Information: Underwriters Laboratories Inc. (UL) only gives approvals for modules and circuits. If a circuit has an approval it is UL recognized which you can find under a certain file No. Another possibility is that materials are listed and classified by UL. These materials can be found also under certain file Nos, where you can see for example the classification for flammability etc.
Diodes are not approved by UL, while bridge rectifiers - as a Graetz circuit - can be UL recognized. Most of the Diotec bridge rectifiers are UL recognized. You can find them under File No. E175067 (PDF)
Diotec products that are not UL recognized are produced with materials that are UL listed and classified. We use molding and casting compounds having for such materials the most severe flammability classification UL94V-0:
For components with molding compound MG21F-02 (standard) see File No. E255557 (PDF)
For components with molding compound EME-120G (halogen free) see File No. E59481 (PDF)
For components with casting compound - Araldit CW 1195 BD / Härter HW 1196 - see File No. 72789.