Amphenol RF 31-71008 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 31-71008 is a BNC connector plug designed for 75-ohm coaxial cable applications. This male pin connector features crimp or solder termination and is rated for frequencies up to 2 GHz with a bayonet lock fastening mechanism. The part is designated as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for applications requiring continued support, legacy system maintenance, or when the primary part becomes unavailable.

Substiute Parts

31-71008

Amphenol RFIn Stock: 111531-71008 Datasheet

Current PartRFQ

112952

Amphenol RFIn Stock: 819112952 Datasheet

DirectRFQ

31-71008-1000

Amphenol RFIn Stock: 82631-71008-1000 Datasheet

Parametric EquivalentRFQ

5413589-2

TE Connectivity AMP ConnectorsIn Stock: 9675413589-2 Datasheet

DirectRFQ

SBC8241

Winchester InterconnectIn Stock: 1219SBC8241 Datasheet

DirectRFQ

SBC8241A

Winchester InterconnectIn Stock: 969SBC8241A Datasheet

DirectRFQ

413589-6

TE Connectivity AMP ConnectorsIn Stock: 843413589-6 Datasheet

SimilarRFQ

5286

Pomona ElectronicsIn Stock: 9175286 Datasheet

SimilarRFQ

5413589-6

TE Connectivity AMP ConnectorsIn Stock: 8895413589-6 Datasheet

SimilarRFQ

UPL220-009

Cinch Connectivity Solutions TrompeterIn Stock: 1247UPL220-009 Datasheet

SimilarRFQ

UPL220-013

Cinch Connectivity Solutions TrompeterIn Stock: 1662UPL220-013 Datasheet

SimilarRFQ

UPL220-020

Cinch Connectivity Solutions TrompeterIn Stock: 1137UPL220-020 Datasheet

SimilarRFQ

UPL220-025

Cinch Connectivity Solutions TrompeterIn Stock: 1015UPL220-025 Datasheet

SimilarRFQ

UPL220-026

Cinch Connectivity Solutions TrompeterIn Stock: 1249UPL220-026 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 31-71008 are classified based on strict parameter alignment across the following critical criteria:

Primary Substitution Criteria:

• Connector style (BNC)
• Connector type (Plug, Male Pin)
• Impedance (75 Ohms)
• Mounting type (Free Hanging/In-Line)
• Fastening type (Bayonet Lock)
• Contact termination method (Crimp, Solder, or Crimp or Solder)
• Voltage rating (500 V)
• Mating cycles (500)

Secondary Compatibility Factors:

• Frequency rating (minimum 2 GHz)
• Operating temperature range
• Body material and finish
• Center contact plating
• Dielectric material
• Cable group compatibility
• RoHS compliance status

Parts are grouped into three categories:

1. Direct Manufacturer Equivalents – Amphenol RF parts with identical or superior electrical specifications and active product status
2. Parametric Equivalents – Amphenol RF parts with matching core parameters but different packaging or minor specification variations
3. Cross-Manufacturer Substitutes – Parts from alternative manufacturers meeting all critical electrical and mechanical parameters

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes:

Amphenol RF 112952 – This part is the preferred direct substitute. It is manufactured by the same supplier as the original 31-71008, maintains 75-ohm impedance and bayonet lock fastening, and carries Active product status. The 112952 offers superior frequency performance at 4 GHz compared to the 2 GHz rating of the original part. Both parts are ROHS3 compliant. The primary difference is termination method: 112952 is crimp-only, whereas 31-71008 supports both crimp and solder. Selection of 112952 is appropriate for applications where crimp termination is acceptable.

Cinch Connectivity Solutions Trompeter UPL220-013 – This part provides full parametric compatibility with the 31-71008. Both maintain 75-ohm impedance, bayonet lock fastening, PTFE dielectric, and identical operating temperature range (-65°C to 165°C). The UPL220-013 is rated for 4 GHz, exceeding the original 2 GHz specification. This part is Active and ROHS3 compliant. Cable group compatibility is RG-59, which aligns with the primary cable group of the original part.

Cinch Connectivity Solutions Trompeter UPL220-009 – This part meets all critical electrical parameters and is rated for 4 GHz. Operating temperature range matches the original (-65°C to 165°C), and ROHS3 compliance is maintained. Cable group compatibility includes Belden 8218, which is within the supported cable family. This part is Active.

Secondary Substitutes (Limited Compatibility):

TE Connectivity AMP Connectors 5413589-6 – This part maintains 75-ohm impedance, bayonet lock fastening, and 2 GHz frequency rating. It is Active and RoHS compliant. However, the operating temperature range is narrower (-55°C to 85°C) compared to the original (-65°C to 165°C), and the dielectric material is polyethylene rather than PTFE. Use this part only when the reduced temperature range is acceptable for the application.

TE Connectivity AMP Connectors 413589-6 – Similar to 5413589-6 with Active status and 2 GHz frequency rating. This part is RoHS non-compliant, which may restrict use in regulated applications. The narrower operating temperature range (-55°C to 85°C) and polyethylene dielectric present additional limitations.

Not Recommended:

Winchester Interconnect SBC8241 and SBC8241A – These parts are rated for only 1 GHz maximum frequency, which is below the 2 GHz specification of the original 31-71008. While both are Active and RoHS compliant, the reduced frequency capability makes them unsuitable for applications requiring the full 2 GHz performance envelope.

TE Connectivity AMP Connectors 5413589-2 – This part is Obsolete and should not be selected for new applications or ongoing support. The narrower operating temperature range and polyethylene dielectric further limit its suitability.

Amphenol RF 31-71008-1000 – This parametric equivalent is designated "Not For New Designs," the same status as the original 31-71008. While it provides identical electrical specifications, it offers no advantage over the original part and does not represent a forward-looking solution.

