With a lead content of less than 0.1%, Würth Elektronik's SMD spacers comply with RoHS regulations (2011/65/EU and 2015/863/EU). To meet customer quality requirements, these lead-free SMD spacers have been extensively tested and certified. They can also be easily used with lead-free solder pastes. Thanks to these new SMD spacers with a lead content of less than 0.1%, electronics manufacturers can have greater confidence in their planning, as the electronic modules in which they are used can be planned and designed with future-proof assurance.
The use of lead-free components eliminates the need for complex redesigns, new approvals or certifications, as well as the risks of regulatory non-compliance. More options for SMD mounting systems. There are also new developments for SMD mounting systems. Until now, there was only one version for mounting in the form of a polyamide sheet with a tab (abbreviation R), and now two additional variants have been introduced: "RR" and "RX". The circular "RR" version addresses a specific requirement. In situations where the optical inspection of small components could be hindered, the tab that facilitates removing the sheet is omitted.
With the "RX" variant, Würth Elektronik takes a different approach to mass production. Designed for high-volume manufacturing, the "RX" SMD spacers eliminate the need for foil: special nozzles in automated assembly systems can easily handle this SMD spacer variant and position it precisely on the printed circuit board. No waste is generated, and there's no need for laborious foil removal.
SMD standoffs not only enable multi-layer board designs but are also used for mounting sensors, LEDs, or displays. They can also be used to secure printed circuit boards to their housings and as supports on large boards or boards subjected to high mechanical stress. Thanks to their tin finish, SMD standoffs withstand multiple soldering processes without surface damage (no discoloration, bubbles, or cracks). The optimal combination of solder pad geometry, solder paste, and tin thickness of the surface alloy results in secure mechanical connections with high clamping forces and torques.
