Top 10 Souriau-Sunbank by Eaton Parts Every Hardware Engineer Should Know
1. 8D 5M — The MIL-DTL-38999 Series III Standard
Type: Circular connector, MIL-DTL-38999 Series III
Shell Styles: Plug, receptacle, jam nut, PCB mount
Shell Sizes: 9–25
Contact Arrangements: 3–128 contacts
The 8D series is Souriau's version of the most popular mil-spec circular connector standard in the world. You get 100% scoop-proof mating — contacts can't be damaged even in blind mating — EMI shielding of 50 dB at 100 MHz, and IP67 sealing when mated. The 8D-5M series uses stainless steel shells and offers up to 5,000 mating cycles. If you're designing military avionics, ground vehicles, or naval systems, the 8D will be on your interconnect drawing.
Why it matters: Unlike some manufacturers' 38999 offerings, Souriau's 8D series is fully intermateable and intermountable with all MIL-DTL-38999 Series III connectors — and lead times are often shorter.
2. UTO 6 — Rectangular Power Connector for Heavy Equipment
Type: Rectangular power connector
Current Rating: Up to 200 A per contact
Voltage Rating: 600 V
Contact Size: 6 mm diameter
The UTO series is Souriau's solution for high-current connections in harsh environments — battery packs, traction motors, diesel generator sets, and power distribution units. The UTO 6 contact carries a true 200 A continuous (with proper cable sizing), and the connector seals to IP68/69K when mated. The locking clip gives audible and tactile feedback — you know it's seated without a visual check.
3. UTS 6 — Circular Push-Pull for Industrial Applications
Type: Circular push-pull connector
IP Rating: IP68/69K
Shell Sizes: 8, 10, 12, 14, 16, 18, 20, 22
Contact Arrangements: 2–19 contacts
The UTS (Universal TRIM TRIO Subminiature) series is Souriau's answer to the industrial need for a rugged, quick-mate circular connector without a threaded coupling. Push it home and it engages; pull the collar and it releases. With TRIM TRIO interchangeable contacts you can mix signal, power, coax, and fluidic contacts in the same shell. Operating range is -55°C to +125°C. You'll find it on outdoor sensors, robotic arms, and industrial networking.
4. UTG 6 — Threaded Circular for Harsh Environments
Type: Circular threaded connector
IP Rating: IP67/68
Shell Sizes: 10–22
Contact Size: 20–12 AWG
The UTG series uses a standard threaded coupling with an O-ring seal — slightly more reliable than the UTS push-pull, at the cost of a slower mate cycle. For constant vibration — rail signaling, mining equipment, marine navigation — we usually reach for the threaded UTG over the push-pull; a thread doesn't accidentally back out on its own. It's also less expensive than mil-spec alternatives while meeting equivalent environmental performance for many industrial applications.
5. UT0 6S — High-Density Rectangular Connector
Type: Rectangular connector, EN3645 equivalent
Contact Arrangements: Up to 109 contacts
Contact Size: 20–12 AWG
When you need maximum contact density in a rectangular shell — vehicle control modules, avionics LRUs, or communication racks — the UT0 series packs up to 109 contacts into a single housing. It is mechanically interchangeable with EN3645 connectors. The retention system uses a metal clip rather than plastic, which is why it keeps working at +200°C.
6. D-Sub 723 Series — High-Reliability D-Subminiature
Type: D-sub miniature connector
Contact Arrangements: 9, 15, 25, 37, 50
Current Rating: 5–40 A depending on contact size
Plating: Gold over nickel
Souriau's 723 series D-subs are not your typical computer-style D-sub connectors. They feature a rugged one-piece shell, high-retention contact clips, and the ability to mix standard signal contacts with coaxial, high-voltage, and pneumatic contacts in the same shell. Need a D-sub that survives 500+ mating cycles on a factory floor? This is the series.
7. Trim Trio Contact System — The Universal Contact Platform
Type: Modular contact system
Contact Sizes: AWG 20–14 (standard), AWG 12 (power), coax/high-voltage
Finishes: Gold, tin
TRIM TRIO is one of Souriau's smartest design decisions. One contact family works across the entire UTS, UTG, UT0, and some D-sub families, so you can stock one contact type and use it with multiple shell families. The stamped-and-formed contacts are designed for high-speed automated crimping, and the closed-entry socket design prevents probe damage during mating. Standardize on TRIM TRIO and your assembly line can change shells without retooling the crimp setup.
8. 8D0 7W4 — Combo Hybrid Connector
Type: MIL-DTL-38999 with mixed contacts
Shell Size: 11–25
Contact Mix: Signal + power + coax + fibre optic in one shell
The 8D0 series lets you route multiple signal types through a single 38999-style shell. A typical configuration might carry 4 power pins (20 A each), 12 signal contacts, and 2 coax lines in one connector. That saves panel space and reduces cabling complexity. Common in radar systems, vehicle control units, and military radios.
9. SMD Series — Micro-D Connectors for Tight Spaces
Type: Micro-D rectangular connector
Contact Pitch: 1.27 mm (0.05")
Contact Arrangements: 9–51
Current Rating: 3 A per contact
When you need mil-spec reliability in a tiny footprint, Souriau's SMD Micro-D series delivers. These connectors meet MIL-DTL-83513 and are sealed to IP67 when mated. Use them for UAV payloads, portable radios, and helmet-mounted displays where every gram counts. The metal shell provides EMI shielding, and the twist-pin contacts survive 500+ cycles.
10. UTS On-Shore Rated (OSR) — Saltwater-Proof for Marine Applications
Type: Sealed push-pull circular connector
Rating: IP69K, saltwater immersion
Shell Sizes: 10–22
Contact Plating: Gold on stainless steel
The UTS OSR variant is a special version of the standard UTS, designed for direct saltwater exposure. The shell is machined from 316L stainless steel, and the sealing system is tested to IEC 60529 for extended immersion. Deck equipment, underwater sensors, offshore instrumentation — with OSR you can skip the separate protective overmold entirely.
Sourcing Souriau-Sunbank by Eaton Connectors
Because Souriau-Sunbank by Eaton connectors span such a wide range — standard industrial through mil-spec aerospace — availability varies significantly by series. In our experience, UTS and UTG are generally well-stocked; 8D and UTO often need a quote. Check current stock and get competitive pricing at partscubeglobal.com, or use the BOM upload tool to price out a full connector BOM in one pass.
References
Written by Marcus Chen
Senior Procurement Engineer · Shenzhen, China
Marcus has spent 11 years in electronic component procurement, covering semiconductors, passives and connectors for industrial and automotive customers. He joined PartsCube Global in 2024 after running sourcing for a Shenzhen EMS company.
View all articles by Marcus →Need help sourcing these components?
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