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KK 254 Reflow Process Compatible (RPC) Connector System Ideal for use in industries such as automotive, medical and consumer, KK 254 Reflow Process Compatible (RPC) Connector System supports a lead-free solder process and delivers up to 4.0A and 250V per circuit in a 2.54mm pitch package Electronics manufacturers are being driven by consumers and environmental agencies to be environmentally conscious; one way to do so is to reduce the amount of lead in components whenever possible. Removing lead from the connector solder-paste process is one way to conform and adhere to RoHS initiatives. KK RPC connectors are lead-free and designed with high-temperature nylon that can withstand temperatures up to +260°C while maintaining the standard KK header footprint (lead-filled solder-paste-process connectors withstand only up to +235°C). 171856 Vertical Header 171857 Right-Angle Header Features and Benefits High-temperature nylon housing Withstands lead-free high-temperature solder processing up to +260°C. Does not require the drying needs of normal nylon Polarized friction-lock header Prevents mis-mating and ensures secure mating Standard KK header footprint design Allows for drop-in replacement on existing header applications. Mates with standard KK receptacles Matte-tin over nickel plating Inhibits tin whiskering PCB receptacles are available in standard KK connectors Ensures secure mating between headers and receptacles Tape-and-reel packaging with pick-and-place caps available Enables highly automated termination processing and accurate PCB placement KK 254 RPC Vertical and Right-Angle Headers with Friction Lock Applications Medical Consumer Patient monitoring Home appliances (Washer/dryer and Dishwashers) Portable diagnostics Home security Dental equipment HVAC Control Vehicle Control modules Office Scanner Lighting fixtures Stereos Display panels Data/Computing and Telecommunications/ Networking Scanners/multi-function machines Printers Workstations Car Console Dental Equipment KK 254 Reflow Process Compatible (RPC) Connector System Specifications REFERENCE INFORMATION Packaging: Bag; Bag, tape-and-reel UL File No.: E29179 CSA File No.: LR19980 Mates With: any KK 2.54mm housing or PCB receptacle Designed In: Millimeters RoHS: Yes Low Halogen: Yes Glow Wire Compliant: No ELECTRICAL Voltage (max.): 250V Current (max.): 4.0A Contact Resistance (max.): 10mΩ Dielectric Withstanding Voltage: 500V AC (RMS) Insulation Resistance (min.): 1000MΩ MECHANICAL Contact Insertion Force: 11.12N Contact Retention to Housing: 17.8N Mating Force: 7.8N per circuit Unmating Force: 2.3N per circuit Durability (min.): 25 cycles PHYSICAL Housing: High-temperature Nylon Contact: Brass Plating: C  ontact Area — Matte Tin (Sn) or Select Gold (Au) Solder Tail Area — Matte Tin (Sn) Underplating — Nickel (Ni) PCB Thickness: 1.60mm Operating Temperature: Brass: -40 to +80°C Phosphor Bronze: -40 to +105°C Ordering Information Reflow Process Compatible Connectors Series No. Vertical 171856 171856 Right-Angle 171857 171857 Circuits Pitch Plating Packagin 2 to 12 2.54mm Tin (Sn) 15 μm Gold (Au) Tape-and-Reel Standard PCB Headers Series No. 4030 4094 42375 42376 42377 43009 47053 7395 7478 42009 42225 42226 42227 42228 6373 6410 Pitch Application Friction Lock Tail Type Wire-to-Board, Board-to-Board, Signal No Straight Right-Angle Yes Wire-to-Board, Signal Vertical Right-Angle Kinked PCB Tail 2.54mm Orientation Straight Staggered No Straight Yes Vertical Right-Angle Vertical Right-Angle Vertical Right-Angle Vertical Standard PCB Receptacles Series No. 44812 4455 Pitch Application 2.54mm Board-to-Board Configurations Top Entry, Through Hole Top Entry, Through Hole, Right-Angle Standard Crimp Terminals Series No. 2759 4809 6459 8088 41572 Pitch Application Base Material Brass 2.54mm Signal Phosphor Bronze Standard Crimp Housings Series No. 6471 2695 7880 47054 Pitch Application 2.54mm Wire-to-Board, Signal Friction Lock Yes No Yes www.molex.com/link/kk254.html Molex is a registered trademark of Molex, LLC in the United States of America and may be registered in other countries; all other trademarks listed herein belong to their respective owners. Order No. 987650-9112 Rev. 2 USA/0k/KC/2017.09 ©2017 Molex