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 3.50MM26556 - Immediate$3.60View Details
CONN RCPT HSG 4POS 3.50MM1722563104CONN RCPT HSG 4POS 3.50MM9395 - Immediate$3.60View Details
CONN RCPT HSG 2POS 3.50MM1722564102CONN RCPT HSG 2POS 3.50MM10282 - Immediate$3.41View Details
CONN RCPT HSG 3POS 3.50MM1722563103CONN RCPT HSG 3POS 3.50MM12244 - Immediate$3.14View Details
CONN RCPT HSG 4POS 3.50MM1722584104CONN RCPT HSG 4POS 3.50MM7501 - Immediate$4.06View Details
CONN RCPT HSG 4POS 3.50MM1722583104CONN RCPT HSG 4POS 3.50MM10225 - Immediate
16000 - Factory Stock
$3.41View Details
CONN RCPT HSG 4POS 3.50MM1722564104CONN RCPT HSG 4POS 3.50MM4171 - Immediate$3.97View Details
CONN RCPT HSG 6POS 3.50MM1722583106CONN RCPT HSG 6POS 3.50MM8314 - Immediate$4.24View Details
CONN RCPT HSG 3POS 3.50MM1722564103CONN RCPT HSG 3POS 3.50MM2337 - Immediate$2.77View Details
CONN RCPT HSG 6POS 3.50MM1722563106CONN RCPT HSG 6POS 3.50MM3290 - Immediate$4.15View Details
CONN RCPT HSG 6POS 3.50MM1722584106CONN RCPT HSG 6POS 3.50MM5432 - Immediate$4.06View Details
CONN RCPT HSG 8POS 3.50MM1722583108CONN RCPT HSG 8POS 3.50MM13959 - Immediate
4000 - Factory Stock
$4.06View Details
CONN RCPT HSG 8POS 3.50MM1722563108CONN RCPT HSG 8POS 3.50MM5980 - Immediate$5.63View Details
CONN RCPT HSG 8POS 3.50MM1722584108CONN RCPT HSG 8POS 3.50MM3567 - Immediate$5.72View Details

PCB Headers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MM7500 - Immediate$7.10View Details
CONN HEADER VERT 4POS 3.5MM1722981104CONN HEADER VERT 4POS 3.5MM4171 - Immediate$8.12View Details
CONN HEADER VERT 2POS 3.5MM1722862102CONN HEADER VERT 2POS 3.5MM14337 - Immediate$7.75View Details
CONN HEADER VERT 6POS 3.5MM1722981106CONN HEADER VERT 6POS 3.5MM4800 - Immediate$10.15View Details
CONN HEADER VERT 2POS 3.5MM1722861302CONN HEADER VERT 2POS 3.5MM913 - Immediate$20.58View Details
ULTRAFIT HDR RT 1R BLK NAIL 06 C1723103306ULTRAFIT HDR RT 1R BLK NAIL 06 C2304 - Immediate$38.48View Details
CONN HEADER VERT 10POS 3.5MM1722991310CONN HEADER VERT 10POS 3.5MM31 - Immediate
20250 - Factory Stock
$59.79View Details
CONN HEADER VERT 3POS 3.5MM1722862103CONN HEADER VERT 3POS 3.5MM306 - Immediate$8.49View Details
CONN HEADER VERT 6POS 3.5MM1722861106CONN HEADER VERT 6POS 3.5MM2028 - Immediate$9.97View Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MM1158 - Immediate$15.13View Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MM0 - Immediate$16.52View Details
CONN HEADER VERT 8POS 3.5MM1722992108CONN HEADER VERT 8POS 3.5MM1589 - Immediate$17.35View Details
CONN HEADER VERT 4POS 3.5MM1722991304CONN HEADER VERT 4POS 3.5MM2902 - Immediate$25.10View Details
CONN HEADER VERT 12POS 3.5MM1722982112CONN HEADER VERT 12POS 3.5MM184 - Immediate$16.52View Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537023ULTRA-FIT TANGLESS CRIMP TERMINA289407 - Immediate$2.31View Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537123ULTRA-FIT TANGLESS CRIMP TERMINA35785 - Immediate$2.31View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722536111CONN SOCKET 20-22AWG CRIMP GOLD70189 - Immediate$3.41View Details
CRIMP TERM ULTRA-FIT 16-18 30MI1722536012CRIMP TERM ULTRA-FIT 16-18 30MI41488 - Immediate$3.78View Details
CONN SOCKET 16-18AWG CRIMP GOLD1722536011CONN SOCKET 16-18AWG CRIMP GOLD105619 - Immediate
210000 - Factory Stock
$3.78View Details
CRIMP TERM ULTRA-FIT 20-22 30MI1722536112CRIMP TERM ULTRA-FIT 20-22 30MI49759 - Immediate$3.78View Details
ULTRA-FIT PLUG TML TIN 16-18AWG2169465013ULTRA-FIT PLUG TML TIN 16-18AWG0 - Immediate$4.98View Details
ULTRA-FIT PLUG TML TIN 20-22AWG2169465113ULTRA-FIT PLUG TML TIN 20-22AWG18672 - Immediate$4.98View Details
ULTRA-FIT PLUG TML GOLD 15U 16-12169465011ULTRA-FIT PLUG TML GOLD 15U 16-10 - Immediate$5.17View Details
ULTRA-FIT PLUG TML GOLD 15U 20-22169465111ULTRA-FIT PLUG TML GOLD 15U 20-224331 - Immediate$7.84View Details
ULTRA-FIT PLUG TML GOLD 30U 20-22169465112ULTRA-FIT PLUG TML GOLD 30U 20-270574 - Immediate$9.87View Details
ULTRA-FIT PLUG TML GOLD 30U 16-12169465012ULTRA-FIT PLUG TML GOLD 30U 16-117539 - Immediate$8.12View Details

