Eaton 85100E2255PY50 Receptacle - MIL-DTL-26482 SI Qualified
Part Number: 85100E2255PY50
Quick Summary
The Eaton 85100E2255PY50 receptacle delivers MIL-DTL-26482 SI qualified interconnect performance for rugged aerospace, defense, and industrial automation applications. Engineers often face harsh environments, tight installation envelopes, and long-term corrosion risk; this connector is designed to address those challenges with a cadmium-plated aluminium shell, backnut mounting, and a straight backshell. It provides 55 solder cup male contacts in a compact 34.5 mm length and 40 mm square footprint with Y orientation and 1/3 bayonet coupling for secure, vibration-resistant mating. The 55-position design supports high-density signal and power transfer while aligning with REACH environmental expectations for modern programs. Delivered-with connector options streamline panel integration and ensure consistent installation across builds, reducing lifecycle risk and total cost of ownership.
Product Information
Extended Description
85100E2255PY50 Eaton: Square flange receptacle, with backnut, cadmium plating, male solder contacts, pos Y; 85100E2255PY50
Product Name
Eaton Souriau 851 series MIL-DTL-26482 SI qualified
Catalog Number
85100E2255PY50
Product Length/Depth
34.5 mm
Product Height
40 mm
Product Width
40 mm
Product Weight
56.6 g
Environmental conditions
REACH
Backshell angle
Straight
Backshell type
Backnut
Connector accessory option
Delivered with connector
Connector orientation
Y
Connector type
Receptacle
Contact delivery
Loaded
Contact gender
Pin (Male)
Contact type
Solder Cup
Coupling type
1/3 Bayonet
Layout
55
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
55
Number of cavity #20
55
Feature: MIL-DTL-26482 SI qualified interconnect ensures robust performance in mission-critical environments → Business Impact: Improves reliability and program compliance in aerospace, defense, and industrial automation programs → Application: High-vibration aircraft assemblies and harsh industrial enclosures. Feature: 55 contact positions in a 40 x 40 mm footprint → Business Impact: Enables high-density data and power transfer without increasing panel size → Application: Control panels and sensor networks with limited real estate. Feature: Cadmium plating on an aluminium shell → Business Impact: Enhances corrosion resistance for outdoor or saline environments, extending service life → Application: Marine, coastal facilities, and armored deployments. Feature: 1/3 Bayonet coupling with backnut and straight backshell → Business Impact: Quick, secure mating with reduced maintenance time and field rework → Application: Assembly lines and field service in tight spaces. Feature: Solder Cup contacts and Y orientation → Business Impact: Reliable solder termination with consistent orientation for complex harnesses → Application: High-density harnesses and multi-connector assemblies. Feature: Operating temperature range -40 °C to 125 °C → Business Impact: Maintains performance across extreme climates, reducing thermal-related failures → Application: Aerospace, defense, and industrial environments with wide temperature swings.
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FAQs
The 85100E2255PY50 uses a square flange receptacle with a backnut for panel mounting, delivering a compact 34.5 mm depth and a 40 x 40 mm footprint. The backnut and straight backshell simplify installation in tight spaces, while the Y orientation aligns with common harness routing. This makes panel integration predictable and repeatable across assemblies.
This receptacle provides 55 solder cup male contacts arranged in 55 cavities, suitable for high-density signal and power transfer. The 1/3 bayonet coupling ensures secure mating, while the backnut and aluminium shell provide mechanical robustness. All contacts are delivered loaded, ready for installation in demanding environments such as aerospace and defense panels.
Yes. The connector operates from -40 °C to 125 °C, supporting equipment exposed to wide thermal ranges. It uses cadmium plating on an aluminium shell to enhance corrosion resistance, and it aligns with REACH environmental considerations, helping program teams meet regulatory expectations during qualification and supply chain audits.
Ideal for aerospace, defense, and rugged industrial automation where high-density interconnects, vibration resistance, and reliable mating are critical. With 55 contacts, a backnut mounting option, and a 1/3 bayonet coupling, it supports mission-critical panels, avionics racks, and harsh-environment control systems that require durable, long-life interconnects.
Plan for proper panel cutouts to accommodate the 40 x 40 mm footprint and ensure correct alignment for the Y-oriented mating interface. Use the backnut for secure mounting and verify solder cup terminations meet your harness specifications. The delivered-with connector option simplifies procurement and reduces field assembly variance, supporting consistent maintenance cycles.