AFD56-12-3SN Equivalent & Substitute Parts

Part Overview

The AFD56-12-3SN is a 3-position circular connector plug with female sockets, manufactured by TE Connectivity Deutsch Connectors. This connector features crimp termination, bayonet lock fastening, and gold-plated mating contacts rated for 13A continuous current. The part conforms to MIL-DTL-26482 G Series II specifications and is designed for applications in aviation, automotive, and military environments with an operating temperature range of -55°C to 200°C.

The AFD56-12-3SN is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from alternative manufacturers to maintain system compatibility and ensure continued supply chain access for replacement and new assembly requirements.

Key Parameters

Parameter	AFD56-12-3SN Value
Connector Type	Plug, Female Sockets
Number of Positions	3
Shell Size - Insert	12-3
Termination	Crimp
Fastening Type	Bayonet Lock
Mounting Type	Free Hanging (In-Line)
Current Rating	13A
Contact Finish - Mating	Gold
Shell Material	Aluminum
Shell Finish	Nickel
Operating Temperature	-55°C ~ 200°C
Ingress Protection	Environment Resistant
Contact Material	Copper Alloy
Orientation	N (Normal)
Primary Material	Metal

Substitute Part Grouping Explanation

Substitute parts for the AFD56-12-3SN are grouped into two functional categories based on connector configuration and application requirements:

Category 1: Direct Connector Substitutes (Complete Plug Assemblies)

Parts KPSE6E123S-DN-A34 and PT06SE-12-3S are complete 3-position circular connector plugs with female sockets and integrated crimp contacts. These parts maintain electrical and mechanical compatibility with the AFD56-12-3SN through the following critical parameters:

3-position configuration with 12-3 shell size and insert designation
Female socket connector type with crimp termination
Bayonet lock fastening mechanism
Free hanging (in-line) mounting orientation
13A current rating
Gold-plated mating contacts
Copper alloy contact material
Aluminum shell construction
Normal (N) orientation

Category 2: Connector Housing Substitutes (Plug Housings Without Contacts)

Parts PV75L12-3SL, PV76L12-3SL, and PV76W12-3SL are connector plug housings designed for female sockets. These parts provide mechanical and environmental compatibility but require separate contact installation. Compatibility is established through:

3-position configuration with 12-3 shell size and insert designation
Plug housing type for female sockets
Bayonet lock fastening mechanism
Free hanging (in-line) mounting orientation
Crimp contact type (contact size 16)
Aluminum alloy shell construction
Normal (N) orientation
Coupling nut feature for secure mating

Housing substitutes are applicable when connector shells require replacement or when system design permits separate contact procurement and assembly.

Parameter Comparison

Parameter	AFD56-12-3SN	KPSE6E123S-DN-A34	PT06SE-12-3S	PV75L12-3SL	PV76L12-3SL	PV76W12-3SL
Connector Type	Plug, Female Sockets	Plug, Female Sockets	Plug, Female Sockets	Plug Housing	Plug Housing	Plug Housing
Number of Positions	3	3	3	3	3	3
Shell Size - Insert	12-3	12-3	12-3	12-3	12-3	12-3
Termination / Contact Type	Crimp	Crimp	Crimp	Crimp	Crimp	Crimp
Fastening Type	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Current Rating (Amps)	13A	13A	13A	N/A (Housing Only)	N/A (Housing Only)	N/A (Housing Only)
Contact Finish - Mating	Gold	Gold	Gold	N/A (Housing Only)	N/A (Housing Only)	N/A (Housing Only)
Shell Material	Aluminum	Aluminum Alloy	Aluminum	Aluminum Alloy	Aluminum Alloy	Aluminum Alloy
Shell Finish	Nickel	Nickel	Olive Drab Chromate over Cadmium	Electroless Nickel	Electroless Nickel	Chromate over Cadmium
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	N/A (Housing Only)	N/A (Housing Only)	N/A (Housing Only)
Orientation	N (Normal)	N (Normal)	N (Normal)	N (Normal)	N (Normal)	N (Normal)
Operating Temperature	-55°C ~ 200°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 200°C	-55°C ~ 200°C	-55°C ~ 200°C
Ingress Protection	Environment Resistant	IP67 - Dust Tight, Waterproof	Environment Sealed	Environment Resistant	Environment Resistant	Environment Resistant
Shielding	Not Specified	Unshielded	Unshielded	Shielded	Unshielded	Unshielded
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

For Direct Connector Replacement (Complete Plug Assemblies):

KPSE6E123S-DN-A34 (ITT Cannon, LLC) is the preferred direct substitute for the AFD56-12-3SN. This connector maintains all critical electrical and mechanical parameters including 3-position configuration, 12-3 shell size, crimp termination, bayonet lock fastening, 13A current rating, and gold-plated mating contacts. The KPSE6E123S-DN-A34 is currently active in production with 780 units in stock. The part provides enhanced ingress protection (IP67 rating) compared to the AFD56-12-3SN and is RoHS compliant. Operating temperature is limited to -55°C to 125°C, which is lower than the AFD56-12-3SN specification of -55°C to 200°C. This temperature limitation must be evaluated against specific application requirements.

PT06SE-12-3S (Amphenol Industrial Operations) is an alternative direct substitute conforming to MIL-DTL-26482 Series I specifications. This connector maintains all critical parameters and is currently active with 1214 units in stock. The PT06SE-12-3S features environment-sealed ingress protection and operates across -55°C to 125°C. The shell finish is olive drab chromate over cadmium, which differs from the AFD56-12-3SN nickel finish. This part is RoHS non-compliant and contains cadmium, requiring evaluation against regulatory and environmental requirements for the intended application.

