Amphenol RF 031-2351 TNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-2351 is a TNC connector plug designed for 50-ohm RF applications. This male pin connector features crimp termination for both center contact and shield, supporting cable groups including RG-58 variants, RG-141, and LMR-195. The connector operates across a frequency range up to 11 GHz with a maximum operating temperature of 165°C and is rated for 500 mating cycles. The part is currently in active production status with ROHS3 compliance and REACH affected designation. Substitute parts are necessary when specific cable group compatibility, mounting configuration, or product availability requirements differ from the original specification.

Substiute Parts

031-2351

Amphenol RFIn Stock: 1056031-2351 Datasheet

Current PartRFQ

5225555-2

TE Connectivity AMP ConnectorsIn Stock: 9985225555-2 Datasheet

SimilarRFQ

5225555-5

TE Connectivity AMP ConnectorsIn Stock: 12625225555-5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Amphenol RF 031-2351 is determined by strict equivalence across core electrical and mechanical parameters. The following parameters must remain constant for valid substitution:

• Connector style (TNC)
• Connector type (Plug, Male Pin)
• Impedance (50 Ohms)
• Contact and shield termination method (Crimp)
• Frequency capability (11 GHz maximum)
• Operating temperature range (-65°C to 165°C)
• Voltage rating (500 V)
• Mating cycle rating (500)
• Dielectric material (PTFE)
• Body material and finish (Brass, Nickel)

Substitute parts identified are TE Connectivity AMP Connectors models 5225555-2 and 5225555-5. These substitutes maintain electrical equivalence and mechanical compatibility while differing in mounting configuration (free hanging in-line versus unspecified mounting type) and supported cable groups. The 5225555-2 is obsolete but remains available in inventory. The 5225555-5 is active production and ROHS3 compliant, matching the original part's compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: TE Connectivity 5225555-5

The TE Connectivity 5225555-5 is the preferred substitute for new designs and production applications. This part maintains active production status, matching the Amphenol RF 031-2351 in ROHS3 compliance and REACH affected designation. Both parts carry identical electrical specifications, operating parameters, and material composition. The 5225555-5 is packaged in bulk and supports RG-141 and RG-141A cable groups. Current inventory of 1,172 pieces ensures supply continuity.

Secondary Selection: TE Connectivity 5225555-2

The TE Connectivity 5225555-2 is electrically and mechanically equivalent but carries obsolete product status. This part is suitable only for replacement or repair of existing installations where the original part is no longer available. The 5225555-2 supports RG-58A and RG-58C cable groups, differing from the primary part's cable compatibility. REACH status is vendor undefined, requiring verification for applications subject to REACH regulations. Current inventory of 984 pieces is available.

Cable Group Compatibility Consideration

The Amphenol RF 031-2351 supports a broader cable group range (RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907) compared to the substitute parts. The 5225555-5 supports RG-141 and RG-141A, while the 5225555-2 supports RG-58A and RG-58C. Selection must account for the specific cable type used in the application.

Frequently Asked Questions (FAQ)

Q: Can TE Connectivity 5225555-5 directly replace Amphenol RF 031-2351 in all applications?

A: The 5225555-5 is electrically and mechanically equivalent across all core parameters including impedance, frequency response, operating temperature, voltage rating, and mating cycles. However, cable group compatibility must be verified. The 5225555-5 supports RG-141 and RG-141A cables, while the original part supports a broader range including RG-58 variants. Substitution is valid only when the application uses RG-141 or RG-141A cables.

Q: What is the difference between the two TE Connectivity substitutes?

A: Both 5225555-2 and 5225555-5 are electrically identical TNC male plug connectors with 50-ohm impedance and crimp termination. The primary differences are: (1) Product status—5225555-2 is obsolete while 5225555-5 is active production; (2) Cable group support—5225555-2 supports RG-58A and RG-58C, while 5225555-5 supports RG-141 and RG-141A; (3) Compliance—5225555-5 is ROHS3 compliant and REACH affected, matching the original part, while 5225555-2 has vendor-undefined REACH status; (4) Packaging—5225555-5 is supplied in bulk.

Q: Is the Amphenol RF 031-2351 still in production?

A: Yes, the Amphenol RF 031-2351 is active production status with 1,027 pieces currently in stock. Substitution is necessary only when the original part becomes unavailable or when specific cable group or mounting requirements necessitate an alternative.

Q: What does "free hanging (in-line)" mounting mean for the TE Connectivity substitutes?

A: Free hanging (in-line) mounting indicates the connector is designed for direct cable attachment without panel or chassis mounting hardware. This differs from the Amphenol RF 031-2351, which does not specify a mounting type. Verify that the application does not require panel-mount or bulkhead configuration before substituting.

Q: Are there compliance differences between the original part and substitutes?

A: The Amphenol RF 031-2351 and TE Connectivity 5225555-5 are both ROHS3 compliant and REACH affected. The 5225555-2 is RoHS compliant (not ROHS3) and has vendor-undefined REACH status. For applications requiring ROHS3 and REACH compliance, the 5225555-5 is the appropriate substitute. The 5225555-2 is suitable only for legacy systems or applications without these compliance requirements.

Q: What is the insertion loss specification for the substitute parts?

A: The TE Connectivity 5225555-2 and 5225555-5 do not provide insertion loss specifications in the available data. The Amphenol RF 031-2351 specifies 0.18 dB insertion loss. For applications where insertion loss is a critical parameter, the original part is recommended.

Q: Can the substitutes handle the same frequency range as the original?

A: Yes, all three parts are rated for maximum frequency of 11 GHz, supporting identical RF performance across the specified frequency range.