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Ultra-Fit Connectors

Wire-to-Board

Ultra-Fit Connectors

With the increasing demand for more power in smaller space, thermal management and increased functionality are significant concerns for design engineers. Ultra-Fit Connectors deliver high-density, high-current solutions for advanced electronic designs. These connectors are compact, optimizing PCB space while providing enhanced power for demanding applications. Various configurations and keying options enhance design flexibility and reduce mis-mating risks. For unparalleled performance and efficiency, Ultra-Fit Connectors are feature-rich, delivering cost savings, safety and robust interconnect reliability

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Current  Pitch  Wire AWG Operating Temperature
Up to 14.0A 3.50mm 22 to 16 -40 to +120°C

PCB Headers

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Receptacle Housings

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Cable Assemblies

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Crimp Terminals

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Connector Accessories

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Features and Benefits

Customers require high power in a small form factor to allow for space savings without sacrificing the power they need to meet their design requirements. Ultra-Fit Connectors optimize PCB space by offering a compact package that provides superior power-handling to meet high-current demands. With these connectors, manufacturers can leverage space-saving opportunities to achieve their design objectives. 

Designers are also challenged to expand product functionality without increasing the overall size of the device. Ultra-Fit Connectors offer a 3.50mm pitch size with various configurations and mechanically keyed, color-coded options to increase design flexibility and reduce mis-mating risks. With tangless terminals, same-circuit, multiple-connector use, and an ultra-low mating force, these connectors allow engineers additional design flexibility to improve device functionality without increasing the overall connector size. 

As products require more power in miniaturized devices, managing heat effectively is becoming increasingly critical.​ Ultra-Fit Connectors are designed to safely carry more current without overheating due to their longer centerline to accommodate a larger wire insulation diameter. These connectors are also Glow Wire capable and provide low halogen properties while maintaining flame resistance. ​As a result, customers can safely manage heat dissipation, while maintaining system reliability and high performance.

Potting Capability

Ultra-Fit Connectors provide potting-capable headers, allowing for raw material cost savings by eliminating the need for sealant application. Leveraging a vast catalog of products, these connectors eliminate the need for custom connectors by reducing tooling labor costs.​

Ultra-Fit Receptacle Housing

Design Flexibility for Miniaturization Advancements

As consumers seek enhanced features in devices, designers are challenged to expand functionality without increasing the overall size—and often to make devices even smaller, making design flexibility imperative. The Ultra-Fit Connector family provides a broad range of products, enabling design engineers to optimize board space and meet these evolving demands efficiently.

Ultra-Fit Connectors

Low Mating Force and Mechanically Keyed Connectors

With their low mating force terminals, Ultra-Fit Connectors reduce operator fatigue and improve assembly compliance for high-circuit applications. These connectors feature mechanically keyed color-coding options and tangless receptacles to help prevent mis-mating and unmating.​

Ultra-Fit Tangless Receptacle

Allows same-circuit, multiple-connector use with virtually no chance of cross-mating​
Multiple mechanically keyed color-coded options provide visual indication of the proper mating connector, enabling faster assembly.​

Reduces operator fatigue and improves assembly compliance for high-circuit applications
The ultra-low mating force terminal reduces mating force by 25% compared to Mini-Fit Sigma Connectors.

Helps prevent terminal backout and cable strain
The internal locking mechanism on tangless receptacles ensures that terminals are fully locked into place.

Provides significant space savings on the PCB
These connectors have a 3.50mm pitch, allowing for a small package with high current.

Offers improved board retention
Solder nails are enhanced on the surface mount versions.

Delivers high current capacity with thermal protection
The longer centerline (3.50mm) allows for a larger wire insulation diameter capability for higher ampacity.

Ensures the mated connector will not accidentally disengage
The connector position assurance (CPA) option allows for additional locking security.

Datasheets and Guides

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Low-Power and Signal, Potting-Capable Vertical Headers

PCB potting is a great option for your applications that require resistance to humidity, shock, vibration and impacts. Enhance your product’s stability with moisture-tight protection from the environment, while also ensuring secure connector retention and latching. Molex offers a versatile range of potting-capable, low-power and signal vertical PCB headers for a variety of applications.

Ultra-Fit Power Connectors

Optimize space savings while providing exceptional power handling in a compact design. Ultra-fit Connectors are designed for low mating force and limit the risk of same-circuit, multiple connector cross mating. These products offer tangless terminals eliminating the risk of tangs deforming during packing and housing insertion. Molex Ultra-Fit Connectors offer design engineers a high-density, high-current solution that ensures performance, efficiency and design flexibility with compact, secure connections.

Color and Mechanically Keyed Products

Various configurations and keying options expand design flexibility and reduce mis-mating risks. Color and mechanically keyed options also help prevent mis-mating and cross -mating errors, while improving assembly procedures. These features ensure secure, reliable connections, making Molex color and mechanically keyed products ideal for applications requiring high performance and efficiency.

Low-Mating Force (LMF) Connectors for Improved Ergonomics

An increasing demand for more high-tech electronics with complex designs has resulted in operator safety concerns and process inefficiencies. Low Mating Force (LMF) and zero insertion force (ZIF) connectors require minimal operator effort, allowing for ease of assembly. With exceptional housing pre-alignment and reduced pin stubbing, LMF connectors improve operator ergonomics for increased safety and process efficiency. Learn more about overcoming insertion force challenges faced in the home appliance industry.

Applications by Industry

Dishwasher
Dryer
Microwave
Oven
Refrigerator
Washing machine

USB charging ports
Infotainment

Servers
Switches

This is not a definitive list of applications for this product. It represents some of the more common uses.

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