D38999/26FE35PB Amphenol 55-Position Circular Connector
Manufacturer: Amphenol
Series: Tri-Start™ TV / MIL-DTL-38999 Series III
Package/Case: Shell Size 17, 55-Position Free-Hanging Circular Plug
Description: 55-position MIL-DTL-38999 Series III straight plug with male crimp contacts, electroless nickel-plated aluminum shell and alternate B key orientation.
The D38999/26FE35PB from Amphenol Aerospace is a 55-position straight circular plug qualified to MIL-DTL-38999 Series III. It features 55 gold-plated male crimp contacts, an aluminum shell with electroless nickel finish and alternate key orientation B. Its high-density contact arrangement is suitable for signal distribution in aerospace, avionics, military, marine and other harsh-environment systems.
Specifications
| Parameter | Specification |
|---|---|
| Connector type | Straight circular plug |
| Contact type | Male pins |
| Number of positions | 55 |
| Contact arrangement | 55 × Size 22D contacts |
| Shell size / insert arrangement | 17-35 |
| MIL shell size | E |
| 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 | Up to 5A per contact |
| Key orientation | B |
| Shielding | Shielded |
| Environmental protection | Environment-resistant |
| Operating temperature | −65°C to +200°C |
| Qualification | MIL-DTL-38999 Series III |
| Part status | Active |
Features and Applications
The D38999/26FE35PB combines a tri-start threaded coupling with a conductive electroless nickel finish and gold-plated crimp contacts. The construction supports reliable mating, EMI shielding and operation across a wide temperature range.
Typical applications include:
Aircraft avionics and flight-control systems
Radar and electronic warfare equipment
Military communication systems
Navigation and sensor interfaces
Unmanned aerial and ground vehicles
Marine and shipboard electronics
Rugged industrial control equipment
High-density instrumentation wiring
D38999/26FE35PB FAQ
Is D38999/26FE35PB a plug or receptacle?
It is a straight, free-hanging plug intended for cable mounting.
How many contacts does it have?
It has 55 male pin positions in the MIL-DTL-38999 17-35 insert arrangement.
What does the PB suffix mean?
The letter P indicates male pin contacts, while B identifies alternate key orientation B.
Can it mate with D38999/20FE35SN?
No. D38999/20FE35SN uses normal key orientation N. The mating receptacle must have the compatible B key orientation, such as D38999/20FE35SB.
What is the current rating?
The Size 22D contact configuration is commonly rated at up to 5A per contact. Actual allowable current depends on wiring, temperature, contact loading and system derating requirements.
Is D38999/26FE35PB environmentally sealed?
It is classified as environment-resistant when correctly assembled and mated with compatible components. Overall sealing also depends on the receptacle, backshell, cable termination and unused-contact sealing.
Availability, Price and RFQ
DataStorageIC supplies Amphenol Aerospace circular connectors for prototype, maintenance, repair and production requirements. Contact us for current information on D38999/26FE35PB stock, price, lead time, date code and documentation.
