Molex 0731740113 BNC Connector Plug - Equivalent & Substitute Parts

Part Overview

The Molex 0731740113 is a BNC connector plug designed for 75-ohm coaxial cable applications. This male pin connector features crimp or solder termination and is suitable for free-hanging (in-line) installations. The part is currently active in production with 768 units in stock.

Substitute parts may be required due to supply constraints, design revisions, or specific application requirements that align with compatible electrical and mechanical parameters.

Substiute Parts

0731740113

MolexIn Stock: 8220731740113 Datasheet

Current PartRFQ

31-71008

Amphenol RFIn Stock: 111531-71008 Datasheet

DirectRFQ

142222-75

Amphenol RFIn Stock: 861142222-75 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Compatibility Criteria:

• Connector style and type (BNC plug, male pin configuration)
• Impedance rating (75 ohms)
• Termination method (crimp or solder capability)
• Mounting configuration (free hanging, in-line)
• Fastening mechanism (bayonet lock)

Secondary Compatibility Criteria:

• Cable group compatibility
• Mating cycle rating (minimum 500 cycles)
• RoHS3 compliance status
• Moisture sensitivity level (MSL 1)

Based on these parameters, the following parts are identified as substitutes:

Direct Substitute (Amphenol RF 31-71008): Maintains identical connector style, type, impedance, termination methods, and mounting configuration. Supports expanded cable group compatibility and provides additional electrical specifications (frequency rating, voltage rating, insertion loss data).

Non-Direct Substitute (Amphenol RF 142222-75): This part does not qualify as a direct substitute due to fundamental connector style and type differences (SMB mini connector with female socket configuration versus BNC plug with male pin configuration). This part is listed for reference only and is not electrically or mechanically interchangeable.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (Amphenol RF 31-71008):

This part meets all primary and secondary compatibility criteria and is electrically and mechanically interchangeable with the Molex 0731740113. Both parts are ROHS3 compliant and maintain identical mating cycle ratings. The Amphenol RF part provides additional electrical performance data (frequency rating to 2 GHz, voltage rating of 500 V, insertion loss of 0.2 dB) and supports a broader cable group range. However, the Amphenol RF 31-71008 carries a "Not For New Designs" product status, which may impact long-term availability and support for new product development.

For Reference Only (Amphenol RF 142222-75):

This part is not suitable for direct substitution due to incompatible connector style (SMB mini versus BNC) and connector type (female socket versus male pin). Mechanical and electrical interfaces are not compatible with the original specification.

Frequently Asked Questions (FAQ)

Q: Can Amphenol RF 31-71008 be used as a direct replacement for Molex 0731740113?

A: Yes. Both parts share identical connector style (BNC), connector type (plug, male pin), impedance (75 ohms), termination methods (crimp or solder), mounting configuration (free hanging, in-line), and fastening mechanism (bayonet lock). Mating cycle ratings and RoHS3 compliance are equivalent. The Amphenol RF part supports an expanded cable group range and provides additional electrical specifications.

Q: What is the significance of the "Not For New Designs" status on Amphenol RF 31-71008?

A: This designation indicates that while the part remains available and functional, the manufacturer does not recommend its use in new product designs. This may reflect manufacturing phase-out plans or preference for newer alternatives. For new designs, the active-status Molex 0731740113 is the preferred choice.

Q: Why is Amphenol RF 142222-75 listed if it is not interchangeable?

A: The part is included in the reference data provided but does not meet substitution criteria. It is a different connector family (SMB mini) with different gender configuration (female socket). It is not electrically or mechanically compatible and should not be considered for this application.

Q: Are there cable compatibility differences between the main part and Amphenol RF 31-71008?

A: The Molex 0731740113 is specified for RG-59 and 62A cable groups. The Amphenol RF 31-71008 supports these groups plus RG-59B, RG-62, RG-140, RG-210, and Belden 8241, 8263, 8279, and 9209 cables. Both parts maintain 75-ohm impedance matching across their respective cable groups.

Q: What are the packaging considerations for these parts?

A: Both the Molex 0731740113 and Amphenol RF 31-71008 are supplied in bulk packaging. The Molex part includes 3 pieces per connector (connector, contact, ferrule). The Amphenol RF part includes 4 pieces per connector (connector, bushing, contact, ferrule). Assembly and installation procedures should account for these component differences.