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The Miniature Hermetic Bulkhead Connector, 4-Pin Male is a glass-to-metal sealed miniature connector for pressure housings that must stay dry. The hermetic seal closes the bulkhead wall itself, while the outer IP68 interface provides the watertight mating for the external cable. The bulkhead pattern mounts through a housing wall: the wet side mates outside, the dry side is wired inside.
Basic Info.
| Model NO. | MC-4 |
| Interface Type | Circular / miniature |
| Gender | Male |
| Pin Count | 4-pin |
| IP Level | IP68 |
| Contact Material | Brass / copper alloy, gold plated |
| Housing Material | Machined metal housing with marine-grade plating |
| Application | ROV / AUV, subsea instrumentation, ocean engineering, underwater imaging |
| Certification | RoHS, CE, ISO9001 |
| Customization | Available — OEM/ODM (pin count, cable length, interface, marking) |
| MOQ | 1 piece (trial order welcome) |
| Transport Package | Carton with foam lining (export packing) |
| Lead Time | To be negotiated (per quantity and customization) |
| Shipping | DHL / FedEx / UPS / TNT express; air or sea freight for bulk orders |
Product Highlights
- IP68 sealing: O-ring face seal plus potted cable exit keep the dry side isolated from seawater.
- Hermetic barrier: glass-to-metal seal closes the housing wall, not just the mating face.
- Machined metal housing with marine-grade plating: built for continuous immersion and salt-water service.
- Gold-plated contacts: stable contact resistance and corrosion resistance over long deployments.
- Compact miniature footprint: fits tight instrument housings, manipulator wrists and small ROV pods.
- Mated pair or single end: supplied as plug, receptacle, bulkhead or ready-terminated cable assembly.
- OEM/ODM: pin count, cable length, shell material and marking built to your drawing.
Key Specifications
| Contact arrangement | 4-pin (Male) |
| Ingress protection | IP68 |
| Contact material | Gold-plated copper alloy |
| Housing | Machined metal housing with marine-grade plating |
| Insulator | PEEK / polymer (per model) |
| Coupling | Threaded coupling nut |
| Mounting | Bulkhead mount (wet-side mating) |
| Rated voltage / current | On request (per pin count and cable) |
| Operating depth | On request (confirm with your working depth) |
| Mating cycles | ≥500 (series standard) |
| Cable exit | Potted, jacket diameter per cable specification |
Structure & Sealing
Contacts are sealed into the shell with a glass-to-metal compression seal, so the housing wall itself is gas-tight. The external mating face adds an O-ring seal, and the rear is closed by a potted or welded header. This double barrier keeps the electronics dry even if the cable side is unmated underwater.
Applications
- ROV and AUV harnesses, manipulator and tooling interfaces
- Subsea sensors, cameras, sonar and imaging heads
- Oceanographic, geotechnical and environmental monitoring instruments
- Underwater lights, thrusters, actuators and pressure housings
Customization & OEM
- Pin count, contact type (power / signal / coax hybrid) and shell size built to order.
- Cable length, jacket material and pigtail or connectorised terminations to your drawing.
- Shell material options: brass, stainless steel 316L, titanium alloy; PEEK or rubber over-molding.
- Laser marking and custom packaging for OEM programs.
Packaging & Delivery
Each connector ships in an ESD-safe bag with a protective cap on the mating face, packed in a foam-lined export carton. Lead time depends on configuration and quantity — contact us for a current schedule. DHL / FedEx / air / sea freight supported.
FAQ
What is the MOQ?
MOQ is 1 piece for trial orders; volume pricing is available on request.
Can you supply a mated pair?
Yes — male plug, female receptacle, bulkhead and cable assemblies can be quoted as a set.
Can you build to my drawing?
Yes. Pin count, shell size, cable and termination can be customized; send your drawing for a proposal.
What is the lead time?
It depends on stock and customization level — contact us with your configuration for a firm date.
How is the connector sealed?
An O-ring face seal plus a potted cable exit; hermetic versions add a glass-to-metal seal.
How do you ship?
Express (DHL / FedEx / UPS / TNT) for small lots; air or sea freight for bulk orders.