Amphenol RF 031-6154 TNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-6154 is a TNC connector plug with male pin configuration, designed for 50-ohm coaxial cable applications. This connector features a clamp-style shield termination and free-hanging (in-line) mounting suitable for RF and microwave signal transmission up to 11 GHz. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts ensures design continuity and maintains supply chain flexibility for existing applications and legacy system support.

Substiute Parts

031-6154

Amphenol RFIn Stock: 855031-6154 Datasheet

Current PartRFQ

122381

Amphenol RFIn Stock: 1101122381 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Amphenol RF 031-6154 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: TNC
• Connector Type: Plug, Male Pin
• Impedance: 50 Ohms
• Shield Termination: Clamp
• Mounting Type: Free Hanging (In-Line)
• Fastening Type: Threaded
• Frequency Maximum: 11 GHz
• Voltage Rating: 500 V
• Insertion Loss: 0.18 dB
• Mating Cycles: 500

Allowable Variation:

• Contact Termination: The primary part uses clamp termination; substitute parts may employ solder termination, provided all other electrical and mechanical parameters remain equivalent
• Cable Group Compatibility: Substitute parts may support extended cable group ranges while maintaining compatibility with the original cable specifications

The substitute part Amphenol RF 122381 meets all mandatory matching parameters and represents a direct functional equivalent with an alternative contact termination method.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Amphenol RF 122381

The Amphenol RF 122381 is the direct functional equivalent to the 031-6154. Both parts are manufactured by Amphenol RF and share identical electrical and mechanical specifications across all critical parameters including impedance, frequency response, voltage rating, insertion loss, and mating cycle rating.

Key Differentiation:

The 122381 features solder-type contact termination compared to the clamp termination of the 031-6154. This represents an allowable variation within the substitution criteria, as both termination methods achieve equivalent electrical performance while accommodating different assembly methodologies.

Compliance and Status:

The 031-6154 carries a "Not For New Designs" status, indicating manufacturer discontinuation. The 122381 maintains "Active" product status, ensuring ongoing availability and manufacturer support. Both parts maintain identical compliance certifications: ROHS3 Compliant, REACH Affected, and EAR99 export classification.

Cable Compatibility:

The 122381 supports an extended cable group range (RG-8, 8A, 9, 9A, 9B, 87, 213, 214, 225, 302, 393) compared to the 031-6154 (RG-8, 213, 214, Belden 9258, LMR-240). This expanded compatibility provides additional flexibility for cable selection while maintaining full backward compatibility with the original cable specifications.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol RF 122381 directly replace the 031-6154 in existing applications?

A: Yes. The 122381 meets all mandatory electrical and mechanical parameters required for direct substitution. The primary difference is the contact termination method (solder versus clamp), which does not affect electrical performance or mechanical compatibility.

Q: What is the significance of the "Not For New Designs" status on the 031-6154?

A: This designation indicates the manufacturer has discontinued active development and support for this part number. The 122381, with "Active" status, represents the current production equivalent and is recommended for ongoing supply chain continuity.

Q: Are there differences in cable compatibility between these parts?

A: The 122381 supports a broader cable group range than the 031-6154. However, all cable groups specified for the 031-6154 are included within the 122381 compatibility range, ensuring full backward compatibility.

Q: What is the difference between clamp and solder contact termination?

A: Clamp termination (031-6154) uses mechanical compression to secure the cable conductor. Solder termination (122381) uses solder to bond the cable conductor to the contact. Both methods achieve equivalent electrical performance and impedance matching at 50 ohms.

Q: Do both parts meet the same compliance and regulatory requirements?

A: Yes. Both the 031-6154 and 122381 are ROHS3 Compliant, REACH Affected, and classified as EAR99 for export purposes. They share identical HTSUS coding (8536.69.4010).

Q: What is the maximum operating frequency for both connectors?

A: Both parts are rated for operation up to 11 GHz with identical insertion loss of 0.18 dB, ensuring equivalent RF performance across the specified frequency range.

Q: Are the packaging formats different between these parts?

A: Yes. The 031-6154 is supplied in Bulk packaging, while the 122381 is supplied in Bag packaging. Both include identical component sets: 1 Connector, 1 Braid Clamp, 1 Clamp, 1 Contact, 1 Gasket, and 1 Washer per unit.