Eaton 85100A2221PX50 Receptacle - MIL-DTL-26482 SI-qualified
Part Number: 85100A2221PX50
Quick Summary
Eaton 85100A2221PX50 is a MIL-DTL-26482 SI qualified square flange receptacle for rugged military and aerospace connectors. Engineers often struggle with ensuring reliable mating under vibration and temperature extremes in harsh environments. MIL-DTL-26482 SI qualification and REACH environmental compliance help minimize risk, certification delays, and field failures. Designed for 21-contact cavities with a straight backshell and 1/3 bayonet coupling, it supports high-density assemblies in aerospace, defense, and heavy industrial automation. The compact aluminium shell with cadmium plating resists corrosion while keeping weight minimal, supporting quick field replacements and consistent performance across -40 to 125 °C. Additionally, compatibility with connector accessories and easy solder cup contacts streamline installation and maintenance, delivering business value through reduced downtime and longer service life. This makes installation easier with compatibility to Souriau 851 series accessories and solder cup contacts for streamlined procurement and field support.
Product Information
Extended Description
85100A2221PX50 Eaton: Square flange receptacle, straight adaptor, cadmium plating, male solder contacts, pos X; 85100A2221PX50
Product Name
Eaton Souriau 851 series MIL-DTL-26482 SI qualified
Catalog Number
85100A2221PX50
Product Length/Depth
44 mm
Product Height
40 mm
Product Width
40 mm
Product Weight
51 g
Environmental conditions
REACH
Backshell angle
Straight
Backshell type
Adaptor
Connector accessory option
Delivered with connector
Connector orientation
X
Connector type
Receptacle
Contact delivery
Loaded
Contact gender
Pin (Male)
Contact type
Solder Cup
Coupling type
1/3 Bayonet
Layout
21
Plating
Cadmium
Shell material
Aluminium
Shell size
22
Operating temperature - max
125 °C
Operating temperature - min
-40 °C
Receptacle type
Square Flange Receptacle
Number Of Contacts
21
Number of cavity #16
21
Feature: MIL-DTL-26482 SI qualification. Business Impact: This certification reduces risk, accelerates program acceptance, and enhances traceability for defense and aerospace procurement. Application: Suits rugged plug-and-receptacle assemblies in aircraft, naval, and industrial automation environments where documented reliability matters. Feature: Square flange receptacle with straight adaptor. Business Impact: Simplifies panel mounting, alignment, and mating, reducing installation time and error. Application: Ideal for control panels and equipment housings requiring a compact, stable interface in tight spaces. Feature: Cadmium plating and aluminium shell. Business Impact: Delivers corrosion resistance and weight efficiency, lowering maintenance costs and improving field uptime. Application: Suitable for outdoor or high-humidity deployments in both aerospace and heavy industry. Feature: 21 contact cavities with Pin male solder cup contacts. Business Impact: Enables robust signal and power distribution with reliable solder joints; Layout supports dense channel arrangements. Application: Fits 21-pin configurations in Souriau 851 series backshell assemblies. Feature: Backshell adaptor, 1/3 Bayonet coupling, orientation X, delivered with connector. Business Impact: Enables quick, secure mating and reliable signal integrity under vibration; Application: Used in aerospace connectors with Souriau 851 series. Feature: Operating envelope and dimensions. Business Impact: Maintains compatibility with existing racks and enclosures, reducing redesigns. Application: 44 mm length, 40 mm width, 40 mm height, 51 g weight, operating -40 to 125 °C, REACH compliant.
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FAQs
To install the Eaton 85100A2221PX50, align the square flange receptacle with the panel cutout and slide the backshell adaptor into place. Mate using the 1/3 bayonet coupling with the complementary plug, then confirm solder-cup contacts are fully seated. The unit is delivered with connector, simplifying integration; mount with standard hardware and verify orientation X for correct alignment.
Reliability is driven by the operating temperature range of -40 to 125 °C, the aluminium shell, cadmium plating, and the 1/3 bayonet coupling that maintains mating integrity under shock and vibration. With 21 solder-cup contacts, consistent contact pressure and robust connector alignment are achieved, reducing intermittent connections in harsh environments common to aerospace and industrial automation.
Yes. The receptacle is MIL-DTL-26482 SI qualified and REACH compliant, designed for aerospace and defense applications as well as rugged industrial automation. Its cadmium-plated aluminium shell provides corrosion resistance and light weight, while the straight adaptor and straight orientation support reliable mating in compact, high-density installations typical of aircraft, ground support equipment, and heavy machinery.
The primary standard is MIL-DTL-26482 with SI qualification, which ensures performance under stringent military and aerospace requirements. In addition, the part is REACH compliant, addressing environmental and chemical safety. These certifications help streamline procurement, regulatory compliance, and long-term maintenance planning for complex programs.
The 85100A2221PX50 delivers lifecycle value through proven MIL-DTL-26482 performance, corrosion resistance from cadmium plating, and reduced downtime due to reliable solder-cup contacts and quick, secure mating with 1/3 Bayonet coupling. Its compatibility with Souriau 851 accessories simplifies spares management and field servicing, lowering total cost of ownership over the product life cycle.