Eaton 85100AC2221SZ50 Square Flange Receptacle - MIL-DTL-26482 SI Qualified
Part Number: 85100AC2221SZ50
Quick Summary
The Eaton 85100AC2221SZ50 Square Flange Receptacle is a MIL-DTL-26482 SI qualified connector designed for rugged avionics and industrial automation harnesses. Engineers often struggle with mating reliability and costly maintenance when selecting high-density interconnects for harsh environments. This part delivers a 21-contact, solder-cup interface in an aluminium shell with cadmium plating, providing robust corrosion resistance. Its straight backshell, Z orientation, and 1/3 bayonet coupling enable quick assembly and secure locking in tight spaces. Coupled with REACH compliance and MIL-spec qualification, it supports compliant procurement and reliable uptime, delivering measurable reductions in installation time and lifecycle costs for aerospace, defense, and industrial systems.
Product Information
Extended Description
85100AC2221SZ50 Eaton: Square flange receptacle, straight adaptor, cadmium plating, female solder contacts, pos Z; 85100AC2221SZ50
Product Name
Eaton Souriau 851 series MIL-DTL-26482 SI qualified
Catalog Number
85100AC2221SZ50
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
Z
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: High-density 21-contact configuration provides 21 cavities in a square flange receptacle, enabling more signals per connection while maintaining compact panel space. Business Impact: Reduces harness complexity and panel footprint, cutting assembly time and cabling costs. Application: Backplane interconnects and multi-channel sensor arrays in aerospace, defense, and industrial automation. Feature: Solder Cup contacts (Socket/Female) offer robust, soldered terminations compatible with common manufacturing processes. Business Impact: Improves termination reliability and swimming stability of signal paths, lowering field repair rates. Application: Wire-to-board harnesses and field-installed cabling in harsh environments. Feature: 1/3 Bayonet coupling provides fast, vibration-resistant mating with confident retention. Business Impact: Shortens installation cycles and reduces rework during maintenance in mobile or airborne platforms. Application: Rapid field assembly in avionics enclosures and rugged industrial equipment. Feature: Cadmium plating on an aluminium shell delivers corrosion resistance and durable surface performance. Business Impact: Extends connector life in humidity, salt spray, and dusty environments, lowering replacement costs. Application: Coastal industrial facilities, outdoor installations, and military-aerospace environments. Feature: Backshell adaptor with straight backshell and Z orientation simplifies harness routing and alignment. Business Impact: Eases installation in tight panels and reduces misalignment risk during mating. Application: High-density harnesses in compact equipment and control panels. Feature: Operating temperature range -40 to 125 °C broadens environmental tolerance. Business Impact: Maintains electrical integrity across extreme climates without extra cooling or enclosure requirements. Application: Automotive, defense, and outdoor industrial applications. Feature: 53 mm length, 40 mm width, 40 mm height with a 22-shell size keeps the footprint manageable while delivering robust mechanical support. Business Impact: Facilitates integration into compact enclosures and reduces overall system size. Application: Small-form-factor deployments in aerospace and machinery automation.
Get a Quick Quote for a Eaton 85100AC2221SZ50
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton 85100AC2221SZ50?
Enquire Now
FAQs
The 85100AC2221SZ50 uses a square flange receptacle with a straight backshell and Z orientation, enabling secure alignment in tight panels. Its 53 mm length and 40 mm width profile fit compact enclosures while the 1/3 bayonet coupling provides fast, reliable mating even in vibration-prone installations. Ensure mounting holes match the 22-shell size footprint and the adaptor backshell is properly seated to maintain seal integrity.
This Eaton connector features 21 solder cup contacts arranged in a 21-position layout, with cadmium plating on an aluminium shell. The contact design supports robust solder terminations and reliable signal integrity across the operating temperature range. It is designed to withstand -40 °C to 125 °C, making it suitable for aerospace, defense, and rugged industrial applications.
Yes. The 85100AC2221SZ50 is MIL-DTL-26482 SI qualified and REACH compliant, aligning with military-grade interconnect standards and modern environmental regulations. This supports regulated procurement and long-term supply chain stability for programs requiring strict conformity and traceability in both aerospace and industrial sectors.
The 21-contact layout in a compact square flange form factor, combined with solder-cup contacts and a 1/3 bayonet coupling, delivers high-density terminations with reliable mating under vibration. The aluminium shell with cadmium plating provides corrosion resistance, while the wide -40 to 125 °C operating range ensures performance in extreme environments typical of defense and aerospace systems.
With quick-mating bayonet coupling, proven MIL-spec qualification, and corrosion-resistant cadmium plating, maintenance cycles are shortened and part replacements delayed. The 21-way configuration reduces harness complexity, lowering wiring errors, installation time, and inventory fragmentation—delivering lower total cost of ownership for military, aerospace, and heavy industrial deployments.