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 3.50MM0 - Immediate$3.21View Details
CONN RCPT HSG 4POS 3.50MM1722563104CONN RCPT HSG 4POS 3.50MM9816 - Immediate$3.21View Details
CONN RCPT HSG 2POS 3.50MM1722564102CONN RCPT HSG 2POS 3.50MM2286 - Immediate$2.80View Details
CONN RCPT HSG 3POS 3.50MM1722563103CONN RCPT HSG 3POS 3.50MM11312 - Immediate
38500 - Factory Stock
$2.80View Details
CONN RCPT HSG 4POS 3.50MM1722584104CONN RCPT HSG 4POS 3.50MM402 - Immediate$2.63View Details
CONN RCPT HSG 4POS 3.50MM1722583104CONN RCPT HSG 4POS 3.50MM14395 - Immediate$3.05View Details
CONN RCPT HSG 4POS 3.50MM1722564104CONN RCPT HSG 4POS 3.50MM4419 - Immediate$3.21View Details
CONN RCPT HSG 6POS 3.50MM1722583106CONN RCPT HSG 6POS 3.50MM80 - Immediate$3.46View Details
CONN RCPT HSG 3POS 3.50MM1722564103CONN RCPT HSG 3POS 3.50MM4679 - Immediate$2.47View Details
CONN RCPT HSG 6POS 3.50MM1722563106CONN RCPT HSG 6POS 3.50MM4478 - Immediate$3.70View Details
CONN RCPT HSG 6POS 3.50MM1722584106CONN RCPT HSG 6POS 3.50MM6217 - Immediate$3.62View Details
CONN RCPT HSG 8POS 3.50MM1722583108CONN RCPT HSG 8POS 3.50MM23789 - Immediate$3.62View Details
CONN RCPT HSG 8POS 3.50MM1722563108CONN RCPT HSG 8POS 3.50MM6631 - Immediate$5.02View Details
CONN RCPT HSG 8POS 3.50MM1722584108CONN RCPT HSG 8POS 3.50MM3807 - Immediate$5.10View Details

PCB Headers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MM3168 - Immediate$6.26View Details
CONN HEADER VERT 4POS 3.5MM1722981104CONN HEADER VERT 4POS 3.5MM5029 - Immediate$7.24View Details
CONN HEADER VERT 2POS 3.5MM1722862102CONN HEADER VERT 2POS 3.5MM18672 - Immediate$4.94View Details
CONN HEADER VERT 6POS 3.5MM1722981106CONN HEADER VERT 6POS 3.5MM2930 - Immediate$9.06View Details
CONN HEADER VERT 2POS 3.5MM1722861302CONN HEADER VERT 2POS 3.5MM1020 - Immediate$17.62View Details
ULTRAFIT HDR RT 1R BLK NAIL 06 C1723103306ULTRAFIT HDR RT 1R BLK NAIL 06 C0 - Immediate$31.36View Details
CONN HEADER VERT 10POS 3.5MM1722991310CONN HEADER VERT 10POS 3.5MM4 - Immediate$44.70View Details
CONN HEADER VERT 3POS 3.5MM1722862103CONN HEADER VERT 3POS 3.5MM0 - Immediate$7.57View Details
CONN HEADER VERT 6POS 3.5MM1722861106CONN HEADER VERT 6POS 3.5MM1451 - Immediate$8.89View Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MM2675 - Immediate$10.70View Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MM1085 - Immediate$12.35View Details
CONN HEADER VERT 8POS 3.5MM1722992108CONN HEADER VERT 8POS 3.5MM1620 - Immediate$15.48View Details
CONN HEADER VERT 4POS 3.5MM1722991304CONN HEADER VERT 4POS 3.5MM728 - Immediate$17.37View Details
CONN HEADER VERT 12POS 3.5MM1722982112CONN HEADER VERT 12POS 3.5MM1100 - Immediate$14.74View Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537023ULTRA-FIT TANGLESS CRIMP TERMINA43146 - Immediate
70000 - Factory Stock
$2.06View Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537123ULTRA-FIT TANGLESS CRIMP TERMINA21456 - Immediate
35000 - Factory Stock
$2.06View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722536111CONN SOCKET 20-22AWG CRIMP GOLD29687 - Immediate$3.05View Details
CRIMP TERM ULTRA-FIT 16-18 30MI1722536012CRIMP TERM ULTRA-FIT 16-18 30MI35416 - Immediate$3.38View Details
CONN SOCKET 16-18AWG CRIMP GOLD1722536011CONN SOCKET 16-18AWG CRIMP GOLD30673 - Immediate
70000 - Factory Stock
$3.38View Details
CRIMP TERM ULTRA-FIT 20-22 30MI1722536112CRIMP TERM ULTRA-FIT 20-22 30MI25473 - Immediate$3.38View Details
ULTRA-FIT PLUG TML TIN 16-18AWG2169465013ULTRA-FIT PLUG TML TIN 16-18AWG0 - Immediate
21000 - Marketplace
$4.45View Details
ULTRA-FIT PLUG TML TIN 20-22AWG2169465113ULTRA-FIT PLUG TML TIN 20-22AWG20336 - Immediate$4.45View Details
ULTRA-FIT PLUG TML GOLD 15U 16-12169465011ULTRA-FIT PLUG TML GOLD 15U 16-10 - Immediate$4.61View Details
ULTRA-FIT PLUG TML GOLD 15U 20-22169465111ULTRA-FIT PLUG TML GOLD 15U 20-224869 - Immediate$7.00View Details
ULTRA-FIT PLUG TML GOLD 30U 20-22169465112ULTRA-FIT PLUG TML GOLD 30U 20-29221 - Immediate$8.81View Details
ULTRA-FIT PLUG TML GOLD 30U 16-12169465012ULTRA-FIT PLUG TML GOLD 30U 16-128025 - Immediate$7.24View Details

