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 NumberDescriptionContact TypeAvailable Quantity
CONN RCPT HSG 2POS 3.50MM1722561002CONN RCPT HSG 2POS 3.50MMFemale Socket6934 - ImmediateView Details
CONN RCPT HSG 3POS 3.50MM1722561003CONN RCPT HSG 3POS 3.50MMFemale Socket0View Details
CONN RCPT HSG 4POS 3.50MM1722561004CONN RCPT HSG 4POS 3.50MMFemale Socket1408 - ImmediateView Details
CONN RCPT HSG 6POS 3.50MM1722561006CONN RCPT HSG 6POS 3.50MMFemale Socket0View Details
CONN RCPT HSG 4POS 3.50MM1722581004CONN RCPT HSG 4POS 3.50MMFemale Socket0View Details

PCB Headers

ImageManufacturer Part NumberDescriptionContact TypeAvailable Quantity
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MMMale Pin0View Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MMMale Pin4 - ImmediateView Details
CONN HEADER VERT 3POS 3.5MM1722861103CONN HEADER VERT 3POS 3.5MMMale Pin0View Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MMMale Pin0View Details
CONN HEADER VERT 4POS 3.5MM1722861104CONN HEADER VERT 4POS 3.5MMMale Pin1274 - ImmediateView Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable Quantity
CONN SOCKET 16-18AWG CRIMP GOLD1722533011CONN SOCKET 16-18AWG CRIMP GOLD0View Details
CONN SOCKET 16-18AWG CRIMP TIN1722533023CONN SOCKET 16-18AWG CRIMP TIN98 - ImmediateView Details
CONN SOCKET 20-22AWG CRIMP GOLD1722533111CONN SOCKET 20-22AWG CRIMP GOLD49 - ImmediateView Details
CONN SOCKET 20-22AWG CRIMP TIN1722533123CONN SOCKET 20-22AWG CRIMP TIN0View Details
CONN SOCKET 16-18AWG CRIMP GOLD1722533012CONN SOCKET 16-18AWG CRIMP GOLD0View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722533112CONN SOCKET 20-22AWG CRIMP GOLD24890 - ImmediateView Details

TPA Retainers

ImageManufacturer Part NumberDescriptionPart StatusAvailable QuantityView Details
ULTRAFIT TPA V0 NAT 02 CKT1722642002ULTRAFIT TPA V0 NAT 02 CKTActive9419 - ImmediateView Details
ULTRAFIT TPA V0 BLK 05 CKT1722641005ULTRAFIT TPA V0 BLK 05 CKTActive1008 - ImmediateView Details
ULTRAFIT TPA V0 BLK 07 CKT1722641007ULTRAFIT TPA V0 BLK 07 CKTActive3695 - ImmediateView Details
ULTRAFIT TPA V0 BLK 02 CKT1722641002ULTRAFIT TPA V0 BLK 02 CKTActive23351 - ImmediateView Details
ULTRAFIT TPA V0 NAT 03 CKT1722642003ULTRAFIT TPA V0 NAT 03 CKTActive18312 - ImmediateView Details
ULTRAFIT TPA V0 NAT 04 CKT1722642004ULTRAFIT TPA V0 NAT 04 CKTActive0View Details
ULTRAFIT TPA V0 BLK 08 CKT1722641008ULTRAFIT TPA V0 BLK 08 CKTActive0View Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionPackagingPart StatusTool MethodAvailable QuantityView Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDEBulkActiveManual45 - Immediate
75 - Factory Stock
View Details
Updated: 2017-07-05
Published: 2016-01-11

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