First line: INDUSTRIAL CO., LTD. SURFACE MOUNT CHIP LAMPS 1.8mm Round Subminiature Chip Lamps Part Number: 42-21A/BHC-ZTW/1T Package outlines Re-flow ProfileAbstract: .. Part Number: 42-21A 42-21A /BHC-ZTW/1T. 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..