Amphenol RF 31-342 BNC Connector Jack Equivalent & Substitute Parts

Part Overview

The Amphenol RF 31-342 is a BNC connector jack with female socket configuration, designed for 50 ohm coaxial applications. This panel mount crimp connector operates across a frequency range up to 4 GHz and is rated for 500 volts with 500 mating cycles. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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, inventory management, or design flexibility when the original part becomes unavailable.

Key Parameters

Parameter	Value
Connector Style	BNC
Connector Type	Jack, Female Socket
Impedance	50 Ohms
Contact Termination	Crimp
Shield Termination	Crimp
Mounting Type	Panel Mount
Mounting Feature	Bulkhead - Front Side Nut
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Voltage Rating	500 V
Mating Cycles	500
Insertion Loss	0.2 dB
Body Material	Brass
Body Finish	Nickel
Center Contact Plating	Gold
Dielectric Material	Polytetrafluoroethylene (PTFE)
Operating Temperature	-65°C ~ 165°C
Number of Ports	1

Substitute Part Grouping Explanation

Substitution of BNC connector jacks is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Connector style (BNC)
Connector type (Jack, Female Socket)
Impedance (50 Ohms)
Contact and shield termination method (Crimp)
Mounting configuration (Panel Mount, Bulkhead - Front Side Nut)
Fastening mechanism (Bayonet Lock)
Frequency rating (4 GHz maximum)
Voltage rating (500 V)
Mating cycles (500)
Insertion loss (0.2 dB)

Secondary Compatibility Factors:

Cable group compatibility (determines which coaxial cable types can be terminated)
Center contact material (Phosphor Bronze vs. Beryllium Copper)
Body material and finish
Dielectric material composition
Operating temperature range
Included components and accessories

Substitute parts are grouped into three categories based on their relationship to the main part 31-342:

Direct Manufacturer Equivalents: Parts from Amphenol RF that maintain identical electrical and mechanical specifications with active product status.

Parametric Equivalents: Parts meeting all critical electrical and mechanical parameters but with variations in secondary characteristics such as dielectric material or included components.

Cross-Manufacturer Alternatives: Parts from TE Connectivity that satisfy core functional requirements but may differ in contact material, body material, or cable group compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Center Contact Material	Body Material	Dielectric Material	Operating Temperature	Cable Group	Included Components	RoHS Status
31-342	Amphenol RF	Not For New Designs	Phosphor Bronze	Brass	PTFE	-65°C ~ 165°C	RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907	6 pcs	RoHS Compliant
112202	Amphenol RF	Active	Phosphor Bronze	Brass	PTFE	Not specified	RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907	5 pcs	ROHS3 Compliant
031-5935-RFX	Amphenol RF	Active	Phosphor Bronze	Brass	PTFE	-65°C ~ 165°C	RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907	6 pcs	ROHS3 Compliant
31-342-RFX	Amphenol RF	Active	Phosphor Bronze	Brass	PTFE	-65°C ~ 165°C	RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907	6 pcs	ROHS3 Compliant
5225398-1	TE Connectivity AMP Connectors	Active	Beryllium Copper	Brass	PTFE	-55°C ~ 85°C	RG-58, 58A, 58B, 58C	6 pcs	RoHS Compliant
1-5225398-5	TE Connectivity AMP Connectors	Active	Beryllium Copper	Brass	PTFE	-55°C ~ 85°C	RD-316 Double Braid	7 pcs	RoHS Compliant
225398-1	TE Connectivity AMP Connectors	Active	Beryllium Copper	Brass	PTFE	-55°C ~ 85°C	RG-58, 58A, 58B, 58C	5 pcs	Not applicable
228980-7	TE Connectivity AMP Connectors	Active	Beryllium Copper	Zinc	Polypropylene (PP)	-55°C ~ 85°C	RG-174, 188, 316	5 pcs	RoHS non-compliant
5225398-3	TE Connectivity AMP Connectors	Obsolete	Beryllium Copper	Brass	PTFE	-55°C ~ 85°C	RG-55, 55A, 55B, 223	6 pcs	RoHS Compliant
5413771-3	TE Connectivity AMP Connectors	Active	Beryllium Copper	Zinc	Polymethylpentene (PMP)	-55°C ~ 85°C	RG-174, 188, 316	7 pcs	ROHS3 Compliant
6-331693-2	TE Connectivity Aerospace, Defense and Marine	Discontinued at DiGi Electronics	Beryllium Copper	Brass	PTFE	-55°C ~ 85°C	RG-174, 188	7 pcs	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Amphenol RF Active Parts):

Part 31-342-RFX is the primary recommended substitute. This part maintains identical electrical specifications, mechanical configuration, and operating temperature range (-65°C ~ 165°C) as the original 31-342. It carries active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The 31-342-RFX includes six components identical to the original specification and supports the complete cable group range.

Part 031-5935-RFX provides equivalent functionality with identical operating temperature range and component count. Both parts are manufactured by Amphenol RF and maintain the original design specifications.

Part 112202 offers an alternative from Amphenol RF with active status and ROHS3 compliance. This part differs in packaging (Bag vs. Bulk) and includes five components rather than six, omitting the gasket. Operating temperature is not specified in available documentation.

Tier 2 - Cross-Manufacturer Alternatives (TE Connectivity):

Parts 5225398-1 and 225398-1 from TE Connectivity AMP Connectors meet core electrical and mechanical requirements with active product status. These parts use Beryllium Copper center contacts instead of Phosphor Bronze and operate within a narrower temperature range (-55°C ~ 85°C). Cable group compatibility is limited to RG-58, 58A, 58B, 58C. Part 5225398-1 includes six components; part 225398-1 includes five components.

