First line: 1.8mm Round Subminiature Chip Lamps Part Number: 42-21UYC/S530-A4 Package outlines Re-flow ProfileAbstract: .. Part Number: 42-21UYC 42-21UYC /S530-A4 S530-A4 . Package outlines & Re-flow Profile. ÑSoldering iron Basic spec is U 5sec when 260 °C. If temperature is higher, time should be shorter +10 °C∆ -1sec .Power dissipation .. Tags: datasheet abstract..