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M24308/2-5Z – Amphenol PCD D-Sub 50-Socket Crimp Connector (Yellow Zinc)
Available now through the AirParts Aero marketplace.
Overview Section
The M24308/2-5Z is a high-performance, military-grade D-Subminiature Connector manufactured by Amphenol PCD. This connector is part of the MIL-DTL-24308 series, which defines the standard for rugged, reliable rectangular interconnects used throughout aerospace, defense, and high-reliability industrial systems.
This specific unit is a Shell Size 5 configuration featuring 50 Socket (S) positions in a high-density layout. The "Z" designation indicates the use of a Yellow Chromate over Zinc plating on the steel shell, providing exceptional corrosion resistance and electrical conductivity while being a more environmentally friendly alternative to traditional cadmium plating. Designed for crimp-style terminations, this connector allows for rapid, secure wire integration using standard M22520 crimp tooling.
Key Features Section
Military Standard Compliance: Fully qualified to MIL-DTL-24308 specifications, ensuring intermateability with all other compliant D-Sub connectors regardless of manufacturer.
High-Density 50-Pin Layout: Utilizes a Shell Size 5 footprint to provide 50 signal or low-power positions, optimizing space in avionics racks and control panels.
Yellow Zinc Finish: The "Z" finish provides a durable, conductive protective layer that resists oxidation and salt spray, essential for long-term reliability in non-pressurized aircraft bays.
Rear-Release Crimp Contacts: Designed for use with removable crimp contacts (M39029 style), allowing for easy circuit changes, repairs, and harness assembly without soldering.
Rugged Steel Shell: The steel construction provides mechanical strength and excellent EMI/RFI shielding when used with appropriate backshells.
Wide Operating Temperature: Engineered to perform consistently from -55°C to +125°C, covering the full spectrum of aerospace environmental extremes.
Technical Specifications Section
| Specification | Detail |
| Part Number | M24308/2-5Z |
| Manufacturer | Amphenol PCD |
| Shell Size | 5 |
| Contact Positions | 50 |
| Contact Gender | Socket (Female) |
| Termination Type | Crimp (Rear Release) |
| Shell Material | Steel |
| Plating | Yellow Chromate over Zinc (Z) |
| Mounting Style | Flange Mount (0.120" Thru-Hole) |
| Current Rating | 5 Amps (Standard for Size 20 Contacts) |
Aircraft Compatibility Section
The M24308/2-5Z is a foundational interconnect component found in the wiring harnesses of modern airframes in the AirParts Aero inventory:
Integrated Flight Decks: Used in the primary interface harnesses for Garmin G1000/G3000 and Honeywell Primus avionics suites.
Flight Management Systems (FMS): Standard connector for data transfer units and navigation computers in Bombardier and Gulfstream jets.
Mission Computers: Extensively utilized in tactical displays and sensor integration for special mission King Air and surveillance aircraft.
UAV Systems: A popular choice for ground control stations and on-board flight controllers due to its high pin density and vibration resistance.
Technical Applications & Safety
D-Sub connectors like the M24308/2-5Z are the workhorses of aircraft data bus architecture. In systems carrying ARINC 429, RS-232, or Ethernet signals, the integrity of the physical connection is paramount. A single loose pin or a corroded shell can lead to "intermittent" failures that are notoriously difficult to troubleshoot.
Safety Warning: Always use the correct M22520/2-01 crimp tool and appropriate positioners when assembling this connector. "Hand-squeezing" contacts with needle-nose pliers or using incorrect tools will lead to high-resistance joints and potential signal loss during high-vibration phases of flight.
Technical Engineering Insight
The engineering value of the M24308/2-5Z lies in its Shell Conductivity and Contact Retention. The yellow zinc (Z) finish is specifically designed to provide low electrical resistance across the shell-to-panel interface. This is critical for Lightning Protection (HIRF) and EMI shielding, as it ensures that stray electrical noise is shunted to the airframe ground rather than interfering with sensitive data signals.
Furthermore, the Rear-Release Retention System utilizes internal beryllium copper clips. These clips are designed to provide a specific "insertion force" and a high "extraction resistance," ensuring that even under the intense G-loads of tactical maneuvers, the contacts remain seated. Choosing the Amphenol M24308/2-5Z through AirParts Aero ensures that the dielectric inserts and shell tolerances meet the rigid requirements for high-density avionics integration.
Installation & Maintenance Addendum
Contact Selection: This connector shell is typically supplied without contacts (F0). Ensure you order the matching M39029/63-368 (Socket) contacts for a complete assembly.
Backshell Selection: For aerospace use, always pair this connector with a strain-relief backshell to protect the crimp joints from wire-weight fatigue.
Sealing: If used in a "Zone 2" (damp) environment, use a peripheral seal or environmental backshell to prevent moisture ingress into the contact cavities.
