SBC8279A BNC Connector Plug 75 Ohm Crimp

Part Overview

The SBC8279A is a BNC connector plug manufactured by Winchester Interconnect, designed for 75-ohm coaxial cable applications. This male pin connector features crimp termination for both center contact and shield, with a bayonet lock fastening mechanism. The connector is rated for frequencies up to 1 GHz and operates at 500 V with an insertion loss of 0.2 dB. The product is currently active and RoHS compliant. Substitute parts may be required due to inventory constraints, design phase transitions, or specific application requirements where alternative manufacturers' components meet identical electrical and mechanical specifications.

Substiute Parts

SBC8279A

Winchester InterconnectIn Stock: 1004SBC8279A Datasheet

Current PartRFQ

031-71008-1RFX

Amphenol RFIn Stock: 1327031-71008-1RFX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SBC8279A is permissible with the Amphenol RF part number 031-71008-1RFX based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Connector Style: BNC
• Connector Type: Plug, Male Pin
• Impedance: 75 Ohms
• Contact Termination: Crimp
• Shield Termination: Crimp
• Mounting Type: Free Hanging (In-Line)
• Fastening Type: Bayonet Lock
• Voltage Rating: 500 V
• Insertion Loss: 0.2 dB
• Mating Cycles: 500
• Body Material: Brass
• Body Finish: Nickel
• Housing Color: Silver
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part 031-71008-1RFX exceeds the frequency specification of the main part (2 GHz versus 1 GHz maximum), which does not restrict its use in applications requiring the SBC8279A. Both parts are compatible with the Belden 8279A cable group and maintain identical electrical performance characteristics at the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

SBC8279A (Winchester Interconnect): This part is recommended for new designs and active production applications. The component maintains active product status with full manufacturer support and RoHS compliance. Current inventory of 941 pieces supports immediate deployment.

031-71008-1RFX (Amphenol RF): This substitute part is suitable for existing designs or legacy system maintenance where component replacement is necessary. The part carries a "Not For New Designs" status, indicating it should not be selected for new development projects. However, it meets all electrical and mechanical requirements for direct substitution in applications currently using the SBC8279A. The part is ROHS3 compliant and REACH affected, with 1283 pieces available in inventory. The higher frequency rating (2 GHz) provides additional operational margin beyond the specified 1 GHz requirement.

Selection between these parts should be based on design phase (new versus existing) and manufacturer support requirements rather than electrical performance, as both components deliver identical functional characteristics within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the 031-71008-1RFX directly replace the SBC8279A in existing applications?

A: Yes. Both connectors share identical electrical specifications (75-ohm impedance, 500 V rating, 0.2 dB insertion loss, 500 mating cycles) and mechanical characteristics (BNC plug, male pin, crimp termination, bayonet lock, free-hanging mount). The substitute part's higher frequency rating (2 GHz) does not restrict compatibility with 1 GHz applications.

Q: Why is the 031-71008-1RFX marked "Not For New Designs"?

A: This designation reflects the manufacturer's product lifecycle status and does not indicate technical inadequacy. The part remains fully functional and compliant. New designs should prioritize the SBC8279A (active status) for long-term manufacturer support and supply continuity.

Q: Are there packaging differences between these parts?

A: The SBC8279A is supplied with unspecified packaging, while the 031-71008-1RFX is supplied in bulk packaging. The 031-71008-1RFX includes 3 pieces per connector package (1 connector, 1 contact, 1 ferrule). Verify packaging requirements for your assembly process before selection.

Q: What is the significance of the ROHS3 compliance on the substitute part?

A: ROHS3 compliance indicates adherence to the most current Restriction of Hazardous Substances directive. Both parts are RoHS compliant; the substitute part meets the newer ROHS3 standard. This does not affect electrical or mechanical compatibility.

Q: Are both parts compatible with Belden 8279A cable?

A: Yes. Both the SBC8279A and 031-71008-1RFX are designed for use with Belden 8279A cable. The substitute part additionally supports RG-59, 59B, 62, 140, 210, Belden 8241, 8263, and 9209 cables, providing broader cable compatibility.

Q: What is the difference in center contact material between these parts?

A: The SBC8279A center contact material is not specified in the provided data. The 031-71008-1RFX uses brass with gold plating. This difference does not affect electrical performance at the specified operating parameters.