Part 1-5225398-5 is functionally equivalent but designed for RD-316 Double Braid cable and includes seven components with an additional bushing.

Tier 3 - Limited Compatibility (Specialized Cable Groups):

Parts 228980-7 and 5413771-3 are designed for smaller diameter cables (RG-174, 188, 316). Part 228980-7 uses Zinc body material and Polypropylene dielectric, with RoHS non-compliance status. Part 5413771-3 uses Zinc body material with Polymethylpentene dielectric and carries ROHS3 compliance.

Tier 4 - Not Recommended:

Part 5225398-3 carries obsolete product status and is not recommended for new applications or ongoing support.

Part 6-331693-2 is discontinued at DiGi Electronics and carries limited availability.

Compliance Considerations:

The original 31-342 carries RoHS Compliant status. Recommended substitutes 31-342-RFX, 031-5935-RFX, and 112202 all carry ROHS3 Compliant status, providing enhanced regulatory alignment. Cross-manufacturer alternatives from TE Connectivity vary in compliance status; 5225398-1 and 225398-1 are RoHS Compliant, while 5413771-3 is ROHS3 Compliant. Part 228980-7 is RoHS non-compliant and should be avoided in applications requiring RoHS certification.

Frequently Asked Questions (FAQ)

Q: Can I use part 112202 as a direct replacement for 31-342?

A: Part 112202 is functionally equivalent and maintains identical electrical specifications, impedance, frequency rating, and cable group compatibility. The primary differences are packaging format (Bag vs. Bulk) and component count (5 vs. 6 pieces). The omitted component is the gasket. If gasket inclusion is not critical to your application, 112202 is a valid substitute. However, 31-342-RFX is preferred as it maintains all original specifications including the six-piece component set.

Q: What is the difference between 31-342-RFX and 031-5935-RFX?

A: Both parts are Amphenol RF products with active status and identical electrical specifications. They maintain the same operating temperature range (-65°C ~ 165°C), support the complete cable group, and include six components. The primary difference is the base product number designation. Both are suitable substitutes for the original 31-342.

Q: Can I substitute a TE Connectivity part for the Amphenol RF 31-342?

A: TE Connectivity parts such as 5225398-1 and 225398-1 meet the core electrical and mechanical requirements (50 ohm impedance, BNC jack configuration, 4 GHz frequency rating, 500V voltage rating, crimp termination, panel mount bulkhead configuration). However, they differ in center contact material (Beryllium Copper vs. Phosphor Bronze), operating temperature range (-55°C ~ 85°C vs. -65°C ~ 165°C), and cable group compatibility. Substitution is acceptable only if your application operates within the narrower temperature range and uses compatible cable types (RG-58, 58A, 58B, 58C for parts 5225398-1 and 225398-1).

Q: Why do some substitute parts have different cable group compatibility?

A: Cable group compatibility is determined by the connector's internal geometry and contact sizing. Parts designed for smaller diameter cables (RG-174, 188, 316) such as 228980-7 and 5413771-3 have different ferrule and contact dimensions than parts designed for standard diameter cables (RG-58 series). Using a connector with incompatible cable group will result in poor contact engagement, signal loss, and potential connector failure. Always verify cable group compatibility before substitution.

Q: What does "Not For New Designs" mean for part 31-342?

A: This designation indicates that Amphenol RF has superseded this part in their product line and does not recommend it for new design implementations. However, the part remains available for existing applications and legacy system support. For new designs, Amphenol RF recommends using active products such as 31-342-RFX, 031-5935-RFX, or 112202.

Q: Is part 228980-7 suitable for my application?

A: Part 228980-7 meets electrical specifications but differs significantly in material composition and compliance status. It uses Zinc body material instead of Brass, Polypropylene dielectric instead of PTFE, and carries RoHS non-compliant status. Additionally, it is designed for RG-174, 188, and 316 cables, not the RG-58 series supported by the original 31-342. This part is suitable only for applications using the specified smaller diameter cables and where RoHS compliance is not required.

Q: What is the significance of the operating temperature range difference?

A: The original 31-342 operates from -65°C to 165°C, while most TE Connectivity alternatives operate from -55°C to 85°C. If your application requires operation below -55°C or above 85°C, TE Connectivity parts are not suitable. Amphenol RF substitutes (31-342-RFX, 031-5935-RFX) maintain the original -65°C to 165°C range and are required for extended temperature applications.

Q: Why is part 5225398-3 marked as obsolete?

A: Part 5225398-3 carries obsolete product status, indicating it has been discontinued and is no longer supported by the manufacturer. While inventory may still be available, long-term supply cannot be guaranteed. This part should not be selected for new applications or ongoing system support. Active alternatives such as 5225398-1 or 5413771-3 should be used instead.

Q: What does ROHS3 compliance mean compared to RoHS Compliant?

A: ROHS3 refers to compliance with the Restriction of Hazardous Substances Directive 2011/65/EU (recast), which includes additional restricted substances beyond the original RoHS directive. ROHS3 Compliant parts meet more stringent environmental and safety standards. Parts marked as ROHS3 Compliant (such as 31-342-RFX, 031-5935-RFX, 112202, and 5413771-3) provide enhanced regulatory alignment for applications requiring current environmental compliance standards.

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