AFD57-20-39SN Equivalent & Substitute Parts

Part Overview

The AFD57-20-39SN is a 39-position circular connector plug with female sockets manufactured by TE Connectivity Deutsch Connectors. This connector features crimp termination, bayonet lock fastening, and is designed for free-hanging in-line mounting applications. The part operates across a temperature range of -55°C to 200°C and is rated for 7.5A and 13A current capacity. The AFD57-20-39SN is discontinued at DiGi Electronics, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility for ongoing system support and new production requirements.

Substiute Parts

AFD57-20-39SN

TE Connectivity Deutsch ConnectorsIn Stock: 741AFD57-20-39SN Datasheet

Current PartRFQ

PV75L20-39SL

ITT Cannon, LLCIn Stock: 804PV75L20-39SL Datasheet

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PV75W20-39S

ITT Cannon, LLCIn Stock: 1252PV75W20-39S Datasheet

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PV76L20-39SL

ITT Cannon, LLCIn Stock: 1189PV76L20-39SL Datasheet

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PV76W20-39SL

ITT Cannon, LLCIn Stock: 1013PV76W20-39SL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AFD57-20-39SN circular connector is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 39
• Shell Size - Insert: 20-39
• Mounting Type: Free Hanging (In-Line)
• Fastening Type: Bayonet Lock
• Orientation: N (Normal)
• Termination: Crimp
• Operating Temperature Range: -55°C ~ 200°C
• Insert Material: Plastic
• Ingress Protection: Environment Resistant

Acceptable Variation Parameters:

• Shell Material: Aluminum or Aluminum Alloy
• Shell Finish: Nickel, Electroless Nickel, or Chromate over Cadmium
• Housing Color: Silver or Olive Drab
• Shielding: Shielded or Unshielded
• Contact Finish - Mating: Gold or equivalent
• Connector Type: Plug Housing for Female Sockets

The substitute parts listed below maintain compatibility through identical position count, shell size, mounting configuration, and operating temperature specifications. Variations in shell finish and shielding characteristics are acceptable based on application requirements and environmental conditions.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PV75L20-39SL

The PV75L20-39SL from ITT Cannon, LLC is the most direct substitute for the AFD57-20-39SN. This part maintains identical specifications across all critical parameters including 39-position configuration, 20-39 shell size, free-hanging in-line mounting, bayonet lock fastening, crimp termination, and -55°C to 200°C operating temperature range. The PV75L20-39SL features shielding equivalent to the original part and operates with the same environmental resistance rating. This part is currently active in production with 777 units in stock, providing immediate availability for replacement and new applications.

Secondary Substitutes: PV76L20-39SL and PV76W20-39SL

The PV76L20-39SL and PV76W20-39SL are functionally equivalent to the AFD57-20-39SN with one critical difference: these parts feature unshielded construction compared to the shielded design of the original connector. Selection of these alternatives is appropriate only when electromagnetic shielding is not required by the application specification. Both parts maintain all other critical parameters including position count, shell size, mounting type, fastening mechanism, and operating temperature range. The PV76L20-39SL provides electroless nickel finish with silver housing, while the PV76W20-39SL offers chromate over cadmium finish with olive drab housing for enhanced corrosion resistance in specific environmental conditions.

Limited Information Substitute: PV75W20-39S

The PV75W20-39S is listed as an available substitute; however, critical technical specifications including number of positions, shell size, mounting type, termination method, and operating temperature are not provided in the available documentation. This part cannot be confirmed as a direct equivalent without complete specification data.

All substitute parts maintain RoHS non-compliant status and MSL 1 (Unlimited) rating consistent with the original AFD57-20-39SN component.

Frequently Asked Questions (FAQ)

Q: Can PV76L20-39SL or PV76W20-39SL be used as direct replacements for AFD57-20-39SN in all applications?

A: These parts are mechanically and electrically compatible with the AFD57-20-39SN in applications where electromagnetic shielding is not required. The primary difference is the absence of shielding in the PV76 series. If the original application requires shielded construction, the PV75L20-39SL is the appropriate substitute.

Q: What is the difference between PV75L20-39SL and PV76L20-39SL?

A: Both parts are identical in all critical parameters except shielding. The PV75L20-39SL is shielded, while the PV76L20-39SL is unshielded. Both feature electroless nickel finish and silver housing color.

Q: Why does PV76W20-39SL have a different housing color?

A: The PV76W20-39SL features olive drab housing color with chromate over cadmium shell finish, providing enhanced corrosion resistance for military and aerospace applications. This is an acceptable variation for applications requiring this specific environmental protection level.

Q: Are all substitute parts currently in production?

A: Yes, PV75L20-39SL, PV76L20-39SL, and PV76W20-39SL are all active products from ITT Cannon, LLC with current inventory availability. The original AFD57-20-39SN is discontinued at DiGi Electronics.

Q: What is the significance of the contact size notation "16 (2), 20 (37)" in the substitute parts?

A: This notation indicates that the connector accommodates two contacts of size 16 and thirty-seven contacts of size 20 within the 39-position configuration.

Q: Are the substitute parts compatible with the same crimp tools and contact sizes as the AFD57-20-39SN?

A: The substitute parts use crimp termination with the same contact size distribution. Verification of crimp tool compatibility with the specific contact sizes is required during implementation.

Q: What is the difference in shell finish between the substitute options?

A: PV75L20-39SL uses electroless nickel finish, PV76L20-39SL uses electroless nickel finish, and PV76W20-39SL uses chromate over cadmium finish. Electroless nickel provides uniform corrosion resistance, while chromate over cadmium offers enhanced protection in severe environmental conditions.

Q: Can PV75W20-39S be used as a substitute without complete specification data?

A: The PV75W20-39S cannot be confirmed as a direct equivalent due to incomplete technical documentation. Critical parameters including position count, shell size, and operating temperature are not specified. Obtain complete specification data from the manufacturer before selecting this part for substitution.