Amphenol RF 031-80108 BNC Connector Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-80108 is a BNC connector plug with male pin configuration, designed for 75-ohm coaxial cable applications. This straight, free-hanging crimp connector operates at frequencies up to 4 GHz and is rated for 500 volts with a maximum operating temperature range of -65°C to 165°C. The part is currently in active product status with 758 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part's specifications, particularly impedance, connector style, termination method, and fastening type.

Substiute Parts

031-80108

Amphenol RFIn Stock: 817031-80108 Datasheet

Current PartRFQ

221185-8

TE Connectivity AMP ConnectorsIn Stock: 1093221185-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 031-80108 are identified based on strict alignment of the following critical parameters:

Electrical Compatibility Parameters:

• Impedance: 75 Ohms (required match)
• Connector Style: BNC (required match)
• Connector Type: Plug, Male Pin (required match)
• Fastening Type: Bayonet Lock (required match)
• Voltage Rating: 500 V (required match)

Mechanical Compatibility Parameters:

• Contact Termination: Crimp (required match)
• Shield Termination: Crimp (required match)
• Mounting Type: Free Hanging (In-Line) (required match)
• Number of Ports: 1 (required match)

Performance Parameters:

• Mating Cycles: 500 (required match)

The TE Connectivity AMP Connectors part number 221185-8 meets all critical electrical and mechanical compatibility requirements. However, this part exhibits differences in frequency maximum rating (2 GHz versus 4 GHz), operating temperature range (-55°C ~ 85°C versus -65°C ~ 165°C), dielectric material composition, body material, and product status (Obsolete versus Active). These differences establish the substitution relationship and define the operational boundaries for equivalent application.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: Amphenol RF 031-80108

The Amphenol RF 031-80108 is the recommended primary component for new designs and applications. This part maintains active product status, ensuring long-term availability and supply chain stability. The connector is ROHS3 compliant and REACH affected, meeting current regulatory requirements for electronic component manufacturing and distribution. The extended operating temperature range (-65°C to 165°C) and maximum frequency rating of 4 GHz provide broader application flexibility across industrial, aerospace, and telecommunications environments.

Substitute Selection: TE Connectivity AMP Connectors 221185-8

The TE Connectivity 221185-8 serves as an electrical and mechanical equivalent for applications where the operational constraints align with its specifications. This part is classified as obsolete, indicating discontinued manufacturing and potential supply limitations. The RoHS non-compliant status restricts its use in applications subject to current regulatory frameworks. The reduced operating temperature range (-55°C to 85°C) and maximum frequency rating of 2 GHz limit its application scope to lower-frequency, moderate-temperature environments. Selection of this substitute requires confirmation that application requirements do not exceed the specified performance boundaries and that regulatory compliance is not a constraint.

Compliance Considerations

Applications requiring ROHS3 compliance must use the Amphenol RF 031-80108. Applications requiring REACH compliance status confirmation should prioritize the Amphenol RF part, as the TE Connectivity substitute has undefined REACH status. Both parts share identical ECCN (EAR99) and HTSUS (8536.69.4010) classifications.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 221185-8 be used as a direct replacement for the Amphenol RF 031-80108?

A: The TE Connectivity 221185-8 is mechanically and electrically compatible for bayonet-lock BNC plug connections with 75-ohm impedance and crimp termination. However, the substitute part operates at reduced maximum frequency (2 GHz versus 4 GHz) and narrower temperature range (-55°C to 85°C versus -65°C to 165°C). Direct replacement is valid only when application requirements remain within these operational boundaries.

Q: What are the key differences between these two connectors?

A: The primary differences are: (1) Product Status—Amphenol RF is active; TE Connectivity is obsolete; (2) Frequency Rating—Amphenol RF supports 4 GHz; TE Connectivity supports 2 GHz; (3) Operating Temperature—Amphenol RF operates -65°C to 165°C; TE Connectivity operates -55°C to 85°C; (4) Regulatory Compliance—Amphenol RF is ROHS3 compliant; TE Connectivity is RoHS non-compliant; (5) Dielectric Material—Amphenol RF uses PTFE; TE Connectivity uses polyethylene; (6) Body Material—Amphenol RF uses phosphor bronze; TE Connectivity uses zinc.

Q: Are there cable compatibility differences between these connectors?

A: The Amphenol RF 031-80108 is specified for Belden 8281 cable. The TE Connectivity 221185-8 is specified for RG-179, 179A, 179B, 187, and 187A cables. Cable compatibility must be verified for the specific application and termination requirements.

Q: What is the significance of the obsolete status for the TE Connectivity part?

A: Obsolete status indicates that the TE Connectivity 221185-8 is no longer manufactured. This classification creates supply chain risk, as inventory is limited to existing stock. New designs should not incorporate obsolete components. Existing systems using this part may face replacement challenges if additional units are required.

Q: Can both connectors be used interchangeably in existing installations?

A: Mechanical and electrical interchangeability exists for the bayonet-lock connection interface. However, substitution requires confirmation that the application does not exceed the TE Connectivity part's frequency or temperature limitations. Regulatory compliance requirements must also be evaluated, as the TE Connectivity part does not meet current ROHS3 standards.

Q: What is the insertion loss difference between these connectors?

A: The Amphenol RF 031-80108 has insertion loss of 0.2 dB, while the TE Connectivity 221185-8 has insertion loss of 0.15 dB. This 0.05 dB difference is negligible for most applications and does not constitute a performance differentiator for substitution decisions.

Q: Are there any packaging or quantity differences?

A: The Amphenol RF 031-80108 includes 3 pieces per connector package (1 connector, 1 contact, 1 ferrule). The TE Connectivity 221185-8 packaging details are not specified in the provided data. Packaging configuration should be verified during procurement.