31712345 - Tunnel diodes

CPV code 31712345 in the EU Common Procurement Vocabulary refers to Tunnel diodes. It sits at level 6 of the CPV hierarchy as a subcategory within the 31 division. This code is nested directly under 31712300, narrowing the broader category into the specific area of tunnel diodes. As a leaf code, 31712345 has no further subdivisions and represents the most precise classification available in this branch — buyers should reference it directly in tender notices when the procurement primarily concerns tunnel diodes. Contracting authorities across the EU use 31712345 in TED notices and national procurement portals to signal that a tender relates to tunnel diodes.