Ultra-Fit Power Connectors

Molex's Ultra-Fit series eliminates same-circuit-size cross mating, optimizes space savings, and reduces terminal back-out

Image of Molex's Ultra-Fit™ Power ConnectorsEach industry faces different power connector challenges. Failures can occur in appliances as a result of mis-mated connectors. Terminal back-out or other potential assembly errors can lead to dangerous brake malfunctions in vehicles. Pervasive data growth is driving PCB makers to use more electronics in smaller spaces; sourcing small yet power-dense electronics is a dilemma. Molex's Ultra-Fit power connectors address these issues, solving four key design challenges while offering the premium housing features of proven Mini-Fit and Micro-Fit 3.0 connector systems. Color-coded housings mitigate the risk of mis-mating. Optional TPA retainers significantly reduce terminal back-out. A streamlined design that is 17% smaller than competing power connectors provides space savings and an ultra-low mating force reduces operator fatigue when mating numerous high-circuit connectors.

Video: Ultra Fit Power Connectors

Features and Benefits

  • Multiple mechanical keying and color-coded options
    • Allow same-circuit, multiple connector use with virtually no chance of cross mating. Color coding provides visual indication of the proper mating connector enabling faster assembly
  • 17% reduction in pitch over similar power connectors
    • Current-dense design saves PCB space. Allows for smaller packaging without sacrificing current-carrying capabilities
  • Optional terminal position assurance (TPA) retainer
    • Guarantees the terminal is fully seated in the housing to reduce terminal back-out. Retains terminal if main retention feature fails
  • Ultra-low mating force terminal
    • Reduces operator fatigue and improves assembly compliance for high-circuit applications
  • Positive-lock housing with anti-snag design
    • Ensures mated connector assemblies will not accidentally disengage. Provides an audible click while mating. Protects latch from damage due to wire snags
  • Fully isolated terminals
    • Protect against potential damage of the header and receptacle terminals during handling and mating
  • Terminal interface with six independent points of contact (split-box terminal design)
    • Offers redundant, secondary current paths for long-term performance and reliability

Crimp Housings

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN RCPT HSG 2POS 3.50MM1722563102CONN RCPT HSG 2POS 3.50MM16293 - Immediate$0.72View Details
CONN RCPT HSG 4POS 3.50MM1722563104CONN RCPT HSG 4POS 3.50MM7288 - Immediate$0.74View Details
CONN RCPT HSG 2POS 3.50MM1722564102CONN RCPT HSG 2POS 3.50MM13577 - Immediate$0.69View Details
CONN RCPT HSG 3POS 3.50MM1722563103CONN RCPT HSG 3POS 3.50MM7392 - Immediate$0.63View Details
CONN RCPT HSG 4POS 3.50MM1722584104CONN RCPT HSG 4POS 3.50MM7249 - Immediate$0.79View Details
CONN RCPT HSG 4POS 3.50MM1722583104CONN RCPT HSG 4POS 3.50MM14294 - Immediate$0.69View Details
CONN RCPT HSG 4POS 3.50MM1722564104CONN RCPT HSG 4POS 3.50MM4141 - Immediate$0.79View Details
CONN RCPT HSG 6POS 3.50MM1722583106CONN RCPT HSG 6POS 3.50MM6406 - Immediate$0.85View Details
CONN RCPT HSG 3POS 3.50MM1722564103CONN RCPT HSG 3POS 3.50MM2233 - Immediate$0.69View Details
CONN RCPT HSG 6POS 3.50MM1722563106CONN RCPT HSG 6POS 3.50MM1578 - Immediate$0.83View Details
CONN RCPT HSG 6POS 3.50MM1722584106CONN RCPT HSG 6POS 3.50MM4099 - Immediate$0.87View Details
CONN RCPT HSG 8POS 3.50MM1722583108CONN RCPT HSG 8POS 3.50MM8330 - Immediate$1.05View Details
CONN RCPT HSG 8POS 3.50MM1722563108CONN RCPT HSG 8POS 3.50MM2374 - Immediate$1.12View Details
CONN RCPT HSG 8POS 3.50MM1722584108CONN RCPT HSG 8POS 3.50MM3517 - Immediate$1.19View Details

