Amphenol RF 031-335 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-335 is a BNC connector plug designed for right-angle crimp termination on 50-ohm coaxial cables. This male pin connector operates at frequencies up to 4 GHz and is rated for 500 volts with 500 mating cycles. The part is currently active in production status with 779 pieces in stock inventory.

Substitute parts are identified when design requirements permit alternative components that maintain electrical and mechanical compatibility within the specified parameter ranges. This reference page documents equivalent and substitute options for the 031-335 based on matching critical performance parameters.

Substiute Parts

031-335

Amphenol RFIn Stock: 836031-335 Datasheet

Current PartRFQ

31-335-RFX

Amphenol RFIn Stock: 92531-335-RFX Datasheet

Parametric EquivalentRFQ

225974-1

TE Connectivity AMP ConnectorsIn Stock: 834225974-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 031-335 is determined by matching the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: BNC
• Connector Type: Plug, Male Pin
• Impedance: 50 Ohms
• Contact Termination: Crimp
• Shield Termination: Crimp
• Mounting Type: Free Hanging (In-Line), Right Angle
• Fastening Type: Bayonet Lock
• Frequency - Max: 4 GHz minimum
• Voltage Rating: 500 V minimum
• Insertion Loss: 0.2 dB maximum
• Number of Ports: 1

Compatible Cable Groups: The 031-335 is specified for use with RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, and 9907 cable types.

Two substitute parts meet these criteria with documented compatibility:

1. 31-335-RFX (Amphenol RF) - Parametric equivalent with identical electrical specifications and active product status
2. 225974-1 (TE Connectivity AMP Connectors) - Direct manufacturer alternative with matching core parameters, though product status is obsolete

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: 031-335 (Amphenol RF)

The 031-335 is the recommended primary choice for new designs and production applications. It maintains active product status, full ROHS3 compliance, and the widest operating temperature range (-65°C to 165°C). Current inventory of 779 pieces supports immediate availability.

Secondary Selection: 31-335-RFX (Amphenol RF)

The 31-335-RFX is a parametric equivalent suitable for direct substitution. It shares identical electrical specifications, active product status, and ROHS3 compliance with the 031-335. The primary difference is the dielectric material composition (POM Acetal versus PTFE). With 839 pieces in inventory, this part provides an alternative source from the same manufacturer.

Tertiary Selection: 225974-1 (TE Connectivity AMP Connectors)

The 225974-1 is a direct manufacturer alternative that meets all core electrical and mechanical parameters. However, this part carries obsolete product status and is RoHS non-compliant. The operating temperature range is restricted to -55°C to 85°C, which is narrower than the primary part. The compatible cable group is limited to RG-58, 58A, 58B, and 58C, excluding the extended cable compatibility of the 031-335. This part should be used only when existing designs or legacy systems specifically require TE Connectivity components and when operating conditions remain within the specified temperature limits.

Frequently Asked Questions (FAQ)

Q: Can the 31-335-RFX be used as a direct replacement for the 031-335?

A: Yes. The 31-335-RFX meets all mandatory electrical and mechanical parameters for substitution. Both parts are manufactured by Amphenol RF, maintain active product status, and are ROHS3 compliant. The dielectric material differs (POM Acetal versus PTFE), but both materials satisfy the specified electrical performance at 4 GHz and 50-ohm impedance.

Q: What are the limitations of using the 225974-1 as a substitute?

A: The 225974-1 has three significant limitations: (1) Obsolete product status means future availability is not guaranteed; (2) RoHS non-compliance may restrict use in regulated applications; (3) Operating temperature range is limited to -55°C to 85°C, which excludes high-temperature applications above 85°C and low-temperature applications below -55°C that the 031-335 supports.

Q: Are all three parts compatible with the same cable types?

A: The 031-335 and 31-335-RFX are compatible with RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, and 9907 cables. The 225974-1 is specified only for RG-58, 58A, 58B, and 58C cables, providing a narrower cable compatibility range.

Q: What is the difference in dielectric material between the 031-335 and 31-335-RFX?

A: The 031-335 uses Polytetrafluoroethylene (PTFE) as the dielectric material, while the 31-335-RFX uses Polyoxymethylene (POM) Acetal. Both materials provide the specified electrical performance and operating temperature range for this connector application.

Q: Which part should be selected for new product designs?

A: The 031-335 is the recommended choice for new designs. It provides the widest operating temperature range, active product status, full ROHS3 compliance, and extended cable compatibility. The 31-335-RFX is suitable as an alternative source from the same manufacturer if supply constraints occur.

Q: Is the 225974-1 suitable for applications requiring RoHS compliance?

A: No. The 225974-1 is RoHS non-compliant and should not be used in applications requiring RoHS certification or regulatory compliance. Both the 031-335 and 31-335-RFX are ROHS3 compliant and are appropriate for regulated applications.

Q: What is the significance of the "Bayonet Lock" fastening type?

A: The Bayonet Lock fastening type indicates the connector uses a quarter-turn bayonet coupling mechanism for mating and unmating. All three substitute parts share this fastening type, ensuring mechanical compatibility in applications designed for BNC bayonet connectors.

Q: Can these connectors be used interchangeably in existing assemblies?

A: Yes, provided the assembly operates within the specified parameter ranges of the substitute part. For applications using the 225974-1, verify that operating temperatures remain within -55°C to 85°C and that cable types are limited to RG-58, 58A, 58B, or 58C. For the 31-335-RFX, all parameter ranges match the 031-335.