TPA Retainers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644002ULTRA-FIT TANGLESS TERMINAL POSI14349 - Immediate
11000 - Factory Stock
$1.38View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644003ULTRA-FIT TANGLESS TERMINAL POSI10780 - Immediate$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643002ULTRA-FIT TANGLESS TERMINAL POSI13954 - Immediate
11000 - Factory Stock
$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644004ULTRA-FIT TANGLESS TERMINAL POSI5176 - Immediate$1.38View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643004ULTRA-FIT TANGLESS TERMINAL POSI3625 - Immediate$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643003ULTRA-FIT TANGLESS TERMINAL POSI3802 - Immediate$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643005ULTRA-FIT TANGLESS TERMINAL POSI4502 - Immediate$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644008ULTRA-FIT TANGLESS TERMINAL POSI4164 - Immediate$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643008ULTRA-FIT TANGLESS TERMINAL POSI373 - Immediate$1.57View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644005ULTRA-FIT TANGLESS TERMINAL POSI5389 - Immediate$1.38View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644006ULTRA-FIT TANGLESS TERMINAL POSI13166 - Immediate$1.48View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644007ULTRA-FIT TANGLESS TERMINAL POSI5663 - Immediate$1.38View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643007ULTRA-FIT TANGLESS TERMINAL POSI3335 - Immediate$1.66View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643006ULTRA-FIT TANGLESS TERMINAL POSI3573 - Immediate$1.66View Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
HAND TOOL FOR ULTRA-FIT2002184600HAND TOOL FOR ULTRA-FIT17 - Immediate$4,654.23View Details
FINEADJUST APPLICATOR0639043300FINEADJUST APPLICATOR1 - Immediate$38,485.40View Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDE5 - Immediate
50 - Factory Stock
$4,086.69View Details
HAND TOOL ULTRA-FIT 20-22AWG2238630900HAND TOOL ULTRA-FIT 20-22AWG12 - Immediate
50 - Factory Stock
$4,063.43View Details
FINEADJUST APPLICATOR2037024300FINEADJUST APPLICATOR0 - Immediate$53,181.45View Details
FINEADJUST APPLICATOR2037024400FINEADJUST APPLICATOR0 - Immediate$54,481.34View Details

Jumper Wire/Pre-Crimps

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT F-S 300MM 16 AWG LEADS2174712124ULTRA-FIT F-S 300MM 16 AWG LEADS345 - Immediate$8.40View Details
ULTRA-FIT F-F 75MM 16 AWG LEADS2174701121ULTRA-FIT F-F 75MM 16 AWG LEADS915 - Immediate$8.40View Details
ULTRA-FIT F-S 75MM 18 AWG LEADS2174712111ULTRA-FIT F-S 75MM 18 AWG LEADS985 - Immediate$8.40View Details
ULTRA-FIT F-S 300MM 20 AWG LEADS2174711104ULTRA-FIT F-S 300MM 20 AWG LEADS974 - Immediate$8.40View Details
ULTRA-FIT F-S 225MM 20 AWG LEADS2174712203ULTRA-FIT F-S 225MM 20 AWG LEADS990 - Immediate$9.69View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174711205ULTRA-FIT F-S 450MM 20 AWG LEADS766 - Immediate$9.69View Details
ULTRA-FIT F-S 225MM 18 AWG LEADS2174711113ULTRA-FIT F-S 225MM 18 AWG LEADS950 - Immediate$8.40View Details
ULTRA-FIT F-S 300MM 20 AWG LEADS2174712204ULTRA-FIT F-S 300MM 20 AWG LEADS980 - Immediate$9.69View Details
ULTRA-FIT F-F 300MM 16 AWG LEADS2174702224ULTRA-FIT F-F 300MM 16 AWG LEADS610 - Immediate$9.69View Details
ULTRA-FIT F-S 450MM 16 AWG LEADS2174711125ULTRA-FIT F-S 450MM 16 AWG LEADS971 - Immediate$8.40View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174712105ULTRA-FIT F-S 450MM 20 AWG LEADS825 - Immediate$8.40View Details
ULTRA-FIT F-S 225MM 16 AWG LEADS2174712223ULTRA-FIT F-S 225MM 16 AWG LEADS980 - Immediate$11.63View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174712205ULTRA-FIT F-S 450MM 20 AWG LEADS984 - Immediate$8.40View Details
ULTRA-FIT F-S 300MM 16 AWG LEADS2174711224ULTRA-FIT F-S 300MM 16 AWG LEADS630 - Immediate$9.69View Details
Updated: 2023-02-20
Published: 2016-01-11