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0448/0640 Series Minimal Insertion Length Contact Receptacles

Mill-Max's 0448 and 0640 receptacles are designed to work with shorter mating leads

Image of Mill-Max's 0448/0640 Series Minimal Insertion Length Contact Receptacles Mill-Max's 0448 and 0640 series of minimal insertion length contact receptacles expands their range of receptacles designed to work with shorter mating leads. These receptacles are fitted with a beryllium copper contact clip which is characterized by an early engagement contact point, dual entry capability, low contact resistance, and high current carrying capacity.

The 0448-0-15-15-48-27-10-0 and 0640-0-15-15-48-27-10-0 receptacles accept lead diameters from 0.037" to 0.043" (0.94 mm to 1.09 mm) with a minimum mating lead length of 0.058" (1.47 mm) for top entry insertion. This is a 30% reduction in required lead length from their current receptacle offerings. The reduction is due to the hourglass design and extended contact surface area, eliminating the need for excess protrusion through its fingers for reliable electrical contact. The ability to use shorter mating pins provides several advantages such as compressed packaging, shorter electrical signal paths, and lower potential RF signal interference.

The 0448 is a closed bottom, solder mount receptacle with a 0.025" (0.635 mm) low profile height above the board. It is designed to be soldered in a 0.071" (1.8 mm) minimum mounting hole. The 0640 is a zero profile, solderless press-fit receptacle with an overall length of 0.105" (2.67 mm). This part features a hexagon-shaped head designed to be press-fit into a 0.085" (2.16 mm) ø plated through-hole. When pressed in, the 0640 sits flush with the PCB surface. The 0640 is also open bottom allowing for mating pin entry from either end. The minimum mating pin length for bottom entry is 0.060" (1.52 mm) from the bottom of the receptacle. This dual entry feature allows for flexibility in component placement and assembly of boards and modules.

The receptacle shells are precision turned from brass alloy, featuring tight tolerances and a high-quality finish. The contact clip is press-fit into each receptacle shell forming a gas-tight connection. It is a four-finger contact, precision-stamped from a beryllium copper strip and heat-treated to provide excellent spring and electrical properties. Both receptacles have a current rating of 20 A at a +10°C temperature rise above ambient in free air and less than 20 milliohms contact resistance. The standard plating for these receptacles is 10 µ" gold on the shell and 30 µ" gold on the contact to ensure the highest conductivity, corrosion resistance, and durability.

0448/0640 Series Minimal Insertion Length Contact Receptacles

ImageManufacturer Part NumberDescriptionTerminationLength - OverallMounting Hole DiameterAvailable QuantityView Details
CLOSED BOTTOM RECEPTACLE WITH EA0448-0-15-15-48-27-10-0CLOSED BOTTOM RECEPTACLE WITH EASolder0.140" (3.56mm)0.071" (1.80mm)6250 - ImmediateView Details
ZERO PROFILE RECEPTACLE WITH EAR0640-0-15-15-48-27-10-0ZERO PROFILE RECEPTACLE WITH EARPress-Fit, Hex0.105" (2.67mm)0.085" (2.16mm)4343 - ImmediateView Details
Published: 2019-10-08