SOURIAU 851 MIL-DTL-26482 Series I Connectors Introduction

SOURIAU 851 Series connectors are high-reliability metal circular connectors qualified to MIL-DTL-26482 Series I. Originally developed for aircraft electrical systems, the series is now widely used in military vehicles, instrumentation, robotics, railway equipment, geophysical systems and industrial machinery.

The 851 Series uses a positive 1/3-turn bayonet coupling. Three locking studs on the receptacle engage with the plug coupling ring, providing quick mating and an audible indication that the connector is locked. Multiple insert orientations are available to prevent incorrect mating when several connectors with the same shell size are installed together.

Eaton specifies up to 500 mating cycles, up to 500 hours of salt-spray resistance and an operating temperature range of −55°C to +125°C for the series.

Main Specifications

Specifications depend on the shell style, plating, contact arrangement, termination and environmental class.

851 Connector Shell Styles

Square Flange Receptacle

Square flange receptacles mount directly to an equipment panel or enclosure. Depending on the part number, they may be supplied with a cable clamp, heat-shrink backshell, backnut or no backshell.

Common body codes include:

• 85100: Square flange receptacle with selected backshell configurations

• 85102: Square flange receptacle without a conventional cable backshell

Typical models:

• 85100E84P50

• 85100RC833S50

• 85102E106P50

• 85102E1419S50

In-Line Receptacle

In-line receptacles allow cable-to-cable connection without requiring panel mounting. They are commonly identified by the 85101 body code.

Typical models:

• 85101E1098P50

• 85101A2232SW50

• 85101R1832PW50

Straight Cable Plug

Straight cable plugs are commonly identified by the 85106 body code. Different versions are available with a backnut, cable clamp, heat-shrink backshell or sealing gland.

Typical models:

• 85106EC1419P50

• 85106E1626P50

• 85106RC83AS50

• 85106JC2461P50

Jam Nut Receptacle

Jam nut receptacles are installed through a circular panel cutout and secured from the rear. They are commonly identified by the 85107 body code.

Typical model:

• 85107E1098P50

Right-Angle Connector

Right-angle cable exit versions help reduce installation depth and control the cable routing direction. The 85108 body code is used on selected right-angle configurations.

Typical model:

• 85108RC1419PY50

Common SOURIAU 851 Models

Application Industries

Civil and Military Aerospace

The 851 Series is used for avionics, navigation equipment, communication systems, flight instrumentation and aircraft electrical subsystems.

Military Vehicles

Bayonet locking, metal shells and environmental configurations are suitable for vehicle control units, communication systems and field equipment.

Railway Equipment

851 connectors can be used for onboard controls, sensors, auxiliary systems and equipment connections requiring metal circular connectors.

Industrial Automation and Robotics

Compact models support sensors and actuators, while larger contact layouts can connect robot controllers, production equipment and distributed machinery.

Geophysical and Survey Equipment

Environmentally sealed metal connectors are suitable for data acquisition units, field instruments and measurement equipment.

Off-Road and Mining Machinery

High-vibration equipment can use the 851 Series for control modules, sensors, lighting and auxiliary electrical systems.

Test and Measurement

Multiple shell sizes and cable exit options support laboratory instruments, portable test systems and removable measurement harnesses.

SOURIAU 851 vs 8D vs UTS

The 851 and 8D Series are not directly interchangeable. They use different military standards, coupling systems, dimensions and insert interfaces.