Amphenol RF 122391 TNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 122391 is an active TNC connector plug designed for 75-ohm coaxial cable applications. This male pin connector features crimp termination for both center contact and shield, supporting frequencies up to 1 GHz with a maximum voltage rating of 500 V. The connector is compatible with RG-59 and Belden cable series including 1426A, 1505A, 8281, 9100, and 9278. Identification of equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain compatibility across production batches while preserving electrical and mechanical performance specifications.

Key Parameters

Parameter	Specification
Connector Style	TNC
Connector Type	Plug, Male Pin
Impedance	75 Ohms
Contact Termination	Crimp
Shield Termination	Crimp
Mounting Type	Free Hanging (In-Line)
Frequency - Max	1 GHz
Voltage Rating	500 V
Insertion Loss	0.18 dB
Mating Cycles	500
Cable Group Compatibility	RG-59, Belden 1426A, 1505A, 8281, 9100, 9278

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 122391 are identified based on strict electrical and mechanical parameter matching. The primary substitution criterion is functional equivalence across all critical parameters: connector style (TNC), connector type (Plug, Male Pin), impedance (75 Ohms), termination method (Crimp for both center contact and shield), mounting configuration (Free Hanging In-Line), frequency capability (1 GHz maximum), voltage rating (500 V), insertion loss (0.18 dB), mating cycle rating (500), and cable group compatibility (RG-59 and Belden series).

Substitute parts must maintain identical electrical performance characteristics and physical compatibility with the specified cable groups. All substitute parts listed are active products with current manufacturing status and equivalent compliance certifications (ROHS3 Compliant, REACH Affected).

Parameter Comparison

Parameter	Amphenol RF 122391	Amphenol RF 122426
Manufacturer Part Number	122391	122426
Manufacturer	Amphenol RF	Amphenol RF
Category	Coaxial Connectors (RF)	Coaxial Connectors (RF)
Connector Style	TNC	TNC
Connector Type	Plug, Male Pin	Plug, Male Pin
Contact Termination	Crimp	Crimp
Shield Termination	Crimp	Crimp
Impedance	75 Ohms	75 Ohms
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)
Fastening Type	Threaded	Threaded
Frequency - Max	1 GHz	1 GHz
Number of Ports	1	1
Housing Color	Silver	Silver
Center Contact Material	Brass	Brass
Body Material	Brass	Brass
Body Finish	Nickel	Nickel
Center Contact Plating	Gold	Gold
Dielectric Material	Polyoxymethylene (POM) Acetal	Polyoxymethylene (POM) Acetal
Voltage Rating	500 V	500 V
Mating Cycles	500	500
Insertion Loss	0.18 dB	0.18 dB
Cable Group Compatibility	RG-59, Belden 1426A, 1505A, 8281, 9100, 9278	RG-59, Belden 1426A, 1505A, 8281, 9100, 9278
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Affected	REACH Affected
ECCN	EAR99	EAR99
HTSUS	8536.69.4010	8536.69.4010

Engineering Selection Recommendations

Both the Amphenol RF 122391 and Amphenol RF 122426 are active products with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain considerations rather than performance differentiation.

The Amphenol RF 122426 is available with 1120 pieces in current inventory, while the Amphenol RF 122391 has 1056 pieces in stock. Both parts carry equivalent compliance certifications: ROHS3 Compliant, REACH Affected status, and EAR99 ECCN classification. Both maintain MSL Level 1 (Unlimited) moisture sensitivity rating.

For applications requiring 75-ohm TNC male plug connectors with crimp termination, free-hanging in-line mounting, and compatibility with RG-59 and Belden cable series, either part number satisfies the electrical and mechanical requirements without performance compromise.

Frequently Asked Questions (FAQ)

Q: Are the Amphenol RF 122391 and 122426 electrically interchangeable?

A: Yes. Both parts are specified identically across all electrical parameters including 75-ohm impedance, 1 GHz maximum frequency, 500 V voltage rating, 0.18 dB insertion loss, and 500 mating cycle rating.

Q: Can these connectors be used with different cable types?

A: Both parts are compatible exclusively with RG-59 and Belden cable series 1426A, 1505A, 8281, 9100, and 9278. Use only within this specified cable group.

Q: What is included with each connector?

A: Each part includes three components: one connector body, one center contact, and one ferrule.

Q: Are there differences in material composition between the two parts?

A: No. Both parts feature brass body and center contact materials with nickel body finish and gold center contact plating. Dielectric material is polyoxymethylene (POM) acetal in both cases.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 122391 and 122426 are ROHS3 Compliant, REACH Affected, and classified as EAR99 for export control purposes. Both carry MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: What is the difference between these two part numbers?

A: The parts are functionally equivalent. The difference is the base product number (1223 for 122391 versus 1224 for 122426), which may reflect different manufacturing batches or internal Amphenol RF product line organization. All specified electrical and mechanical parameters are identical.

Q: Can these connectors be used in high-frequency applications?

A: Both connectors support frequencies up to 1 GHz maximum. Applications requiring higher frequency operation require alternative connector designs.

Q: What termination method is used for these connectors?

A: Both parts use crimp termination for the center contact and shield. Soldering is not applicable to these connector designs.

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