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
ULTRA-FIT PLUG SR NAT FH 7CKT2025694007ULTRA-FIT PLUG SR NAT FH 7CKT700 - Immediate$1.10View Details
ULTRA-FIT PLUG SR NAT PM 7CKT2025694107ULTRA-FIT PLUG SR NAT PM 7CKT600 - Immediate$1.15View Details
ULTRA-FIT PLUG DR NAT FH 8CKT2169454008ULTRA-FIT PLUG DR NAT FH 8CKT687 - Immediate$1.20View Details
ULTRA-FIT PLUG SR NAT PM 8CKT2025694108ULTRA-FIT PLUG SR NAT PM 8CKT500 - Immediate$1.28View Details
ULTRA-FIT PLUG DR NAT FH 10CKT2169454010ULTRA-FIT PLUG DR NAT FH 10CKT550 - Immediate$1.39View Details
ULTRA-FIT PLUG SR BLK FH 8CKT2025693008ULTRA-FIT PLUG SR BLK FH 8CKT600 - Immediate$1.40View Details
ULTRA-FIT PLUG DR NAT PM 10CKT2169454110ULTRA-FIT PLUG DR NAT PM 10CKT450 - Immediate$1.43View Details
ULTRA-FIT PLUG DR NAT FH 12CKT2169454012ULTRA-FIT PLUG DR NAT FH 12CKT496 - Immediate$1.60View Details
ULTRA-FIT PLUG DR NAT FH 14CKT2169454014ULTRA-FIT PLUG DR NAT FH 14CKT450 - Immediate$1.78View Details
ULTRA-FIT PLUG DR NAT PM 14CKT2169454114ULTRA-FIT PLUG DR NAT PM 14CKT340 - Immediate$1.87View Details
ULTRA-FIT PLUG SR NAT PM 3CKT2025694103ULTRA-FIT PLUG SR NAT PM 3CKT1000 - Immediate$0.82View Details
ULTRA-FIT PLUG SR NAT PM 4CKT2025694104ULTRA-FIT PLUG SR NAT PM 4CKT995 - Immediate$0.87View Details
ULTRA-FIT PLUG SR NAT FH 6CKT2025694006ULTRA-FIT PLUG SR NAT FH 6CKT796 - Immediate$0.98View Details
CONN RCPT HSG 4POS 3.50MM1722583104CONN RCPT HSG 4POS 3.50MM0 - Immediate
16000 - Factory Stock
$0.39View Details

PCB Headers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MM0 - Immediate$0.77View Details
CONN HEADER VERT 4POS 3.5MM1722981104CONN HEADER VERT 4POS 3.5MM0 - Immediate$0.88View Details
CONN HEADER VERT 2POS 3.5MM1722862102CONN HEADER VERT 2POS 3.5MM0 - Immediate$0.60View Details
CONN HEADER VERT 6POS 3.5MM1722981106CONN HEADER VERT 6POS 3.5MM0 - Immediate$1.10View Details
CONN HEADER VERT 2POS 3.5MM1722861302CONN HEADER VERT 2POS 3.5MM0 - Immediate$2.08View Details
ULTRAFIT HDR RT 1R BLK NAIL 06 C1723103306ULTRAFIT HDR RT 1R BLK NAIL 06 C0 - Immediate$3.81View Details
CONN HEADER VERT 10POS 3.5MM1722991310CONN HEADER VERT 10POS 3.5MM0 - Immediate$5.43View Details
CONN HEADER VERT 3POS 3.5MM1722862103CONN HEADER VERT 3POS 3.5MM0 - Immediate$0.92View Details
CONN HEADER VERT 6POS 3.5MM1722861106CONN HEADER VERT 6POS 3.5MM0 - Immediate$1.08View Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MM0 - Immediate$1.30View Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MM0 - Immediate
780 - Marketplace
$1.50View Details
CONN HEADER VERT 8POS 3.5MM1722992108CONN HEADER VERT 8POS 3.5MM0 - Immediate$1.88View Details
CONN HEADER VERT 4POS 3.5MM1722991304CONN HEADER VERT 4POS 3.5MM0 - Immediate$2.11View Details
CONN HEADER VERT 12POS 3.5MM1722982112CONN HEADER VERT 12POS 3.5MM0 - Immediate$1.79View Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537023ULTRA-FIT TANGLESS CRIMP TERMINA0 - Immediate
350000 - Factory Stock
$0.22View Details
ULTRA-FIT TANGLESS CRIMP TERMINA1722537123ULTRA-FIT TANGLESS CRIMP TERMINA0 - Immediate
105000 - Factory Stock
$0.30View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722536111CONN SOCKET 20-22AWG CRIMP GOLD0 - Immediate
105000 - Factory Stock
$0.31View Details
CRIMP TERM ULTRA-FIT 16-18 30MI1722536012CRIMP TERM ULTRA-FIT 16-18 30MI0 - Immediate
70000 - Factory Stock
$0.46View Details
CONN SOCKET 16-18AWG CRIMP GOLD1722536011CONN SOCKET 16-18AWG CRIMP GOLD0 - Immediate
280000 - Factory Stock
$0.37View Details
CRIMP TERM ULTRA-FIT 20-22 30MI1722536112CRIMP TERM ULTRA-FIT 20-22 30MI0 - Immediate$0.46View Details
ULTRA-FIT PLUG TML TIN 16-18AWG2169465013ULTRA-FIT PLUG TML TIN 16-18AWG0 - Immediate
21000 - Marketplace
$0.28View Details
ULTRA-FIT PLUG TML TIN 20-22AWG2169465113ULTRA-FIT PLUG TML TIN 20-22AWG13386 - Immediate$0.28View Details
ULTRA-FIT PLUG TML GOLD 15U 16-12169465011ULTRA-FIT PLUG TML GOLD 15U 16-10 - Immediate$0.44View Details
ULTRA-FIT PLUG TML GOLD 15U 20-22169465111ULTRA-FIT PLUG TML GOLD 15U 20-224466 - Immediate$0.45View Details
ULTRA-FIT PLUG TML GOLD 30U 20-22169465112ULTRA-FIT PLUG TML GOLD 30U 20-24156 - Immediate$1.14View Details
ULTRA-FIT PLUG TML GOLD 30U 16-12169465012ULTRA-FIT PLUG TML GOLD 30U 16-11425 - Immediate$1.14View Details

