Low-Force Receptacles Accept a Wide Range of Lead Sizes

Five gold-plated Mill-Max pin receptacles in different termination styles, including two cutaway views showing the internal four-finger contact, a knurled press-fit receptacle and a hex press-fit receptacle.

Receptacles offering a wide acceptance range, low force and high current capability

Mill-Max announces the widespread release of our number 36 contact, a unique contact designed to accept a wide range of lead sizes, while providing low insertion force and high current carrying capacity. The receptacles assembled with the number 36 contact are produced in a variety of termination styles to address the many interconnect requirements typically found in electronic assemblies.

The Mill-Max number 36 contact accepts lead diameters of .022” - .042” (.56 mm – 1.07 mm), with initial insertion force averages ranging from 180 grams at the low end to 560 grams at the top of the acceptance range. The relatively low forces for these contacts makes for easier mating and de-mating of multi-pin connections. The wide acceptance range enables them to be used across applications for power and signal connections, simplifying receptacle choice, reducing the variety of components on your bill of materials and allowing for uniform mounting hole layouts. The unique design of this four-finger contact allows it to stand out for its compliancy across the entire pin acceptance range; meaning the contact can alternate accepting the largest lead followed by the smallest lead while maintaining a reliable electrical connection.

Along with wide range and low force, these receptacles exhibit low contact resistance, 4 - 10 milliohms, and high current carrying capacity, 16 amps max, 12.8 amps de-rated, making them ideal for use in connector and cable assemblies or as PCB jacks for power connections in a wide range of applications from communications equipment to pumps, fans, DC motors and industrial control equipment.

Wide acceptance range. Accepts lead diameters of .022” - .042”, simplifying receptacle choice and reducing the variety of components on your bill of materials.
Low insertion force. Easier mating and de-mating of multi-pin connections.
High current. 16 amps max, 12.8 amps de-rated, for power connections in connector and cable assemblies or as PCB jacks.
Compliant across the range. The four-finger contact can alternate accepting the largest lead followed by the smallest lead while maintaining a reliable electrical connection.

Specifications

Specification	#36 Contact Receptacles
Accepted lead diameter	.022”-.042” (0,559-1,067mm)
Contact	#36 low force contact, beryllium copper, 4 fingers, 30µ” gold over nickel
Current rating	16A at 30°C temperature rise; 12.8A derated (20%)
Contact resistance	10mΩ max
Shell	Brass alloy, 10µ” gold over nickel (0479: 200-300µ” matte tin over nickel)
Durability	1,000 cycles minimum
Operating temperature	-55°C to +125°C
Shock / vibration	No electrical discontinuity >1µs at 50g / 10-2000Hz, 20g
RoHS	Compliant

Series	Mounting	Mounting Hole
0312	Solder mount, plated through hole	.076” (1,930mm)
0327	Solder mount, plated through hole	.076” (1,930mm)
0328	Press-fit, plated through hole	.079” (2,007mm)
0405	Press-fit, non-plated hole; alternate solder tail through-hole	.084” (2,134mm); solder tail .034” (0,864mm)
0479	Solder mount, plated through hole	.077” (1,956mm)
0639	Press-fit, plated through hole	.086” (2,184mm)
0740	Press-fit, non-plated hole	.075” (1,905mm)
8206	Horizontal surface mount; alternate solder mount	Alternate mounting hole .129” (3,277mm)

High-Current Receptacle Configurations

Mill-Max is offering eight receptacles assembled with the # 36 contact with termination styles including through-hole solder mount, press-fit for plated through holes, surface mount, and wire termination, see the table below for details. All except the 0479 fibre plug style have gold plating on the shell and 30 micro inches gold plating on the contact, the 0479 has a matte tin shell finish.

Part Number	Description/Termination Style	Resources
● 0312-0-15-15-36-27-10-0	Open bottom, through-hole solder mount	DatasheetOrder SampleCheck Stock
● 0327-0-15-15-36-27-10-0	Closed bottom, through-hole solder mount	DatasheetOrder SampleCheck Stock
● 0328-0-15-15-36-27-10-0	Closed bottom, press-fit for plated hole	DatasheetOrder SampleCheck Stock
● 0405-0-15-15-36-27-04-0	Solder tail, through-hole mount	DatasheetOrder SampleCheck Stock
● 0479-0-43-80-36-27-10-0	Open bottom, fibre plug, through-hole, solder mount*	DatasheetOrder SampleCheck Stock
● 0639-0-15-15-36-27-10-0	Zero profile, open bottom, press-fit for plated hole	DatasheetOrder SampleCheck Stock
● 0740-0-18-15-36-27-10-0	Solder cup with press-fit for non-plated hole	DatasheetOrder SampleCheck Stock
● 8206-0-15-15-36-27-40-0	Surface mount	DatasheetOrder SampleCheck Stock

^●^{Normally stocked at our Authorized Distributors.}

^{* The 0479 is also available on tape & reel: change the -43- packaging code to -67- (0479-0-67-80-36-27-10-0).}

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Published Date

November 5th, 2024

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As a product design engineer, you know that connectors play a critical role in the electrical system of any product you design. It is not the place to take shortcuts, and a good connector can help avoid costly repairs and recalls down the road.

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The Mill-Max two-piece receptacle design allows for the widest mating pin acceptance range, the largest variety of shapes, sizes and materials, and multiple contact points to ensure a dependable connection every time.

Pin receptacles are typically the backbone of any interconnect system. So, why settle for anything less than the maximum in performance, reliability, and flexibility. The predictable quality of a Mill-Max interconnect can play a fundamental role in determining your products performance.

With almost 45 years of experience working with suppliers all over the world, consider specifying Mill-Max receptacles into your design, sooner rather than later, and ensure the optimal solution for the unique requirements of your application.