TPA Retainers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644002ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$1.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644003ULTRA-FIT TANGLESS TERMINAL POSI49 - Immediate$1.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643002ULTRA-FIT TANGLESS TERMINAL POSI15015 - Immediate$1.23View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644004ULTRA-FIT TANGLESS TERMINAL POSI10249 - Immediate$1.23View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643004ULTRA-FIT TANGLESS TERMINAL POSI584 - Immediate
6500 - Factory Stock
$1.23View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643003ULTRA-FIT TANGLESS TERMINAL POSI855 - Immediate$1.23View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643005ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$1.32View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644008ULTRA-FIT TANGLESS TERMINAL POSI1325 - Immediate
7000 - Factory Stock
$1.32View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643008ULTRA-FIT TANGLESS TERMINAL POSI3135 - Immediate$1.40View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644005ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.99View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644006ULTRA-FIT TANGLESS TERMINAL POSI20620 - Immediate
4500 - Factory Stock
$1.32View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644007ULTRA-FIT TANGLESS TERMINAL POSI5713 - Immediate$1.23View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643007ULTRA-FIT TANGLESS TERMINAL POSI24 - Immediate$1.40View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643006ULTRA-FIT TANGLESS TERMINAL POSI1401 - Immediate$1.48View Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
HAND TOOL FOR ULTRA-FIT2002184600HAND TOOL FOR ULTRA-FIT6 - Immediate
25 - Factory Stock
$4,151.48View Details
FINEADJUST APPLICATOR0639043300FINEADJUST APPLICATOR1 - Immediate$34,335.67View Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDE7 - Immediate
50 - Factory Stock
$3,646.04View Details
HAND TOOL ULTRA-FIT 20-22AWG2238630900HAND TOOL ULTRA-FIT 20-22AWG8 - Immediate
15 - Factory Stock
$3,625.29View Details
FINEADJUST APPLICATOR2037024300FINEADJUST APPLICATOR0 - Immediate$47,447.11View Details
FINEADJUST APPLICATOR2037024400FINEADJUST APPLICATOR0 - Immediate$48,606.83View Details

Jumper Wire/Pre-Crimps

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT F-S 300MM 16 AWG LEADS2174712124ULTRA-FIT F-S 300MM 16 AWG LEADS300 - Immediate$7.49View Details
ULTRA-FIT F-F 75MM 16 AWG LEADS2174701121ULTRA-FIT F-F 75MM 16 AWG LEADS915 - Immediate$7.49View Details
ULTRA-FIT F-S 75MM 18 AWG LEADS2174712111ULTRA-FIT F-S 75MM 18 AWG LEADS985 - Immediate$7.49View Details
ULTRA-FIT F-S 300MM 20 AWG LEADS2174711104ULTRA-FIT F-S 300MM 20 AWG LEADS974 - Immediate$7.49View Details
ULTRA-FIT F-S 225MM 20 AWG LEADS2174712203ULTRA-FIT F-S 225MM 20 AWG LEADS990 - Immediate$8.64View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174711205ULTRA-FIT F-S 450MM 20 AWG LEADS906 - Immediate$8.64View Details
ULTRA-FIT F-S 225MM 18 AWG LEADS2174711113ULTRA-FIT F-S 225MM 18 AWG LEADS950 - Immediate$7.49View Details
ULTRA-FIT F-S 300MM 20 AWG LEADS2174712204ULTRA-FIT F-S 300MM 20 AWG LEADS980 - Immediate$8.64View Details
ULTRA-FIT F-F 300MM 16 AWG LEADS2174702224ULTRA-FIT F-F 300MM 16 AWG LEADS784 - Immediate$8.64View Details
ULTRA-FIT F-S 450MM 16 AWG LEADS2174711125ULTRA-FIT F-S 450MM 16 AWG LEADS976 - Immediate$7.49View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174712105ULTRA-FIT F-S 450MM 20 AWG LEADS895 - Immediate$7.49View Details
ULTRA-FIT F-S 225MM 16 AWG LEADS2174712223ULTRA-FIT F-S 225MM 16 AWG LEADS1000 - Immediate$8.64View Details
ULTRA-FIT F-S 450MM 20 AWG LEADS2174712205ULTRA-FIT F-S 450MM 20 AWG LEADS984 - Immediate$7.49View Details
ULTRA-FIT F-S 300MM 16 AWG LEADS2174711224ULTRA-FIT F-S 300MM 16 AWG LEADS760 - Immediate$8.64View Details
Updated: 2023-02-20
Published: 2016-01-11