Eaton 85100E2221PX50 Receptacle - MIL-DTL-26482 SI Qualified

Part Number: 85100E2221PX50
Manufacturer
Eaton
Part number
85100E2221PX50

Quick Summary

The 85100E2221PX50 is a MIL-DTL-26482 SI qualified square flange receptacle for rugged industrial interconnects. In harsh environments, engineers struggle to maintain reliable contact performance and achieve quick, mess-free field assembly. This part carries MIL-DTL-26482 SI qualification, REACH compliance, and a cadmium-plated aluminium shell to balance durability and regulatory alignment. Designed for power interconnects in automation, aerospace, and heavy industry, it supports long service life, predictable maintenance, and easier upgrades. With 21 positions and solder cup contacts, it ensures robust, low-resistance connections in tight installations. This makes it a reliable choice when reducing downtime and total cost of ownership is critical.

Product Information

Extended Description

85100E2221PX50 Eaton: Square flange receptacle, with backnut, cadmium plating, male solder contacts, pos X; 85100E2221PX50
Product Name
Eaton Souriau 851 series MIL-DTL-26482 SI qualified
Catalog Number
85100E2221PX50
Product Length/Depth
34.5 mm
Product Height
40 mm
Product Width
40 mm
Product Weight
53 g
Environmental conditions
REACH
Backshell angle
Straight
Backshell type
Backnut
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 → Business Impact → Application: The 85100E2221PX50 uses a 21-position contact layout with solder cup contacts, enabling dense, low-resistance connections that support higher power throughput and compact panel designs in automated equipment. This translates to improved system efficiency and simpler wiring harnesses in control cabinets and remote I/O modules. Application: suitable for high-density interconnects in industrial automation and machine builds. Feature → Business Impact → Application: Cadmium plating on an aluminium shell provides corrosion resistance while keeping weight down, extending service life in outdoor or washdown environments and reducing maintenance cycles. Application: outdoor installations, harsh factories, and marine-adjacent facilities. Feature → Business Impact → Application: 1/3 bayonet coupling with a backnut backshell design simplifies field mating, reduces installation time, and improves vibration resistance in mobile machinery and robotics. Application: quick-field upgrades and reliable performance in rugged environments. Feature → Business Impact → Application: Square flange receptacle geometry and X-oriented connector alignment streamline panel layout and mating with mating connectors, reducing misalignment risk and enabling repeatable installations. Application: industrial panels, control rooms, and process automation racks. Feature → Business Impact → Application: Operating temperature range from -40 °C to 125 °C ensures stable performance across environmental extremes, lowering the chance of thermal degradation and unexpected downtime. Application: aerospace ground equipment, oil & gas, and heavy manufacturing. Feature → Business Impact → Application: Cadmium-plated finish and backnut backshell deliver durable sealing and ease of installation, minimizing field service time and improving reliability in vibration-prone environments. Application: defense and industrial equipment subject to frequent handling.

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FAQs

The 85100E2221PX50 is a square flange receptacle with a backnut backshell, designed for a 21-contact configuration and solder cup contacts. It features a 1/3 bayonet coupling and X orientation to ensure secure mating and straightforward panel mounting. It is compatible with Eaton Souriau 851 series mating connectors and standard MIL-DTL-26482 SI interfaces for reliable field integration.
This receptacle operates from -40 °C to 125 °C, covering extreme industrial and aerospace environments. It provides 21 solder cup contacts in a single receptacle shell, arranged in a 21-position layout, with pin (male) contact gender and backnut backshell for robust interconnection and ease of installation.
Yes. The unit is MIL-DTL-26482 SI qualified, uses cadmium plating on an aluminium shell for corrosion resistance, and supports a wide operating temperature range. These features, combined with a straight backshell and secured 1/3 bayonet coupling, make it well-suited for demanding factories, outdoor installations, and mobile equipment subjected to vibration.
The part is MIL-DTL-26482 SI qualified, which reflects a proven military interconnect standard. It also adheres to REACH environmental requirements, providing regulatory confidence for European and global deployments. The cadmium plating is part of the corrosion protection strategy, balancing durability with regulatory considerations.
Use the backnut backshell for a secure, vibration-resistant mount and follow standard panel cutouts aligned to the square flange footprint. Confirm correct mating with the designated 851 series components, ensure proper insulation of solder cup terminations, and apply standard torque guidelines for mounting hardware to avoid over-tightening that could damage the housing or contacts.