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MS27473E12B4P Circular Connector for Marine Automation

>Number Of CoresNumber Of Cores 4 Pins
Contact DiameterContact Diameter(mm) 1.02 mm
IP RatingIP Rating IP67
Shell MaterialShell Material Aluminum Alloy
Temperature RangeTemperature Range -65°C to +175°C
TerminationTermination Crimp
Rated CurrentRated Current(A) 7.5A
Rated VoltageRated Voltage(Ac.V) 600V
Test VoltageTest Voltage(Ac.V)1Min 1800V
Insulation ResistanceInsulation Resistance (MΩ) ≥ 5000 MΩ
Contact ResistanceContact Resistance (MΩ) ≤ 3 mΩ
CertificationCertification CE, RoHS,BASCI,ISO9001
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MS27473E12B4P 4-Pin Circular Connector – Shell Size 12, Series II, IP67 Bayonet Plug


The MS27473E12B4P is a 4-pin MIL-DTL-38999 Series II circular plug designed for marine, shipboard, and industrial applications where reliability and compact size are essential. Its Shell Size 12 housing and bayonet-coupled pin contacts provide stable electrical connections in harsh and high-vibration environments.

Constructed with a corrosion-resistant aluminum alloy shell, this connector is suitable for saltwater exposure, high humidity, and industrial harsh conditions. The IP67-rated sealing ensures dependable operation against dust and water ingress, making it ideal for navigation, communication, and control systems.

The crimp termination offers consistent electrical performance while simplifying assembly and maintenance. Its compact 4-pin layout allows designers to integrate multiple signal lines in a small footprint without sacrificing durability or performance.

MIL spec connector


Key Advantages

Compact 4-Pin Configuration – Optimized for tight spaces and efficient wiring.

IP67 Waterproof and Dustproof – Reliable in marine and industrial environments.

Corrosion-Resistant Aluminum Shell – Ensures long-lasting durability.

Bayonet Coupling – Secure, vibration-resistant connection with easy mating/unmating.

Wide Temperature Range – Performs consistently from -65°C to +175°C.

military circular connector


The MS27473E12B4P is the ideal solution for applications requiring robust, high-reliability connectors in challenging environments, combining compact design with superior environmental resistance and stable electrical performance.

Item

Parameters

Number of Cores

6Pins

Gender

Male/Female

Housing Material

Aluminum Alloy

Cores Material

Brass Plated with Gold

Insulator Material

PEFT

Locking System

Bayonet Coupling

Temperature Range

-65°C to +175°C

Rated Current (A)

7.5A

Rated Voltage (AC.V)

600V

Test Voltage (AV.C)1Min

1800V

Insulation Resistance (㏁)

5000㏁

Contact  Resistance (㏁)

≤3㏁

Termination

Crimp


Related Products

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Related Resource


MIL-DTL-38999 connector
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Related Catalog
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MS27473 Military Connector
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Customer Reviews

   

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   Heavy-Duty Build!


MoonCoffee  2026-02-04

SP21 9-pin connectors are tough, durable, and suitable for demanding industrial setups.
   Industrial Reliability


PrimePath  2026-02-04

M12 Connectors perform consistently even in demanding working conditions.
   Secure Locking Design


SoftCompass  2026-02-04

SP16 5-pin connectors lock firmly and prevent accidental disconnection during operation.
   Reliable Panel Mount


DreamyMap  2026-02-04

SP20 panel-mount connectors install cleanly and provide secure, vibration-resistant contact.
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