The invention relates to an acidic electrolyte used for depositing tin-silver alloys. The acidic electrolyte comprises one or more alkylsulfonic acids and/or alkanolsulfonic acids, one or more soluble tin (II) salts, one or more soluble silver (I) salts and one or more organic sulfur compounds with one or more thioether functional units and/or ether functional units of the general formula R—Z—R—, wherein R and R are the same or different non-aromatic organic groups, and Z represents S or O. The invention further relates to a method using the electrolyte and to the coating obtainable by the inventive method as well as to the use of the electrolyte for coating electronic components.

 
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