- Full Description
- Features & Specification
- Important Notices
The Souriau 851 Series from Eaton is a family of circular connectors designed for demanding environments, widely used across aeronautical, military, and industrial applications. These connectors are fully qualified to the MIL‑DTL‑26482 Series 1 standard, ensuring high reliability and compatibility with stringent defense and aerospace requirements. Their 1/3‑turn bayonet locking mechanism provides fast, secure mating, reinforced by an audible click that confirms proper engagement—an important feature for technicians working in vibration‑prone or low‑visibility conditions.
Engineered for durability.
851 connectors support up to 500 mating cycles, making them suitable for long‑term deployment in equipment that undergoes frequent maintenance or module changes. They also exhibit strong environmental resilience, with salt spray resistance up to 500 hours, emphasizing their capability to withstand corrosive atmospheres such as marine or aerospace environments. The operating temperature range of –55°C to +125°C further highlights their suitability for extreme conditions, from high‑altitude aircraft to industrial control systems.
A wide range of configurations is available, including receptacles, plugs, environmental versions, hermetic versions, and PC‑tail termination options. The 851 Series also offers multiple shell finishes (such as cadmium or alternative platings), contact arrangements, and backshell configurations to fit diverse system integration needs. Their compliance with RoHS and REACH supports modern environmental and safety standards without compromising performance. As a result, Souriau 851 connectors remain a trusted choice for legacy systems and new designs alike, providing a balance of ruggedness, ease of use, and proven military‑grade specification alignment.
The Souriau 851 Series connectors are designed for rugged, high‑reliability environments, and their applications reflect the demanding industries they serve. Based on verified specifications, here are the key application areas:
1. Aeronautical and Aerospace Systems
These connectors are widely used in aircraft systems, avionics, and onboard electronics where reliability, vibration resistance, and secure bayonet coupling are essential. Their qualification to MIL‑DTL‑26482 Series I makes them suitable for mission‑critical aerospace operations.
2. Military and Defense Equipment
The 851 Series is extensively deployed in military communication systems, vehicles, field equipment, and ruggedized electronics. Their durability (500 mating cycles), corrosion resistance, and wide operating temperature range make them ideal for harsh battlefield environments.
3. Industrial Automation and Control
Thanks to their environmental sealing, robust construction, and resistance to contaminants, these connectors are used in industrial machinery, factory automation systems, and harsh production environments. Their secure 1/3‑turn bayonet lock ensures reliable connections during vibration and movement.
4. Harsh‑Environment Electronics
Any application requiring dependable connectivity in extreme temperatures, corrosive atmospheres, or high‑vibration settings—such as transportation, energy, and outdoor instrumentation—benefits from the 851 Series’ strong environmental performance, including 500‑hour salt‑spray resistance.
For a more detailed description of this connector series please see the manufacturers brochure which is available to download above.
For a personalised quotation on any of the part numbers seen in this range please complete the ‘Quick Quote’ form or simply call us on 01744 815001
- No. of Contacts: 2-61
- Locking Mechanism: Bayonet
- Contact Termination: Crimp, Solder, Dip-Solder
- Wire Gauge Max: 1.91mm²
- Cable Diameter Range: 4.00-33.08mm
- Connector Types: Cable to Panel, Cable to Cable
- Max. Voltage: UL, CSA, IEC Ratings Available on Request
- Max. Current: UL, CSA, IEC Ratings Available on Request
- Ingress Protection Max: IP65, IP67, IP68
- Pre-wired Options: On Request
Electrical Notes
See literature for derating curves
Safety Notes
Connectors must not be plugged or unplugged under load. Non-observance and improper use can result in personal injury
Ingress Protection Notes
Rating only guaranteed when locked to the proper mating half from the same manufacturer unless stated otherwise
Additional accessories may also be required to maintain IP rating in some instances
The Souriau 851 Series from Eaton is a family of circular connectors designed for demanding environments, widely used across aeronautical, military, and industrial applications. These connectors are fully qualified to the MIL‑DTL‑26482 Series 1 standard, ensuring high reliability and compatibility with stringent defense and aerospace requirements. Their 1/3‑turn bayonet locking mechanism provides fast, secure mating, reinforced by an audible click that confirms proper engagement—an important feature for technicians working in vibration‑prone or low‑visibility conditions.
Engineered for durability.
851 connectors support up to 500 mating cycles, making them suitable for long‑term deployment in equipment that undergoes frequent maintenance or module changes. They also exhibit strong environmental resilience, with salt spray resistance up to 500 hours, emphasizing their capability to withstand corrosive atmospheres such as marine or aerospace environments. The operating temperature range of –55°C to +125°C further highlights their suitability for extreme conditions, from high‑altitude aircraft to industrial control systems.
A wide range of configurations is available, including receptacles, plugs, environmental versions, hermetic versions, and PC‑tail termination options. The 851 Series also offers multiple shell finishes (such as cadmium or alternative platings), contact arrangements, and backshell configurations to fit diverse system integration needs. Their compliance with RoHS and REACH supports modern environmental and safety standards without compromising performance. As a result, Souriau 851 connectors remain a trusted choice for legacy systems and new designs alike, providing a balance of ruggedness, ease of use, and proven military‑grade specification alignment.
The Souriau 851 Series connectors are designed for rugged, high‑reliability environments, and their applications reflect the demanding industries they serve. Based on verified specifications, here are the key application areas:
1. Aeronautical and Aerospace Systems
These connectors are widely used in aircraft systems, avionics, and onboard electronics where reliability, vibration resistance, and secure bayonet coupling are essential. Their qualification to MIL‑DTL‑26482 Series I makes them suitable for mission‑critical aerospace operations.
2. Military and Defense Equipment
The 851 Series is extensively deployed in military communication systems, vehicles, field equipment, and ruggedized electronics. Their durability (500 mating cycles), corrosion resistance, and wide operating temperature range make them ideal for harsh battlefield environments.
3. Industrial Automation and Control
Thanks to their environmental sealing, robust construction, and resistance to contaminants, these connectors are used in industrial machinery, factory automation systems, and harsh production environments. Their secure 1/3‑turn bayonet lock ensures reliable connections during vibration and movement.
4. Harsh‑Environment Electronics
Any application requiring dependable connectivity in extreme temperatures, corrosive atmospheres, or high‑vibration settings—such as transportation, energy, and outdoor instrumentation—benefits from the 851 Series’ strong environmental performance, including 500‑hour salt‑spray resistance.
For a more detailed description of this connector series please see the manufacturers brochure which is available to download above.
For a personalised quotation on any of the part numbers seen in this range please complete the ‘Quick Quote’ form or simply call us on 01744 815001
- No. of Contacts: 2-61
- Locking Mechanism: Bayonet
- Contact Termination: Crimp, Solder, Dip-Solder
- Wire Gauge Max: 1.91mm²
- Cable Diameter Range: 4.00-33.08mm
- Connector Types: Cable to Panel, Cable to Cable
- Max. Voltage: UL, CSA, IEC Ratings Available on Request
- Max. Current: UL, CSA, IEC Ratings Available on Request
- Ingress Protection Max: IP65, IP67, IP68
- Pre-wired Options: On Request
Electrical Notes
See literature for derating curves
Safety Notes
Connectors must not be plugged or unplugged under load. Non-observance and improper use can result in personal injury
Ingress Protection Notes
Rating only guaranteed when locked to the proper mating half from the same manufacturer unless stated otherwise
Additional accessories may also be required to maintain IP rating in some instances
