When a client visits our factory and picks up a switch for the first time, they can usually tell the difference between a premium unit and a budget one just by feel. The weight, the snap of the rocker, the finish on the edge of the faceplate — these are all down to the materials used inside, where nobody looks.
Understanding what goes into a wall switch helps you evaluate product quality without relying entirely on brand claims.
Housing Materials: PC vs ABS vs Metal
- Polycarbonate (PC): This is the industry standard for premium switches. PC handles heat up to 125°C, stops burning quickly in case of a short (UL 94 V-0 rating), and resists yellowing over time. Most of our European standard and British standard switches use PC.
- ABS: Cheaper than PC, and you can feel it. ABS is impact-resistant but degrades under UV and has lower heat tolerance. Common in budget ranges where price is the main selling point.
- Stainless steel: Used for faceplates in commercial or high-end residential jobs. Corrosion-resistant and durable. Our S5.1 series is a good example.
- Tempered glass: Becoming popular in decorative switches — T2 series and U2 series use this. It looks modern but costs more and requires careful handling during installation.
Contacts and Conductors — Where Quality Really Lives
The internal contacts are the most critical part of any switch. They carry current and they take the mechanical wear every time someone flicks the switch.
- Phosphor bronze: Our standard for terminals and contacts. It conducts well, has good spring properties, and resists corrosion. We do not use plain brass for load-bearing contacts — it loses tension over time.
- Silver alloy: Used for the actual switching contacts. Silver-cadmium oxide (AgCdO) is traditional. Silver-tin oxide (AgSnO₂) is the newer, more environmentally friendly alternative. Both deliver reliable arc suppression over 20000-plus cycles.
- Brass: Fine for plug pins and earth contacts, but not for switching surfaces.
Flame Retardancy Matters More Than You Think
Electrical fires are rare but devastating. The international standard UL 94 rates materials on how quickly they stop burning after the ignition source is removed. V-0 is the highest practical rating — the material self-extinguishes within 10 seconds. All MORDIO switch housings meet V-0. Cheaper switches sometimes skip this, using unrated plastic that can propagate a fire.
What Material Choices Tell You about a Supplier
A manufacturer who uses PC housings, phosphor bronze terminals, and silver alloy contacts is not cutting corners. These materials cost more, but they directly translate into longer service life, better heat handling, and fewer returns. When evaluating an OEM supplier, ask for the material spec sheet and check those details.
If you want to see the material difference for yourself, request samples from us alongside samples from a budget supplier. Flick them side by side a few hundred times. The difference in feel and consistency is unmistakable.