TPA Retainers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644002ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.17View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644004ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644005ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.19View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643002ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643003ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643004ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643005ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.16View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644003ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.14View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644008ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.21View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643008ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.17View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643006ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.18View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722643007ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.23View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644007ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.15View Details
ULTRA-FIT TANGLESS TERMINAL POSI1722644006ULTRA-FIT TANGLESS TERMINAL POSI0 - Immediate$0.16View Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
HAND TOOL ULTRA-FIT 20-22AWG2238630900HAND TOOL ULTRA-FIT 20-22AWG0 - Immediate$440.39View Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDE0 - Immediate
50 - Factory Stock
$442.91View Details
FINEADJUST APPLICATOR0639043300FINEADJUST APPLICATOR0 - ImmediateView Details for PricingView Details
FINEADJUST APPLICATOR2037024300FINEADJUST APPLICATOR0 - Immediate$6,807.51View Details
FINEADJUST APPLICATOR2037024400FINEADJUST APPLICATOR0 - Immediate$5,904.62View Details

Jumper Wire/Pre-Crimps

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
ULTRA-FIT F-F 225MM 16 AWG LEADS2174701223ULTRA-FIT F-F 225MM 16 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 75MM 20 AWG LEADS2174712201ULTRA-FIT F-S 75MM 20 AWG LEADS987 - Immediate$1.05View Details
ULTRA-FIT F-S 150MM 18 AWG LEADS2174712212ULTRA-FIT F-S 150MM 18 AWG LEADS960 - Immediate$1.05View Details
ULTRA-FIT F-F 75MM 16 AWG LEADS2174701221ULTRA-FIT F-F 75MM 16 AWG LEADS900 - Immediate$1.05View Details
ULTRA-FIT F-S 225MM 18 AWG LEADS2174712213ULTRA-FIT F-S 225MM 18 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 75MM 16 AWG LEADS2174712221ULTRA-FIT F-S 75MM 16 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 300MM 18 AWG LEADS2174711214ULTRA-FIT F-S 300MM 18 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 75MM 16 AWG LEADS2174711221ULTRA-FIT F-S 75MM 16 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 450MM 18 AWG LEADS2174712215ULTRA-FIT F-S 450MM 18 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 300MM 18 AWG LEADS2174712214ULTRA-FIT F-S 300MM 18 AWG LEADS1000 - Immediate$1.05View Details
ULTRA-FIT F-S 225MM 20 AWG LEADS2174712203ULTRA-FIT F-S 225MM 20 AWG LEADS990 - Immediate$1.05View Details
ULTRA-FIT F-S 75MM 20 AWG LEADS2174711201ULTRA-FIT F-S 75MM 20 AWG LEADS987 - Immediate$1.05View Details
ULTRA-FIT F-F 75MM 16 AWG LEADS2174702221ULTRA-FIT F-F 75MM 16 AWG LEADS780 - Immediate$1.05View Details
ULTRA-FIT F-S 150MM 18 AWG LEADS2174711212ULTRA-FIT F-S 150MM 18 AWG LEADS960 - Immediate$1.05View Details
Updated: 2023-02-20
Published: 2016-01-11