D38999/26TB5SN Amphenol 5-Position Circular Plug
Manufacturer: Amphenol
Series: Tri-Start™ TV / MIL-DTL-38999 Series III
Package/Case: Shell Size 11, 5-Position Free-Hanging Circular Plug
Description: 5-position MIL-DTL-38999 Series III straight plug with female crimp contacts, Durmalon-finished aluminum shell and normal key orientation.
The D38999/26TB5SN from Amphenol Aerospace is a 5-position female circular plug qualified to MIL-DTL-38999 Series III. It features five gold-plated socket contacts, an aluminum shell with Amphenol’s RoHS-compliant Durmalon™ finish and a self-locking tri-start threaded coupling. It is designed for aerospace, military, marine and rugged electronic systems requiring a compact, environmentally resistant connector.
Specifications
| Parameter | Specification |
|---|---|
| Connector type | Straight circular plug |
| Contact gender | Female sockets |
| Number of positions | 5 |
| Contact arrangement | 5 × Size 20 contacts |
| Shell size / insert arrangement | 11-5 |
| MIL shell size | B |
| Termination | Crimp |
| Mounting type | Free-hanging / cable mount |
| Coupling mechanism | Tri-start threaded, self-locking |
| Shell material | Aluminum |
| Shell finish | Durmalon™ / nickel-PTFE |
| Contact material | Copper alloy |
| Contact finish | Gold |
| Typical current rating | Up to 7.5A per contact |
| Key orientation | N, normal |
| Shielding | Shielded |
| Environmental protection | Environment-resistant |
| Operating temperature | −65°C to +175°C |
| Qualification | MIL-DTL-38999 Series III |
| RoHS status | RoHS3 compliant |
| Applications | Aviation, marine and military |
| Part status | Active |
Features and Applications
The D38999/26TB5SN combines a compact 11-5 contact arrangement with a self-locking tri-start coupling system. It is suitable for carrying control signals and low-current power through a rugged cable interface.
Typical applications include:
Aircraft avionics
Radar and communication systems
Military ground vehicles
Unmanned aerial vehicles
Navigation and sensor equipment
Marine and shipboard electronics
Rugged industrial control systems
Portable test equipment
T Finish vs W and F Finishes
| Service class | Shell finish | Typical advantage |
|---|---|---|
| T | Durmalon / nickel-PTFE | RoHS-compliant corrosion resistance |
| W | Olive-drab cadmium | Traditional military finish |
| F | Electroless nickel | Conductivity and higher temperature capability |
Standard Version vs LC Version
D38999/26TB5SN: Connector assembly with socket contacts, depending on supplier configuration.
D38999/26TB5SN(LC): Plug housing supplied without contacts.
If an LC configuration is purchased, compatible Size 20 socket contacts must be ordered separately.
D38999/26TB5SN FAQ
Is D38999/26TB5SN a plug or receptacle?
It is a straight, free-hanging plug intended for cable mounting.
Does it use male or female contacts?
It uses five female socket contacts. The letter S identifies socket contacts.
What does the T service class mean?
It identifies an aluminum shell with Amphenol’s Durmalon nickel-PTFE finish.
What mates with D38999/26TB5SN?
A compatible receptacle must use the 11-5 arrangement, male pins and normal key orientation. D38999/20TB5PN is a corresponding wall-mount configuration.
Is this connector RoHS compliant?
The Amphenol D38999/26TB5SN is listed as RoHS3 compliant. Compliance documentation should still be requested for the specific production lot.
Can it replace D38999/26WB5SN?
The basic interface may be similar, but the shell finishes differ. Replacement requires approval against corrosion, grounding and environmental requirements.
Availability, Price and RFQ
DataStorageIC supplies Amphenol MIL-DTL-38999 connectors for prototype, maintenance and production requirements. Contact us for current information on D38999/26TB5SN stock, price, lead time, date code and documentation.
