phone after the sale.
Every component Stefan manufactures — current transformers, relays, modular contactors and meters — is tested to IEC, DIN, IS and ANSI standards. For a panel builder, that’s not a marketing line, it’s the difference between a component that clears inspection the first time and one that gets flagged and sent back. Standards compliance is the baseline a specifier checks before a product is even considered.
Stefan’s components are manufactured in Spain, with the same tolerances and testing process applied across every batch. For a panel builder running the same design across multiple installations, that consistency matters as much as the individual spec sheet — a relay that behaves identically batch to batch means fewer surprises during assembly and testing.
Stefan supplies and supports panel builders and contractors directly, wherever they’re building. That means shorter lead times than sourcing through a multinational’s regional distributor chain, and a direct line to someone who understands the product — not a call center reading from a script.
If you’re specifying components for a low-voltage panel, the questions worth asking any supplier are the same ones Stefan is built to answer clearly: What standards is this tested to? Where is it manufactured? How fast can I get support if something doesn’t match spec on delivery?
Get in touch with Stefan’s team to request a datasheet or discuss your next project’s requirements.

Providing high-quality, reliable switchgear solutions with a commitment to excellence, safety, and customer satisfaction.