PCB Headers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MM9275 - Immediate$1.51View Details
CONN HEADER VERT 4POS 3.5MM1722981104CONN HEADER VERT 4POS 3.5MM3546 - Immediate$1.71View Details
CONN HEADER VERT 2POS 3.5MM1722862102CONN HEADER VERT 2POS 3.5MM9353 - Immediate$1.66View Details
CONN HEADER VERT 6POS 3.5MM1722981106CONN HEADER VERT 6POS 3.5MM3450 - Immediate$2.16View Details
CONN HEADER VERT 2POS 3.5MM1722861302CONN HEADER VERT 2POS 3.5MM882 - Immediate$4.47View Details
ULTRAFIT HDR RT 1R BLK NAIL 06 C1723103306ULTRAFIT HDR RT 1R BLK NAIL 06 C2227 - Immediate$7.66View Details
CONN HEADER VERT 10POS 3.5MM1722991310CONN HEADER VERT 10POS 3.5MM474 - Immediate$11.92View Details
CONN HEADER VERT 3POS 3.5MM1722862103CONN HEADER VERT 3POS 3.5MM0 - Immediate$1.80View Details
CONN HEADER VERT 6POS 3.5MM1722861106CONN HEADER VERT 6POS 3.5MM1508 - Immediate$2.13View Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MM735 - Immediate$3.01View Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MM625 - Immediate$3.30View Details
CONN HEADER VERT 8POS 3.5MM1722992108CONN HEADER VERT 8POS 3.5MM1582 - Immediate$3.68View Details
CONN HEADER VERT 4POS 3.5MM1722991304CONN HEADER VERT 4POS 3.5MM2330 - Immediate$4.99View Details
CONN HEADER VERT 12POS 3.5MM1722982112CONN HEADER VERT 12POS 3.5MM1382 - Immediate$4.24View Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537023ULTRA-FIT TANGLESS CRIMP TERMINA255773 - Immediate$0.45View Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537123ULTRA-FIT TANGLESS CRIMP TERMINA13190 - Immediate$0.50View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722536111CONN SOCKET 20-22AWG CRIMP GOLD146 - Immediate$0.67View Details
CRIMP TERM ULTRA-FIT 16-18 30MI1722536012CRIMP TERM ULTRA-FIT 16-18 30MI41229 - Immediate$0.74View Details
CONN SOCKET 16-18AWG CRIMP GOLD1722536011CONN SOCKET 16-18AWG CRIMP GOLD93613 - Immediate$0.74View Details
CRIMP TERM ULTRA-FIT 20-22 30MI1722536112CRIMP TERM ULTRA-FIT 20-22 30MI37279 - Immediate$0.74View Details
ULTRA-FIT PLUG TML TIN 16-18AWG2169465013ULTRA-FIT PLUG TML TIN 16-18AWG0 - Immediate
14000 - Marketplace
$0.97View Details
ULTRA-FIT PLUG TML TIN 20-22AWG2169465113ULTRA-FIT PLUG TML TIN 20-22AWG17397 - Immediate$0.97View Details
ULTRA-FIT PLUG TML GOLD 15U 16-12169465011ULTRA-FIT PLUG TML GOLD 15U 16-10 - Immediate$1.01View Details
ULTRA-FIT PLUG TML GOLD 15U 20-22169465111ULTRA-FIT PLUG TML GOLD 15U 20-224096 - Immediate$1.53View Details
ULTRA-FIT PLUG TML GOLD 30U 20-22169465112ULTRA-FIT PLUG TML GOLD 30U 20-267109 - Immediate$1.93View Details
ULTRA-FIT PLUG TML GOLD 30U 16-12169465012ULTRA-FIT PLUG TML GOLD 30U 16-116675 - Immediate$1.59View Details

