Eaton 85100A2221SY50 Receptacle - MIL-DTL-26482 SI qualified
Part Number: 85100A2221SY50
Quick Summary
The Eaton 85100A2221SY50 is a MIL-DTL-26482 SI qualified square flange receptacle for rugged aerospace and industrial use. Designers often contend with maintaining signal integrity and environmental protection under vibration and wide temperature swings. This connector delivers MIL-DTL-26482 SI qualification and REACH compliance, plus a cadmium-plated aluminium shell for durability in harsh conditions. With a straight backshell adaptor and a Y-oriented, 21-contact layout, it supports reliable, plug-and-play integration in constrained equipment frames. The combination of cadmium plating, socket solder contacts, and a 44 mm length helps simplify routing and mating in tight assemblies. Businesses gain predictable performance, extended service life, and lower field maintenance costs by standardizing on this proven Souriau style.
Product Information
Extended Description
85100A2221SY50 Eaton: Square flange receptacle, straight adaptor, cadmium plating, female solder contacts, pos Y; 85100A2221SY50
Product Name
Eaton Souriau 851 series MIL-DTL-26482 SI qualified
Catalog Number
85100A2221SY50
Product Length/Depth
44 mm
Product Height
40 mm
Product Width
40 mm
Product Weight
58.5 g
Environmental conditions
REACH
Backshell angle
Straight
Backshell type
Adaptor
Connector accessory option
Delivered with connector
Connector orientation
Y
Connector type
Receptacle
Contact delivery
Loaded
Contact gender
Socket (Female)
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 → Business Impact → Application: The 85100A2221SY50 uses a cadmium-plated aluminium shell to resist corrosion in harsh environments, reducing maintenance costs and extending service life in aerospace and industrial equipment. This translates to fewer field failures and lower downtime during mission-critical operations, especially in vibration-prone installations where connector integrity is paramount. Feature → Application: The 21-contact, socket (Female) solder cup arrangement supports dense harnessing and reliable signal transmission in compact panels, ideal for avionics bays or control housings where space is at a premium. Feature → Application: The 1/3 bayonet coupling provides quick, repeatable mating and secure retention, enabling faster assembly and servicing on production lines or in the field. Feature → Application: Cadmium plating and aluminium shell offer a lightweight yet durable solution suitable for high-temperature environments up to 125 °C, improving performance in thermal cycles common to heavy machinery. Feature → Application: The straight backshell adaptor with Y orientation aligns with harness routing needs, simplifying installation and reducing cabling strain in constrained enclosures. Feature → Application: With delivered with connector and loaded contact delivery, technicians benefit from streamlined inventory and faster onboarding for maintenance teams. This combination of specifications supports compliance, efficiency, and cost reduction across aerospace and industrial programs.
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FAQs
Plan the panel cutout to match the 40x40 mm footprint and verify proper alignment before mating. Use the straight backshell adaptor to maintain correct spacing, ensure the Y orientation aligns with harness routing, and verify that the 21 solder cup contacts are clean and properly loaded. Mating should be performed smoothly to avoid binding or misalignment, reducing rework on the line.
Key specs include 21 contacts (socket/female solder cup), 1/3 bayonet coupling, cadmium plating, aluminium shell, and a 44 mm length with a 40x40 mm footprint. Operating temperature ranges from -40 °C to 125 °C, and the assembly is REACH compliant. The weight is approximately 58.5 g, and the layout is configured for straight mating with the adaptor.
Yes. The connector is specified with REACH environmental compliance, aligning with European regulations on chemical substances. Its cadmium plating, while providing durability and corrosion resistance, is managed in a way that supports compliance in many regulated applications. Always verify your organization’s internal cadmium handling policies when integrating legacy Souriau-style parts.
The loaded contact delivery with solder cup contacts simplifies wiring, while the 1/3 bayonet coupling enables quick, repeatable mating and disconnection. The cadmium-plated aluminium shell delivers durable performance in challenging environments, reducing corrosion-related outages. Its compact 44 mm length and straight adaptor support fast installation in tight cabinets, lowering field technician time and labor costs.
The 85100A2221SY50 is designed for integration with Souriau 851 series components using a straight backshell adaptor and Y orientation. Its 21-contact layout aligns with the standard Souriau 21-position receptacle configuration, and the 1/3 bayonet coupling provides a consistent mating mechanism across compatible male/female counterparts, facilitating modular harness design and inventory consistency.