D38999/26FJ11SN Amphenol 11-Position Circular Plug
Manufacturer: Amphenol
Series: Tri-Start™ TV / MIL-DTL-38999 Series III
Package/Case: Shell Size 25, 11-Position Free-Hanging Circular Plug
Description: 11-position MIL-DTL-38999 Series III straight plug with female crimp contacts, mixed signal and power contact arrangement, electroless nickel-plated aluminum shell and normal key orientation.
The D38999/26FJ11SN from Amphenol Aerospace is an 11-position straight circular plug qualified to MIL-DTL-38999 Series III. Its mixed-contact arrangement combines two Size 20 socket contacts with nine Size 10 power socket contacts, allowing signal and higher-current power circuits to pass through one rugged connector. It is designed for aerospace, military, marine and other harsh-environment applications.
Specifications
| Parameter | Specification |
|---|---|
| Connector type | Straight circular plug |
| Contact gender | Female sockets |
| Number of positions | 11 |
| Contact arrangement | 2 × Size 20 and 9 × Size 10 power |
| Shell size / insert arrangement | 25-11 |
| MIL shell size | J |
| Termination | Crimp |
| Mounting type | Free-hanging / cable mount |
| Coupling mechanism | Tri-start threaded |
| Shell material | Aluminum |
| Shell finish | Electroless nickel |
| Contact material | Copper alloy |
| Contact finish | Gold |
| Contact finish thickness | 50µin / 1.27µm |
| Current rating | 7.5A and 33A, depending on contact size |
| Key orientation | N, normal |
| Shielding | Shielded |
| Ingress protection | IP67 when properly mated |
| Operating temperature | −65°C to +200°C |
| Qualification | MIL-DTL-38999 Series III |
| Applications | Aerospace, aviation, marine and military |
| Part status | Active |
Features and Applications
The connector uses a tri-start threaded coupling system for rapid mating and secure retention under vibration. Its electroless nickel-plated aluminum shell provides mechanical protection, conductivity and EMI shielding while remaining lighter than comparable stainless-steel configurations.
Typical applications include:
Aircraft electrical and avionics systems
Radar and electronic warfare equipment
Military vehicle power distribution
Communication and navigation systems
Unmanned aerial and ground vehicles
Marine and shipboard electronics
Rugged power-control equipment
Engine and actuator interfaces
D38999/26FJ11SN FAQ
Is D38999/26FJ11SN a plug or receptacle?
It is a straight, free-hanging plug intended for cable mounting.
Does it use pin or socket contacts?
It uses female socket contacts. The letter S in the part number identifies the socket-contact configuration.
Are all 11 contacts the same size?
No. The 25-11 insert arrangement contains two Size 20 contacts and nine Size 10 power contacts.
What mates with D38999/26FJ11SN?
A compatible receptacle must use the 25-11 insert arrangement, male pin contacts and normal key orientation. D38999/20FJ11PN is a corresponding wall-mount configuration.
What is the difference between D38999/26FJ11SN and D38999/26FJ11SN-LC?
The standard assembly may include contacts, depending on the supplier configuration. The LC version identifies a connector housing supplied without contacts.
Is the connector waterproof?
It is rated IP67 when correctly terminated and fully mated with compatible components. Actual sealing also depends on the receptacle, backshell, cable entry and sealing of unused contact positions.
Availability, Price and RFQ
DataStorageIC supplies Amphenol Aerospace circular connectors for prototype, maintenance and production requirements. Contact us for current information on D38999/26FJ11SN stock, price, lead time, date code and documentation.
