Amphenol RF 031-245 BNC Connector Jack Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-245 is a BNC connector jack designed for coaxial RF applications requiring 50-ohm impedance. This female socket connector features panel mount installation with bulkhead front-side nut fastening and crimp termination for both center contact and shield. The part is currently active in production with 1143 pieces in stock inventory. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in system designs, particularly when primary part availability is limited or when specific termination or material requirements necessitate alternative sourcing.

Substiute Parts

031-245

Amphenol RFIn Stock: 1171031-245 Datasheet

Current PartRFQ

031-245-RFX

Amphenol RFIn Stock: 933031-245-RFX Datasheet

Parametric EquivalentRFQ

2-329458-1

TE Connectivity AMP ConnectorsIn Stock: 12032-329458-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 031-245 are classified based on strict adherence to the following critical parameters that define functional equivalence:

Primary Equivalence Criteria:

• Connector style (BNC)
• Connector type (Jack, Female Socket)
• Impedance (50 Ohms)
• Mounting type (Panel Mount)
• Mounting feature (Bulkhead - Front Side Nut)
• Fastening type (Bayonet Lock)
• Voltage rating (500 V)
• Mating cycles (500)

Secondary Compatibility Parameters:

• Contact termination method (Crimp or Push On acceptable with cable group compatibility)
• Shield termination (Crimp)
• Cable group compatibility (RG-179, 179A, 179B, 187, 187A, Belden 9221, M17/94-RG179)
• Frequency maximum rating (minimum 2.5 GHz required)
• Operating temperature range (must encompass application requirements)
• RoHS compliance status (ROHS3 Compliant preferred for regulatory alignment)

Substitutes are identified when these parameters align with the main part specification, allowing direct replacement in panel-mount BNC jack applications without modification to mechanical interfaces or electrical performance requirements.

Parameter Comparison

Engineering Selection Recommendations

031-245-RFX (Parametric Equivalent - Amphenol RF):

The 031-245-RFX maintains full electrical and mechanical compatibility with the 031-245 across all critical parameters. Both parts share identical connector style, impedance, mounting configuration, and frequency rating. The 031-245-RFX is ROHS3 compliant and carries equivalent regulatory certifications. The primary difference is the dielectric material composition (POM Acetal versus PTFE), which does not affect the 50-ohm impedance or mechanical interface. This part is suitable for direct substitution when the main part is unavailable. Inventory of 858 pieces supports supply chain continuity.

2-329458-1 (Direct Manufacturer - TE Connectivity AMP Connectors):

The 2-329458-1 provides cross-manufacturer substitution with equivalent mechanical mounting and electrical performance for applications operating within its specified frequency and temperature ranges. This part differs in three key aspects: (1) contact termination is Push On rather than Crimp, requiring compatible cable preparation; (2) maximum frequency is 2.5 GHz, limiting use to applications not exceeding this specification; (3) operating temperature range is -55°C ~ 85°C, which is narrower than the main part. The part is RoHS non-compliant, which may restrict use in regulated applications. Selection of this substitute requires confirmation that application frequency and temperature requirements fall within its operational envelope and that Push On termination is acceptable for the cable assembly process.

Frequently Asked Questions (FAQ)

Q: Can the 031-245-RFX be used as a direct replacement for the 031-245?

A: Yes. The 031-245-RFX is a parametric equivalent with identical connector style, impedance, mounting type, and frequency rating. Both parts are ROHS3 compliant and support the same cable groups. The dielectric material difference (POM Acetal versus PTFE) does not affect mechanical or electrical compatibility for standard RF applications.

Q: What is the primary limitation of the 2-329458-1 substitute?

A: The 2-329458-1 has a maximum frequency rating of 2.5 GHz compared to 4 GHz for the 031-245. Applications requiring operation above 2.5 GHz must use the main part or the 031-245-RFX. Additionally, the operating temperature range is -55°C ~ 85°C, which is narrower than the main part's -65°C ~ 165°C specification.

Q: Does the 2-329458-1 use the same termination method as the 031-245?

A: No. The 031-245 uses crimp termination for the center contact, while the 2-329458-1 uses Push On termination. Both shield terminations are crimp. Push On termination requires different cable preparation procedures and tooling compared to crimp termination. Verify that your cable assembly process supports Push On termination before selecting this substitute.

Q: Are all three parts RoHS compliant?

A: The 031-245 and 031-245-RFX are both ROHS3 compliant. The 2-329458-1 is RoHS non-compliant. Applications subject to RoHS regulations must use either the main part or the 031-245-RFX.

Q: What cable types are compatible with each substitute?

A: The 031-245 and 031-245-RFX support RG-179, 179A, 179B, 187, 187A, Belden 9221, and M17/94-RG179 cable groups. The 2-329458-1 supports RG-161, 179, 179A, 179B, 187, 187A, and Belden 9221. All three parts are compatible with RG-179, 179A, 179B, 187, 187A, and Belden 9221. The 031-245 and 031-245-RFX additionally support M17/94-RG179, while the 2-329458-1 additionally supports RG-161.

Q: What is the difference in dielectric material between the 031-245 and 031-245-RFX?

A: The 031-245 uses polytetrafluoroethylene (PTFE) as the dielectric material, while the 031-245-RFX uses polyoxymethylene (POM) acetal. Both materials maintain the 50-ohm impedance specification and are suitable for RF applications. PTFE offers superior high-temperature performance, while POM acetal provides cost optimization. For applications within the specified operating temperature ranges, both materials are functionally equivalent.

Q: Can I use the 2-329458-1 in applications requiring the full -65°C ~ 165°C temperature range?

A: No. The 2-329458-1 is rated for -55°C ~ 85°C operation. Applications requiring the full -65°C ~ 165°C temperature range must use the 031-245 or 031-245-RFX.

Q: What is the inventory status for each part?

A: The 031-245 has 1143 pieces in stock, the 031-245-RFX has 858 pieces in stock, and the 2-329458-1 has 1113 pieces in stock. All parts are listed as new original inventory.