Frequently Asked Questions (FAQ)

Q: Can I use Amphenol RF 112952 as a direct replacement for 31-71008?

A: The 112952 is electrically compatible as a direct substitute. Both are 75-ohm BNC male plug connectors with bayonet lock fastening, 500 V rating, and ROHS3 compliance. The 112952 is Active (versus "Not For New Designs" for 31-71008) and offers superior 4 GHz frequency performance. The primary difference is that 112952 supports crimp termination only, whereas 31-71008 supports both crimp and solder. If your application uses crimp termination, the 112952 is the recommended choice.

Q: What is the difference between crimp and solder termination options?

A: The 31-71008 supports both crimp and solder termination methods for the center contact. Crimp termination uses mechanical compression to attach the contact to the cable conductor, while solder termination uses heat and solder to create the connection. The 112952 supports crimp only. If your assembly process requires solder termination, select Pomona Electronics 5286 or confirm that crimp termination is acceptable for your application.

Q: Are the Cinch Connectivity Solutions Trompeter UPL220 series parts fully compatible?

A: Yes, both UPL220-009 and UPL220-013 are fully compatible with the 31-71008 across all critical parameters: 75-ohm impedance, bayonet lock fastening, 500 V rating, PTFE dielectric, and identical operating temperature range (-65°C to 165°C). Both are Active and ROHS3 compliant. The primary difference between them is cable group compatibility: UPL220-013 is specified for RG-59, while UPL220-009 is specified for Belden 8218, YR23023, and Essex 21-597. Select based on your cable type.

Q: Why are the TE Connectivity parts listed as secondary substitutes?

A: TE Connectivity parts 5413589-6 and 413589-6 maintain the core 75-ohm impedance and 2 GHz frequency rating. However, they have a narrower operating temperature range (-55°C to 85°C) compared to the original 31-71008 (-65°C to 165°C). Additionally, they use polyethylene dielectric instead of PTFE. These differences may be acceptable for applications with less demanding temperature requirements, but they represent a reduction in performance envelope. The 413589-6 is also RoHS non-compliant, which may disqualify it from regulated applications.

Q: What does "Not For New Designs" mean for the 31-71008?

A: This designation indicates that Amphenol RF has superseded this part in their product line and does not recommend it for new designs. The part remains available for legacy system support and maintenance. For new applications, Amphenol RF recommends the 112952 or other active alternatives. If you are designing a new system, select an Active-status part such as 112952 or the Cinch UPL220 series.

Q: Can I use Winchester Interconnect SBC8241 or SBC8241A as substitutes?

A: These parts are not recommended as direct substitutes. While they are 75-ohm BNC male plugs with bayonet lock fastening and Active status, they are rated for only 1 GHz maximum frequency. The original 31-71008 is rated for 2 GHz. Using a 1 GHz connector in a 2 GHz application will result in performance degradation and potential signal integrity issues. Use these parts only if your application operates below 1 GHz.

Q: What is the significance of ROHS3 compliance versus RoHS compliance?

A: ROHS3 (Directive 2011/65/EU as amended) is the current European Union restriction on hazardous substances regulation. RoHS (the original 2002/95/EC) is the predecessor standard. ROHS3 compliance is more stringent and current. The 31-71008, 112952, and Cinch UPL220 series are all ROHS3 compliant, making them suitable for applications with strict environmental and regulatory requirements. TE Connectivity parts are RoHS compliant but not ROHS3 compliant, which may restrict their use in certain regulated markets.

Q: How do I determine which cable group is compatible with each connector?

A: The cable group specification indicates which coaxial cable types are designed to work with the connector. The 31-71008 supports RG-59, 59B, 62, 140, 210, and Belden 8241, 8263, 8279, 9209. When selecting a substitute, match the cable group to your specific cable type. For example, if you use Belden 8241 cable, both the original 31-71008 and Winchester SBC8241 are specified for this cable. If you use RG-59, the Cinch UPL220-013 is specified for RG-59. Mismatched cable and connector combinations may result in impedance discontinuities and signal reflections.

Q: What is the difference between the 31-71008 and 31-71008-1000?

A: Both parts are Amphenol RF products with identical electrical specifications: 75-ohm impedance, 2 GHz frequency rating, PTFE dielectric, and -65°C to 165°C operating temperature. The primary difference is packaging: 31-71008 is packaged in Bulk, while 31-71008-1000 is also Bulk. Both are designated "Not For New Designs." The 31-71008-1000 offers no advantage over the original and should not be selected for new applications. For new designs, select an Active-status part such as 112952 or the Cinch UPL220 series.

Q: Can I use Pomona Electronics 5286 as a substitute?

A: The Pomona 5286 is compatible for applications requiring solder termination. It maintains 75-ohm impedance, bayonet lock fastening, 500 V rating, and PTFE dielectric. It is rated for 4 GHz, exceeding the original 2 GHz specification, and is ROHS3 compliant. The primary difference is that 5286 uses solder termination exclusively, whereas 31-71008 supports both crimp and solder. If your assembly process requires solder termination and you cannot use crimp, the 5286 is a suitable choice.

Q: What inventory levels should I consider when selecting a substitute?

A: Inventory levels are provided for reference but should not be the primary selection criterion. The 31-71008 has 1081 pieces in stock, while active alternatives such as UPL220-013 (1558 pieces), SBC8241 (1166 pieces), and UPL220-009 (1162 pieces) have comparable or higher availability. Amphenol RF 112952 has 806 pieces available. Inventory levels may change over time. Prioritize electrical compatibility and product status (Active versus Not For New Designs or Obsolete) over inventory quantity when making selection decisions.