If intended for use in reflow oven, it is recommended that these components are heat treated at +125°C for 48 hours prior to such use. Phoenix Contact COMBICON MKDS 5.0mm High Temperature PCB Terminal Blocks. High temperature COMBICON MKD S terminal blocks enable a greater proportion of a PCB to be populated and reflow soldered in one operation. The through-hole fixing offers high mechanical stability. Features and Benefits. Screw connection Small, compact design Latching on side of terminal enables various numbers of positions to be combined Standard height (MKDS) and low profile (MKDSN) variants available