Wurth Elektronik SMD EMI Contact Fingers - WE-SECF Series. Wurth WE-SECF series contact fingers are composed of gold-plated copper-beryllium for enhanced wear and corrosion resistance and can be SMD assembled by means of a pick-and-place process. Suitable for automated placement Material: copper-beryllium (CuBe) gold-plated (Au) Different types and sizes available Corrossion-resistant Wear-resistant High temperatures and mechenical weight have no influence on the excellent connection properties Reliable solderability