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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 NumberDescriptionNumber of PositionsAvailable Quantity
CONN RCPT HSG 2POS 3.50MM1722561002CONN RCPT HSG 2POS 3.50MM29493 - ImmediateView Details
CONN RCPT HSG 3POS 3.50MM1722561003CONN RCPT HSG 3POS 3.50MM30View Details
CONN RCPT HSG 4POS 3.50MM1722561004CONN RCPT HSG 4POS 3.50MM46559 - ImmediateView Details
CONN RCPT HSG 6POS 3.50MM1722561006CONN RCPT HSG 6POS 3.50MM60View Details
CONN RCPT HSG 4POS 3.50MM1722581004CONN RCPT HSG 4POS 3.50MM40View Details

PCB Headers

ImageManufacturer Part NumberDescriptionPitch - MatingAvailable Quantity
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MM0.138" (3.50mm)13380 - Immediate
4900 - Factory Stock
View Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MM0.138" (3.50mm)385 - ImmediateView Details
CONN HEADER VERT 3POS 3.5MM1722861103CONN HEADER VERT 3POS 3.5MM0.138" (3.50mm)2728 - ImmediateView Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MM0.138" (3.50mm)2466 - ImmediateView Details
CONN HEADER VERT 4POS 3.5MM1722861104CONN HEADER VERT 4POS 3.5MM0.138" (3.50mm)0View Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable Quantity
CONN SOCKET 16-18AWG CRIMP GOLD1722533011CONN SOCKET 16-18AWG CRIMP GOLD29431 - ImmediateView Details
CONN SOCKET 16-18AWG CRIMP TIN1722533023CONN SOCKET 16-18AWG CRIMP TIN63641 - ImmediateView Details
CONN SOCKET 20-22AWG CRIMP GOLD1722533111CONN SOCKET 20-22AWG CRIMP GOLD11057 - ImmediateView Details
CONN SOCKET 20-22AWG CRIMP TIN1722533123CONN SOCKET 20-22AWG CRIMP TIN48612 - ImmediateView Details
CONN SOCKET 16-18AWG CRIMP GOLD1722533012CONN SOCKET 16-18AWG CRIMP GOLD14286 - ImmediateView Details
CONN SOCKET 20-22AWG CRIMP GOLD1722533112CONN SOCKET 20-22AWG CRIMP GOLD2853 - ImmediateView Details

TPA Retainers

ImageManufacturer Part NumberDescriptionNumber of PositionsAvailable QuantityView Details
ULTRAFIT TPA V0 NAT 02 CKT1722642002ULTRAFIT TPA V0 NAT 02 CKT217489 - ImmediateView Details
ULTRAFIT TPA V0 BLK 05 CKT1722641005ULTRAFIT TPA V0 BLK 05 CKT510234 - ImmediateView Details
ULTRAFIT TPA V0 BLK 07 CKT1722641007ULTRAFIT TPA V0 BLK 07 CKT72160 - ImmediateView Details
ULTRAFIT TPA V0 BLK 02 CKT1722641002ULTRAFIT TPA V0 BLK 02 CKT226576 - ImmediateView Details
ULTRAFIT TPA V0 NAT 03 CKT1722642003ULTRAFIT TPA V0 NAT 03 CKT37940 - ImmediateView Details
ULTRAFIT TPA V0 NAT 04 CKT1722642004ULTRAFIT TPA V0 NAT 04 CKT483 - ImmediateView Details
ULTRAFIT TPA V0 BLK 08 CKT1722641008ULTRAFIT TPA V0 BLK 08 CKT8519 - ImmediateView Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionTool MethodTool TypeFor Use With/Related ProductsAvailable QuantityView Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDEManual172253-3011, 172253-3012, 172253-302336 - Immediate
115 - Factory Stock
View Details
Updated: 2017-07-05
Published: 2016-01-11

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