Questions about RoHS come up every year, but the questions often go astray: some people want the certificate number, while others want the test report of the entire module. The actual caliber is the content control of restricted substances in homogeneous materials, and the declaration documents focus on the composition of the materials.
The limit value is calculated for homogeneous materials, not the entire product.
Common controlled substances include lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four phthalate plasticizers. Common limits are usually 0.1% and 0.01% for cadmium. The calculation objects are homogeneous materials that can be split, such as connector plastic shells, cable jackets, and solder layers, rather than the entire25G DAC high speed cableWeighing and converting as a whole is the reason why many buyers and suppliers are not on par with each other.
Four typical landing points for optical communication products
- Solder and terminal plating: lead content control under lead-free process, reflow soldering temperature curve changes accordingly
- Connector housings and tail boots: Restricted substances remaining in colorants and stabilizers
- Cable sheath: plasticizer selection, ophthalmic substances need to be confirmed in this part
- PCB base material and solder mask: the declaration data of the upstream plate factory is the main basis
How to write the declaration accompanying the goods so as not to be questioned repeatedly
A common practice in practice is for the manufacturer to issue a self-declaration based on the bill of materials and the declaration data of the upstream supplier, indicating the covered model range, effective date and basis. Passive equipment such asLC-LC single mode dual core jumperThey are also treated according to the same caliber; the specific limits are subject to the text of the current regulations. Buyers should check whether the model coverage corresponds to the batch, rather than finding an unverifiable number. EB-LINK should be shipped according to the order registration destination market requirements to avoid mixed versions.