For Connector Housing Replacement (Plug Housings Without Contacts):

PV75L12-3SL (ITT Cannon, LLC) provides a shielded connector housing option with electroless nickel finish. This housing maintains mechanical compatibility and operates across -55°C to 200°C, matching the AFD56-12-3SN temperature range. The shielded configuration provides electromagnetic interference protection. Contacts are not included and must be procured separately.

PV76L12-3SL (ITT Cannon, LLC) provides an unshielded connector housing with electroless nickel finish. This housing maintains mechanical compatibility and operates across -55°C to 200°C. The unshielded configuration is suitable for applications without electromagnetic interference requirements. Contacts are not included and must be procured separately.

PV76W12-3SL (ITT Cannon, LLC) provides an unshielded connector housing with chromate over cadmium finish in olive drab color. This housing maintains mechanical compatibility and operates across -55°C to 200°C. The chromate over cadmium finish matches the PT06SE-12-3S specification. Contacts are not included and must be procured separately. This part is RoHS non-compliant.

All substitute parts are designated as ECCN EAR99 and share the same HTSUS classification as the AFD56-12-3SN, confirming regulatory alignment for export and trade purposes.

Frequently Asked Questions (FAQ)

Q: Can KPSE6E123S-DN-A34 be used as a direct replacement for AFD56-12-3SN in all applications?

A: KPSE6E123S-DN-A34 maintains electrical and mechanical compatibility for connector function. However, the operating temperature range differs: KPSE6E123S-DN-A34 operates from -55°C to 125°C while AFD56-12-3SN operates from -55°C to 200°C. Applications requiring operation above 125°C require evaluation of alternative substitutes or confirmation that the lower temperature rating is acceptable for the specific use case.

Q: What is the difference between direct connector substitutes and housing substitutes?

A: Direct connector substitutes (KPSE6E123S-DN-A34 and PT06SE-12-3S) are complete assemblies with integrated female sockets and crimp contacts ready for installation. Housing substitutes (PV75L12-3SL, PV76L12-3SL, PV76W12-3SL) are connector shells only and require separate procurement and installation of crimp contacts. Housing substitutes are used when connector shells require replacement or when system design permits separate contact sourcing.

Q: Are all substitute parts RoHS compliant?

A: No. KPSE6E123S-DN-A34 is RoHS compliant. PT06SE-12-3S, PV75L12-3SL, PV76L12-3SL, and PV76W12-3SL are RoHS non-compliant. Applications subject to RoHS requirements must use KPSE6E123S-DN-A34 or confirm exemption applicability for non-compliant parts.

Q: What is the significance of shell finish differences between substitutes?

A: Shell finish affects corrosion resistance and environmental performance. AFD56-12-3SN features nickel finish. KPSE6E123S-DN-A34 features nickel finish. PT06SE-12-3S features olive drab chromate over cadmium. PV75L12-3SL features electroless nickel. PV76L12-3SL features electroless nickel. PV76W12-3SL features chromate over cadmium. Nickel and electroless nickel finishes provide superior corrosion resistance in most environments. Chromate over cadmium finishes provide enhanced corrosion resistance in specific aerospace and military applications but contain cadmium, which is restricted under RoHS and REACH regulations.

Q: Can PT06SE-12-3S be used in applications requiring RoHS compliance?

A: No. PT06SE-12-3S is RoHS non-compliant and contains cadmium in the shell finish. Applications requiring RoHS compliance must use KPSE6E123S-DN-A34 or confirm that exemptions apply to the specific application and regulatory jurisdiction.

Q: What is the difference between shielded and unshielded housing options?

A: PV75L12-3SL is shielded and provides electromagnetic interference (EMI) protection. PV76L12-3SL and PV76W12-3SL are unshielded and do not provide EMI protection. Shielded housings are required for applications sensitive to electromagnetic interference. Unshielded housings are suitable for applications without EMI requirements and offer reduced cost and weight.

Q: Are substitute parts available in the same packaging as AFD56-12-3SN?

A: AFD56-12-3SN packaging information is not specified in the provided data. All substitute parts are available in bulk packaging. Specific packaging requirements (tape and reel, trays, or other formats) must be confirmed with the respective manufacturers or distributors.

Q: What is the current rating for housing substitutes?

A: Housing substitutes (PV75L12-3SL, PV76L12-3SL, PV76W12-3SL) are connector shells without integrated contacts. Current rating is determined by the separately procured crimp contacts, not the housing. Contact selection must ensure that the contact current rating meets or exceeds the 13A requirement of the AFD56-12-3SN.

Q: Do all substitute parts support bayonet lock fastening?

A: Yes. All substitute parts (KPSE6E123S-DN-A34, PT06SE-12-3S, PV75L12-3SL, PV76L12-3SL, PV76W12-3SL) feature bayonet lock fastening, maintaining mechanical compatibility with mating connectors designed for the AFD56-12-3SN.

Q: What is the significance of the contact size specification in housing substitutes?

A: Housing substitutes specify contact size 16 for crimp contacts. This designation indicates the physical dimensions and current-carrying capacity of the contacts. Replacement contacts must match contact size 16 to ensure proper fit and electrical performance within the connector housing.

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