RCWL Thick Film SMT Wraparound Chip Resistors The Vishay / Dale RCWL Series Thick Film SMT Wraparound Chip Resistors offer low resistance values (0.1Ω to 0.91Ω) and are suitable for current sensing and shunts. Constructed of high quality ceramic with a metal glaze and a protective overglaze, the Vishay / Dale RCWL Series Thick Film SMT Wraparound Chip Resistors feature solder contacts on an Ni barrier layer. The RCWL series is RoHS compliant to directive 2002/95/EC and halogen-free according to IEC 61249-2-21.