Eaton 85100AC2221SY50 Receptacle - MIL-DTL-26482 SI
Part Number: 85100AC2221SY50
Quick Summary
The Eaton Souriau 85100AC2221SY50 MIL-DTL-26482 SI qualified square flange receptacle is designed for rugged, aerospace-grade connections. Engineers often struggle with secure mating, environmental resistance, and costly field assembly in harsh environments. MIL-DTL-26482 SI qualification ensures reliability, while cadmium plating and REACH compliance enhance corrosion resistance and environmental responsibility. In practice, this square flange receptacle integrates smoothly with aerospace and industrial automation systems, delivering rugged, long-life connectivity. Engineers appreciate compatibility with 21-contact configurations and 1/3 bayonet coupling, reducing integration time. With an aluminium shell and straight backshell adaptor, this design supports streamlined field service. The compact 53 mm length, 40x40 mm footprint, and 21 contacts fit tight spaces without compromising performance.
Product Information
Extended Description
85100AC2221SY50 Eaton: Square flange receptacle, straight adaptor, cadmium plating, female solder contacts, pos Y; 85100AC2221SY50
Product Name
Eaton Souriau 851 series MIL-DTL-26482 SI qualified
Catalog Number
85100AC2221SY50
Product Length/Depth
53 mm
Product Height
40 mm
Product Width
40 mm
Product Weight
69.8 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: MIL-DTL-26482 SI qualification provides high-reliability performance in extreme environments, reducing field failures and warranty costs in aerospace and harsh industrial settings. This is crucial for programs requiring traceable, standards-based connectivity. Application: 21-contact Souriau 851 series receptacles support complex signaling and power layouts in aircraft avionics and factory automation. Feature → Business Impact → Application: Cadmium plating on an aluminium shell delivers superior corrosion resistance while keeping weight down, enabling longer service intervals and lower maintenance costs in harsh climates. Application: outdoor machinery, robotics, and utility equipment where exposure to humidity, salt spray, or temperature cycling is common. Feature → Business Impact → Application: 1/3 bayonet coupling with straight backshell adaptor ensures quick, repeatable mating and secure retention, reducing assembly time and misalignment risk on the shop floor or in the field. Application: assembly lines, military ground systems, and portable test benches requiring fast field servicing. Feature → Business Impact → Application: 53 mm length with a 40x40 mm footprint maximizes panel space efficiency while maintaining robust pin-count (21) connectivity. Application: compact avionics bays, control panels, and equipment housed in tight enclosures. Feature → Business Impact → Application: Solder Cup contact type (socket/female) simplifies PCB or wiring terminations, improving reliability and ease of maintenance. Application: harnessed equipment and cabinet builds where clean solder joints and repeatable terminations are essential. Feature → Business Impact → Application: Delivered with connector and 21-position layout support plug-and-play readiness for quick upgrades and easier substitution in legacy systems. Application: retrofit projects and new builds in automation and aerospace where time-to-deploy matters. Feature → Business Impact → Application: REACH environmental considerations alongside cadmium plating address regulatory expectations and end-user sustainability concerns. Application: industries with strict environmental compliance requirements and supplier responsibility mandates.
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FAQs
Install as a square flange receptacle with the straight backshell adaptor, ensuring the 21 solder cup contacts align with the mating connector. Use the Y orientation and 1/3 Bayonet coupling for secure latching. Confirm environmental ratings (REACH) and cadmium plating are suitable for your enclosure.
It carries MIL-DTL-26482 SI qualification, cadmium plating for corrosion resistance, and an aluminium shell for lightweight strength. Its operating range (-40 °C to 125 °C) supports reliability in temperature cycling, while REACH compliance addresses environmental requirements important for aerospace and heavy manufacturing.
Yes. The 1/3 Bayonet coupling provides fast, secure mating. Use standard mating hardware for Souriau 851 series and ensure the connector orientation is set to Y. No special tooling beyond standard torque and alignment practices is required for reliable engagement.
The product is MIL-DTL-26482 SI qualified and features cadmium plating with an aluminium shell. It also supports REACH environmental compliance. These attributes help meet regulatory requirements and support long-term field reliability in regulated industries.
The combination of MIL-DTL-26482 SI reliability, corrosion resistance from cadmium plating, and a compact aluminium shell reduces maintenance downtime and replacement costs. Its 21-contact configuration and straightforward solder cup terminations enable faster assembly and easier field servicing, improving overall equipment uptime and return on investment.