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
RCPT HSG SGL V0 BLK 02 CKT1722561002RCPT HSG SGL V0 BLK 02 CKT20View Details
RCPT HSG SGL V0 BLK 03 CKT1722561003RCPT HSG SGL V0 BLK 03 CKT32369 - ImmediateView Details
RCPT HSG SGL V0 BLK 04 CKT1722561004RCPT HSG SGL V0 BLK 04 CKT417967 - ImmediateView Details
RCPT HSG SGL V0 BLK 06 CKT1722561006RCPT HSG SGL V0 BLK 06 CKT61630 - ImmediateView Details
RCPT HSG DUAL V0 BLK 04 CKT1722581004RCPT HSG DUAL V0 BLK 04 CKT48229 - ImmediateView Details

PCB Headers

ImageManufacturer Part NumberDescriptionPitch - MatingAvailable Quantity
CONN HEADER VERT 2POS 3.5MM1722861102CONN HEADER VERT 2POS 3.5MM0.138" (3.50mm)8682 - ImmediateView Details
CONN HEADER VERT 2POS 3.5MM1722861202CONN HEADER VERT 2POS 3.5MM0.138" (3.50mm)4318 - ImmediateView Details
CONN HEADER VERT 3POS 3.5MM1722861103CONN HEADER VERT 3POS 3.5MM0.138" (3.50mm)3238 - ImmediateView Details
CONN HEADER VERT 3POS 3.5MM1722861203CONN HEADER VERT 3POS 3.5MM0.138" (3.50mm)1838 - ImmediateView Details
CONN HEADER VERT 4POS 3.5MM1722861104CONN HEADER VERT 4POS 3.5MM0.138" (3.50mm)4096 - ImmediateView Details

Crimp Terminals

ImageManufacturer Part NumberDescriptionAvailable Quantity
CONN SOCKET 16-18AWG CRIMP GOLD1722533011CONN SOCKET 16-18AWG CRIMP GOLD90727 - Immediate
15000 - Factory Stock
View Details
CONN SOCKET 16-18AWG CRIMP TIN1722533023CONN SOCKET 16-18AWG CRIMP TIN86806 - Immediate
165000 - Factory Stock
View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722533111CONN SOCKET 20-22AWG CRIMP GOLD21753 - Immediate
120000 - Factory Stock
View Details
CONN SOCKET 20-22AWG CRIMP TIN1722533123CONN SOCKET 20-22AWG CRIMP TIN49333 - Immediate
510000 - Factory Stock
View Details
CONN SOCKET 16-18AWG CRIMP GOLD1722533012CONN SOCKET 16-18AWG CRIMP GOLD30605 - Immediate
210000 - Factory Stock
View Details
CONN SOCKET 20-22AWG CRIMP GOLD1722533112CONN SOCKET 20-22AWG CRIMP GOLD27635 - ImmediateView Details

TPA Retainers

ImageManufacturer Part NumberDescriptionNumber of PositionsAvailable QuantityView Details
ULTRAFIT TPA V0 NAT 02 CKT1722642002ULTRAFIT TPA V0 NAT 02 CKT234898 - ImmediateView Details
ULTRAFIT TPA V0 BLK 05 CKT1722641005ULTRAFIT TPA V0 BLK 05 CKT52637 - ImmediateView Details
ULTRAFIT TPA V0 BLK 07 CKT1722641007ULTRAFIT TPA V0 BLK 07 CKT72338 - ImmediateView Details
ULTRAFIT TPA V0 BLK 02 CKT1722641002ULTRAFIT TPA V0 BLK 02 CKT213623 - Immediate
5000 - Factory Stock
View Details
ULTRAFIT TPA V0 NAT 03 CKT1722642003ULTRAFIT TPA V0 NAT 03 CKT35888 - Immediate
16000 - Factory Stock
View Details
ULTRAFIT TPA V0 NAT 04 CKT1722642004ULTRAFIT TPA V0 NAT 04 CKT48142 - Immediate
8000 - Factory Stock
View Details
ULTRAFIT TPA V0 BLK 08 CKT1722641008ULTRAFIT TPA V0 BLK 08 CKT81186 - ImmediateView Details

Crimpers and Applicators

ImageManufacturer Part NumberDescriptionTool TypeFor Use With/Related ProductsFeaturesAvailable QuantityView Details
TOOL HAND CRIMPER 172253 SIDE0638275300TOOL HAND CRIMPER 172253 SIDEHand Crimper172253-3011, 172253-3012, 172253-3023Side Entry, Ratchet26 - Immediate
30 - Factory Stock
View Details
Updated: 2017-07-05
Published: 2016-01-11

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