SBC9258 TNC Connector Plug 50 Ohm Crimp - Equivalent & Substitute Parts

Part Overview

The SBC9258 is an active TNC connector plug manufactured by Winchester Interconnect, designed for 50-ohm coaxial cable termination. This male pin connector features crimp termination for both center contact and shield, operating across a frequency range up to 18 GHz with a maximum operating temperature of 200°C. The connector is RoHS compliant and rated for 500 mating cycles, making it suitable for RF applications requiring reliable threaded connections. Substitute parts may be required due to inventory constraints, specific cable compatibility needs, or application-specific termination method preferences.

Substiute Parts

SBC9258

Winchester InterconnectIn Stock: 825SBC9258 Datasheet

Current PartRFQ

031-6003-RFX

Amphenol RFIn Stock: 965031-6003-RFX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SBC9258 is evaluated based on the following critical parameters that must align with the original specification:

Mandatory Compatibility Parameters:

• Connector Style: TNC (threaded coupling mechanism)
• Connector Type: Plug, Male Pin (mating interface configuration)
• Impedance: 50 Ohms (electrical characteristic for RF transmission)
• Fastening Type: Threaded (mechanical coupling method)
• Number of Ports: 1 (single-port configuration)
• Voltage Rating: 500 V (electrical safety rating)
• Mating Cycles: 500 (mechanical durability specification)

Allowable Variation Parameters:

• Contact Termination: Crimp or Solder (both are permanent termination methods)
• Shield Termination: Crimp (primary method; solder acceptable with electrical equivalence)
• Frequency - Max: Equal to or greater than 18 GHz
• Operating Temperature Range: Must encompass or exceed -55°C to 200°C
• Mounting Type: Variations permitted (straight, right angle, free hanging) based on application geometry
• Cable Group Compatibility: Belden 9258 or equivalent cable specifications

The substitute part 031-6003-RFX from Amphenol RF qualifies as an equivalent based on matching core TNC specifications, though with noted variations in termination method, frequency rating, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

SBC9258 Selection Criteria: The SBC9258 is the primary choice for applications requiring crimp termination methodology, maximum frequency operation to 18 GHz, and operating temperatures up to 200°C. This connector is RoHS compliant and maintains active product status with 715 units in stock. The crimp termination provides consistent electrical performance across the specified mating cycle range without requiring soldering equipment or thermal management considerations.

031-6003-RFX Selection Criteria: The 031-6003-RFX serves as an alternative when solder termination is preferred or when right-angle mounting geometry is required for space-constrained applications. This Amphenol RF connector is ROHS3 compliant and REACH affected, with 949 units in stock. The solder termination method requires appropriate thermal processing but may offer advantages in specific assembly workflows. The 11 GHz maximum frequency rating is suitable for applications not requiring the full 18 GHz bandwidth of the SBC9258. The operating temperature maximum of 165°C is lower than the SBC9258, limiting use in high-temperature environments.

Compliance and Certification: Both connectors maintain RoHS compliance and are rated for identical voltage (500 V) and mating cycle specifications (500 cycles). The SBC9258 carries RoHS standard compliance, while the 031-6003-RFX carries ROHS3 compliance, representing a more recent regulatory standard. Both are classified under ECCN EAR99 and HTSUS 8536.69.4010.

Frequently Asked Questions (FAQ)

Q: Can the 031-6003-RFX replace the SBC9258 in all applications?

A: The 031-6003-RFX is electrically compatible for 50-ohm TNC applications up to 11 GHz. However, applications requiring frequencies above 11 GHz must use the SBC9258. Additionally, the 031-6003-RFX's maximum operating temperature of 165°C limits its use in applications exceeding this threshold, whereas the SBC9258 operates to 200°C. The right-angle mounting geometry of the 031-6003-RFX differs from the straight inline configuration of the SBC9258, requiring mechanical layout verification.

Q: What is the difference between crimp and solder termination for these connectors?

A: The SBC9258 uses crimp termination for both center contact and shield, while the 031-6003-RFX uses solder for the center contact and crimp for the shield. Crimp termination provides consistent results without thermal processing and is suitable for high-volume assembly. Solder termination requires controlled thermal application but may be preferred in certain manufacturing environments. Both methods achieve equivalent electrical performance when properly executed.

Q: Are both connectors compatible with Belden 9258 cable?

A: Yes, both the SBC9258 and 031-6003-RFX are compatible with Belden 9258 cable. The 031-6003-RFX additionally supports LMR-240 cable. Cable compatibility is determined by the connector's mechanical design and termination method, both of which align with standard coaxial cable specifications for these product lines.

Q: What is the significance of the frequency rating difference between these connectors?

A: The SBC9258 operates to 18 GHz, while the 031-6003-RFX operates to 11 GHz. This difference reflects the design and materials used in each connector. Applications operating above 11 GHz require the SBC9258. For applications operating below 11 GHz, the 031-6003-RFX provides equivalent performance. Frequency rating is determined by connector geometry, dielectric material, and contact design.

Q: How do the operating temperature ranges affect component selection?

A: The SBC9258 operates from -55°C to 200°C, while the 031-6003-RFX operates from -65°C to 165°C. The SBC9258 supports higher maximum temperatures, making it necessary for applications in thermal environments exceeding 165°C. The 031-6003-RFX provides lower minimum temperature capability (-65°C versus -55°C), suitable for cryogenic or extreme cold applications. Application temperature requirements must be verified against the selected connector's operating range.

Q: What packaging and inventory considerations apply to these parts?

A: The SBC9258 is available with 715 units in stock with unspecified packaging. The 031-6003-RFX is available with 949 units in stock in bulk packaging and includes three components per unit: one connector, one end cap, and one ferrule. The included accessories in the 031-6003-RFX may affect assembly procedures and total cost of ownership.

Q: Are both connectors RoHS compliant?

A: Yes, both connectors are RoHS compliant. The SBC9258 carries standard RoHS compliance, while the 031-6003-RFX carries ROHS3 compliance, representing a more recent regulatory iteration. Both meet current environmental and hazardous substance restrictions. The 031-6003-RFX is additionally REACH affected, indicating compliance with European chemical regulation requirements.