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Cobalt Series Bulkhead Connector

Cobalt Series Bulkhead Connector

R965.25R1,544.40 ex vat

Cobalt Series bulkhead connector for use with Cobalt Series Cable Termination Kit or Blue Robotics T200 Thruster with Cobalt Connector.  Rated to 600 m depth, includes M10 X 1.5 nut.  3-pin, 4-pin, 6-pin, and 8-pin versions available.

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The Cobalt Series of dry-mate underwater connectors and cables from Blue Trail Engineering sets a new standard for miniature waterproof connectors.  Cobalt connectors offer the same reliability as larger subsea connectors, but at a fraction of the cost.  With 316 stainless steel shells and PEEK inserts, they withstand long-term use in seawater at depths up to 600 meters.  In spite of their compact size, Cobalt connectors can handle high currents (up to 20 amps on the 4-conductor version).  Connector shells are keyed and feature a scoop-proof design, allowing them to be mated blind with no possibility of pin damage.

Cobalt Series cables feature a simple, robust seal between the cable jacket and connector shell that eliminates the need for overmolding. A second hermetic seal between the connector pins and the connector shell provides redundancy. Because Cobalt connectors do not require overmolding, they cost less than traditional molded cables and connectors and eliminate the danger of leakage due to cathodic delamination. A simple, proven O-ring seal between the male and female connectors makes Cobalt connectors both easier to use and more reliable than wet-mate connectors. Perfect for space-limited applications, Cobalt connectors take up a fraction of the volume of the industry-standard Micro-Circular connectors.

The Cobalt bulkhead connector fits in the same 10-mm hole as Blue Robotics penetrators, making quick-connect and quick-disconnect possible with Blue Robotics thrusters, tethers, enclosures, lights, grippers, and other accessories.  A Cable termination kit allows the user to retrofit an existing Blue Robotics thruster with a Cobalt connector.

The Cobalt bulkhead connector is available in 3-pin, 4-pin, 6-pin and 8-pin versions.  It can be installed in the wall of any enclosure, provided that the enclosure has a smooth outer surface to seal against the connector’s O ring.  COBALT BULKHEAD CONNECTOR MUST BE USED WITH COBALT CABLE (sold separately).


Depth Rating 600 meters
Operating Temperature 0° C to +50° C
Maximum voltage 300 V
Rated current 3-conductor version: 12 amps

4-conductor version: 20 amps

6-conductor version: 5 amps

8-conductor version: 0.5 amps

Wire size 3-conductor version: 18 AWG

4-conductor version: 16 AWG

6-conductor version: 22 AWG

8-conductor version: 24 AWG

Wire stranding 3-conductor version: 19/30

4-conductor version: 19/29

6-conductor version: 19/34

8-conductor version: 7/32

Bulkhead connector shell 316 stainless steel
Bulkhead connector insert PEEK
Bulkhead connector pins gold-plated
Cable connector shell 316 stainless steel
Cable connector insert PEEK
Cable sockets tin-plated shell with gold-plated contact
Cable jacket 95A UV-stabilized polyurethane
wire insulation 3-, 4-, and 6-conductor versions: ETFE

8-conductor version: polyolefin

O ring nitrile
Locking sleeve acetal
Bulkhead connector threads M10 X 1.5
Bulkhead connector hex 16 mm
Locking sleeve threads M16 X 1.5
Cable outer diameter 3 and 6-conductor versions: 6.4 mm

4- and 8-conductor versions: 8.0 mm


Additional information


3 Pin, 4 Pin, 6 Pin, 8 Pin


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