Restriction of Hazardous
Substances Directive


Though often referred to as the lead-free directive, RoHS is not limited in scope to lead alone. RoHS also restricts the use of these six substances:

  • Lead (Pb)
  • Mercury (Hg)
  • Cadmium (Cd)
  • Hexavalent Chromium (Cr6+)
  • Polybrominated Biphenyls (PBB)
  • Polybrominated diphenyl ether (PBDE)

Sunstone has several RoHS-compliant products, to fit just about every project:

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Lead-Free PCB Material RoHS-compliant FR-4 RoHS-compliant FR-4 Many options
Surface Finishes  Immersion Silver Immersion Silver, ENIG Immersion Silver, ENIG, Hard gold, Lead Free Solder, and OSP
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RoHS does not require any specific product labeling. Many manufacturers have adopted their own compliance marks to reduce confusion.

Visual indicators in use include:

  • "RoHS compliant" labels
  • Green leaves
  • Check marks
  • "PB-Free"
  • WEEE trash-can logo with an "X" over the can
  • Lower case "e" within a circle with arrows (Chinese)

RoHS helps reduce damage to people and the environment in third-world countries where much of today's "high-tech trash" ends up. The use of lead-free solders and components has provided immediate health benefits to electronics industry workers in prototype and manufacturing operations. Solder paste no longer represents the same health risk it did before RoHS implementation.*