D38999/26KG75PN Amphenol, D38999/26KG75PN Datasheet - Page 87

• Manufacturer Part Number: D38999/26KG75PN
• Description: Circular MIL / Spec Connectors 4P SIZE 21 STRAIGHT PLUG PIN
• Manufacturer: Amphenol
• Type: MIL-DTL38999 Circulrr
• Series: 38999 Seriesr

Specifications of D38999/26KG75PN

• Contact Gender: PIN
• Gender: PL
• Number Of Contacts: 4POS
• Shell Size / Insert Arrangement: 21-75
• Mounting Style: Cable
• Termination Method: Crimp
• Shell Plating: Stainless Steel
• Contact Plating: Gold
• Body Orientation: Straight
• Strain Relief: No
• Contact Classification: 4Coaxial
• Operating Temp Range: -65C to 200C
• Product Diameter (mm): 41.7mm
• Product Length (mm): 31.34mm
• Mil Type: MIL-DTL-38999 III
• Product Type: Connectors
• Contact Style: Pin (Male)
• Shell Style: Plug
• Shell Size: 21
• Insert Arrangement: 21-75
• Mating Style: Bayonet
• Lead Free Status / RoHS Status: Compliant

86
Amphenol
Contact Amphenol Aerospace for more information 800-678-0141 • www.amphenol-aerospace.com
What Determines the Diameter of the PCB Tail?
The outside diameter of the PCB tail is determined by the inside diameter of the plated through-hole
on the board or flex print. The standard or most popular diameters are shown in the chart on the next
page and are called out in the connector illustrations in this catalog.
Should PCB Tails be Gold Plated or Pre-tinned?
The standard PCB tails for MIL-DTL-38999 receptacles have gold plating,.00005 inches over nickel.
Amphenol can substitute a pre-tinned version of these tails to facilitate the termination process. This
pre-tinning is a 60/40 lead-tin alloy. Call Amphenol for further information on pre-tinning and any
other plating of contacts not covered in this catalog.
Would Flex Assemblies be Necessary or Beneficial for the Application?
Flex print can radically simplify the assembly of a connector to a system, as well as eliminate wiring
errors. Amphenol offers connector flex assemblies through APC, Amphenol Printed Circuits division.
Features and benefits of using flex technology include:
Should Other PC Tail Contact Types be Considered?
Press-Fit Connectors with compliant pins are available which engage the plated
through-holes in the board without the need for soldering. This optional contact style
offers the following benefits:
For more information on Press-Fit connectors with compliant pins see page 202.
Special Quadrax contacts have been designed with PC tails. Coax, twinax and triax
contacts can also have PC tails. Refer to Amphenol catalog 12-130. Go online at
www.amphenol-aerospace.com or consult Amphenol Aerospace for further information.
Flex Termination for Attachment to PC Boards
For availability of other contact diameters, consult Amphenol, Sidney NY.
• Available for MIL-DTL-38999 (including filter EMI/EMP types), circular connectors
• Sculptures
• Eliminates failures associated with crimped or solder-on contacts
• Geometrically fit tight space requirements and create a self-locking
• Improved board processing time
• Excellent temperature performance
• Ideal for low-lead applications
Standard diameters of PCB tails
terminal pad
Connector Series
MIL-DTL-38999
Aerospace
®
Flexible Circuits with built-in terminations
Size 16 Contact
.062 ±.001
Size 20 Contact
.019 ±.001
Guide to Selecting a PCB Circular
Quadrax PC Tail Contacts
Com bined with Standard PC
Tail Contacts
Size 22D Contact
.019 ±.001
Connector, Cont.
Compliant Pin Contacts in a
Bayonet 38999 Catalog
Special Design with
Longer PC Tails in a
38999 Composite Shell
Connector. Also shows
an Alignment Disc.
Quadrax Contacts with
PC Tails in a 38999
Connector with Special
Stand-off Shell