TPA Retainers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644002ULTRA-FIT TANGLESS TERMINAL POSI9397 - Immediate$0.27View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644003ULTRA-FIT TANGLESS TERMINAL POSI303 - Immediate$0.29View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643002ULTRA-FIT TANGLESS TERMINAL POSI10898 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644004ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.29View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643004ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643003ULTRA-FIT TANGLESS TERMINAL POSI11234 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643005ULTRA-FIT TANGLESS TERMINAL POSI8288 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644008ULTRA-FIT TANGLESS TERMINAL POSI1745 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643008ULTRA-FIT TANGLESS TERMINAL POSI2713 - Immediate$0.34View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644005ULTRA-FIT TANGLESS TERMINAL POSI3217 - Immediate$0.29View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644006ULTRA-FIT TANGLESS TERMINAL POSI8622 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644007ULTRA-FIT TANGLESS TERMINAL POSI4838 - Immediate$0.31View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643007ULTRA-FIT TANGLESS TERMINAL POSI3325 - Immediate$0.34View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643006ULTRA-FIT TANGLESS TERMINAL POSI2357 - Immediate$0.32View Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
HAND TOOL FOR ULTRA-FIT2002184600HAND TOOL FOR ULTRA-FIT16 - Immediate$909.44View Details
FINEADJUST APPLICATOR0639043300FINEADJUST APPLICATOR0 - Immediate$7,520.10View Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDE4 - Immediate$1,005.60View Details
HAND TOOL ULTRA-FIT 20-22AWG2238630900HAND TOOL ULTRA-FIT 20-22AWG23 - Immediate$794.00View Details
FINEADJUST APPLICATOR2037024300FINEADJUST APPLICATOR0 - Immediate$10,391.74View Details
FINEADJUST APPLICATOR2037024400FINEADJUST APPLICATOR0 - Immediate$10,645.73View Details

Jumper Wire/Pre-Crimps

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT F-S 300MM 16 AWG LEADS2174712124ULTRA-FIT F-S 300MM 16 AWG LEADS631 - Immediate$2.22View Details
ULTRA-FIT F-F 75MM 16 AWG LEADS2174701121ULTRA-FIT F-F 75MM 16 AWG LEADS915 - Immediate$2.06View Details
ULTRA-FIT F-S 75MM 18 AWG LEADS2174712111ULTRA-FIT F-S 75MM 18 AWG LEADS985 - Immediate$1.95View Details
ULTRA-FIT F-S 300MM 20 AWG LEADS2174711104ULTRA-FIT F-S 300MM 20 AWG LEADS974 - Immediate$2.06View Details
ULTRA-FIT F-S 225MM 20 AWG LEADS2174712203ULTRA-FIT F-S 225MM 20 AWG LEADS980 - Immediate$2.27View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174711205ULTRA-FIT F-S 450MM 20 AWG LEADS766 - Immediate$2.38View Details
ULTRA-FIT F-S 225MM 18 AWG LEADS2174711113ULTRA-FIT F-S 225MM 18 AWG LEADS950 - Immediate$1.64View Details
ULTRA-FIT F-S 300MM 20 AWG LEADS2174712204ULTRA-FIT F-S 300MM 20 AWG LEADS980 - Immediate$2.38View Details
ULTRA-FIT F-F 300MM 16 AWG LEADS2174702224ULTRA-FIT F-F 300MM 16 AWG LEADS410 - Immediate$2.38View Details
ULTRA-FIT F-S 450MM 16 AWG LEADS2174711125ULTRA-FIT F-S 450MM 16 AWG LEADS971 - Immediate$2.06View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174712105ULTRA-FIT F-S 450MM 20 AWG LEADS775 - Immediate$2.06View Details
ULTRA-FIT F-S 225MM 16 AWG LEADS2174712223ULTRA-FIT F-S 225MM 16 AWG LEADS980 - Immediate$2.27View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174712205ULTRA-FIT F-S 450MM 20 AWG LEADS984 - Immediate$2.06View Details
ULTRA-FIT F-S 300MM 16 AWG LEADS2174711224ULTRA-FIT F-S 300MM 16 AWG LEADS630 - Immediate$2.38View Details
Updated: 2023-02-20
Published: 2016-01-11