Amphenol RF 031-70237 BNC Connector Plug 75 Ohm Crimp

Part Overview

The Amphenol RF 031-70237 is a BNC connector plug with male pin configuration, designed for 75 ohm coaxial cable termination using crimp contact attachment. This component operates at frequencies up to 3 GHz and is compatible with AT&T 735, 735A, and Belden 735A1 cable groups. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Alternative equivalent and substitute parts are available to support ongoing maintenance, repair, and legacy system requirements.

Key Parameters

Parameter	Specification
Manufacturer Part Number	031-70237
Manufacturer	Amphenol RF
Connector Style	BNC
Connector Type	Plug, Male Pin
Impedance	75 Ohms
Contact Termination	Crimp
Shield Termination	Crimp
Mounting Type	Free Hanging (In-Line)
Fastening Type	Bayonet Lock
Frequency - Max	3 GHz
Voltage Rating	500 V
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the 031-70237 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Connector Style: BNC
Connector Type: Plug, Male Pin
Impedance: 75 Ohms
Contact Termination: Crimp
Shield Termination: Crimp
Mounting Type: Free Hanging (In-Line)
Fastening Type: Bayonet Lock
Voltage Rating: 500 V
Number of Ports: 1

Acceptable Variation Parameters:

Frequency - Max: Substitute parts may exceed the 3 GHz specification of the main part
Operating Temperature: Substitute parts may have wider or different temperature ranges
Body Material: Brass or Zinc acceptable
Cable Group Compatibility: Different cable groups acceptable if core electrical parameters match
Packaging: Bulk or Bag formats acceptable
Product Status: Active status preferred for new applications; Not For New Designs acceptable for legacy support

Substitute parts listed below meet all mandatory matching parameters and are electrically and mechanically compatible with the 031-70237 for direct replacement in existing installations.

Parameter Comparison

Parameter	031-70237 (Main)	112950 (Amphenol RF)	413589-6 (TE Connectivity)	5413589-6 (TE Connectivity)	UPL220-025 (Cinch)
Connector Style	BNC	BNC	BNC	BNC	BNC
Connector Type	Plug, Male Pin	Plug, Male Pin	Plug, Male Pin	Plug, Male Pin	Plug, Male Pin
Impedance	75 Ohms	75 Ohms	75 Ohms	75 Ohms	75 Ohms
Contact Termination	Crimp	Crimp	Crimp	Crimp	Crimp
Shield Termination	Crimp	Crimp	Crimp	Crimp	Crimp
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)	Free Hanging (In-Line)
Fastening Type	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock
Frequency - Max	3 GHz	4 GHz	2 GHz	2 GHz	4 GHz
Voltage Rating	500 V	500 V	500 V	500 V	500 V
Operating Temperature	-40°C ~ 85°C	Not Specified	-55°C ~ 85°C	-55°C ~ 85°C	-65°C ~ 165°C
Mating Cycles	500	500	500	500	Not Specified
Center Contact Material	Brass	Brass	Brass	Brass	Brass
Body Material	Brass	Brass	Zinc	Brass	Brass
Body Finish	Nickel	Nickel	Nickel	Nickel	Nickel
Center Contact Plating	Gold	Gold	Gold	Gold	Gold
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: Amphenol RF 112950

The 112950 is the direct manufacturer equivalent from Amphenol RF. It maintains identical electrical and mechanical specifications to the 031-70237 while offering Active product status. The 112950 supports higher frequency operation (4 GHz versus 3 GHz) and is ROHS3 compliant. This part is the preferred substitute for direct replacement in legacy systems and new installations requiring Amphenol RF components.

Secondary Substitute: Cinch Connectivity Solutions UPL220-025

The UPL220-025 provides equivalent electrical performance with extended operating temperature range (-65°C ~ 165°C) and higher frequency capability (4 GHz). This part is ROHS3 compliant and Active status. The UPL220-025 is suitable for applications requiring wider temperature operating margins or higher frequency headroom.

Alternative Substitute: TE Connectivity 5413589-6

The 5413589-6 offers RoHS compliance and Active product status with extended operating temperature range (-55°C ~ 85°C). This part uses brass body material matching the 031-70237 construction. The 5413589-6 is compatible with RG-59 double braid cable groups and provides equivalent mechanical and electrical performance within its 2 GHz frequency specification.

Not Recommended: TE Connectivity 413589-6

The 413589-6 is RoHS non-compliant and uses zinc body material. While electrically equivalent, regulatory compliance status and material composition make this part unsuitable for new applications or systems with RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can the 031-70237 be directly replaced with the 112950?

A: Yes. The 112950 is a direct equivalent from the same manufacturer with identical electrical and mechanical specifications. The 112950 is Active status and ROHS3 compliant, making it the preferred substitute for both legacy support and new installations.

Q: What is the difference between the Amphenol RF 112950 and the Cinch UPL220-025?

A: Both parts meet all mandatory electrical and mechanical parameters for substitution. The UPL220-025 offers extended operating temperature range (-65°C ~ 165°C versus unspecified for 112950) and is compatible with different cable groups (734A versus AT&T 735/735A/Belden 735A1). Both support 4 GHz frequency operation and are ROHS3 compliant. Selection depends on cable group compatibility and temperature operating requirements.

Q: Why is the TE Connectivity 413589-6 listed as a substitute if it is RoHS non-compliant?

A: The 413589-6 meets all mandatory electrical and mechanical substitution parameters and is electrically compatible with the 031-70237. However, RoHS non-compliance restricts its use to applications without regulatory requirements. The 5413589-6 variant is the recommended TE Connectivity option due to RoHS compliance.

Q: Does the frequency difference between the 031-70237 (3 GHz) and substitute parts (2-4 GHz) affect compatibility?

A: No. Substitute parts with higher frequency ratings (4 GHz) exceed the 031-70237 specification and are fully compatible. The 413589-6 and 5413589-6 with 2 GHz ratings are also compatible, as they meet the minimum frequency requirement for the 031-70237 application. Frequency rating represents the maximum operating capability, not a minimum requirement.

Q: What packaging differences exist between substitute parts?

A: The 031-70237 and UPL220-025 are supplied in Bulk packaging. The 112950 is supplied in Bag packaging. The TE Connectivity parts (413589-6 and 5413589-6) have unspecified packaging. Packaging format does not affect electrical or mechanical compatibility; selection depends on procurement and inventory management requirements.

Q: Are all substitute parts ROHS3 compliant?

A: The 031-70237, 112950, UPL220-025, and 5413589-6 are ROHS3 compliant. The 413589-6 is RoHS non-compliant. For applications with RoHS compliance requirements, use the 112950, UPL220-025, or 5413589-6.

Q: What cable groups are compatible with each substitute part?

A: The 031-70237 and 112950 support AT&T 735, 735A, and Belden 735A1 cable groups. The UPL220-025 supports 734A cable group. The TE Connectivity parts (413589-6 and 5413589-6) support RG-59 double braid cable group. Verify cable group compatibility with your specific installation requirements.

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