TE Connectivity 331350 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The TE Connectivity 331350 is a BNC connector plug designed for 50-ohm coaxial cable applications. This male pin connector features crimp termination for both center contact and shield, with a bayonet lock fastening mechanism. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain electrical performance at 50-ohm impedance, support equivalent cable groups, and operate within the same frequency range up to 4 GHz.

Key Parameters

Parameter	TE Connectivity 331350
Connector Style	BNC
Connector Type	Plug, Male Pin
Impedance	50 Ohms
Contact Termination	Crimp
Shield Termination	Crimp
Mounting Type	Free Hanging (In-Line)
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Voltage Rating	500 V
Cable Group	RG-59, 59A, 59B, 62, 62A, 62B
Center Contact Material	Brass
Center Contact Plating	Gold
Dielectric Material	Polytetrafluoroethylene (PTFE)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 331350 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Connector style: BNC
Connector type: Plug, Male Pin
Impedance: 50 Ohms
Contact termination: Crimp
Shield termination: Crimp
Mounting type: Free Hanging (In-Line)
Fastening type: Bayonet Lock
Frequency maximum: 4 GHz
Voltage rating: 500 V
Center contact material: Brass
Center contact plating: Gold

Cable Group Compatibility: Substitute parts are grouped by supported cable types. The original part 331350 supports RG-59, 59A, 59B, 62, 62A, and 62B cables. Substitutes are organized into distinct groups based on their specific cable compatibility, as different connector geometries accommodate different cable diameters and constructions.

Dielectric Material Consideration: While the original part uses PTFE dielectric, substitute parts may employ either PTFE or polyoxymethylene (POM) acetal. Both materials maintain electrical performance within the specified frequency and voltage parameters.

Product Status: Active substitute parts are preferred for new designs. Parts marked "Not For New Designs" remain functionally equivalent but should not be selected for new applications.

Parameter Comparison

Part Number	Manufacturer	Connector Style	Connector Type	Impedance	Contact Termination	Shield Termination	Mounting Type	Fastening Type	Frequency Max	Voltage Rating	Center Contact Material	Center Contact Plating	Product Status	Cable Group
331350	TE Connectivity Aerospace, Defense and Marine	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Discontinued	RG-59, 59A, 59B, 62, 62A, 62B
031-242-RFX	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-179, 179A, 179B, 187, 187A, Belden 9221, M17/94-RG179
031-315-1005	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-179, 188, 316 Double Braid, M17/152-RD316
031-325	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	AT&T 735, 735A, Belden 735A1
031-326	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp or Solder	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-55, 142, 223, 400
031-326-RFX	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Not For New Designs	RG-55, 142A, 223, 400
031-4321	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp or Solder	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-59, 59B, 62, 140, 210, Belden 8241, 8263, 8279, 9209
031-4427	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp or Solder	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-55, 142, 223, 400
031-6006	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	Belden 9258, LMR-240
31-242	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp or Solder	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-179, 179A, 179B, 187, 187A, Belden 9221, M17/94-RG179
31-315	Amphenol RF	BNC	Plug, Male Pin	50 Ohms	Crimp	Crimp	Free Hanging (In-Line)	Bayonet Lock	4 GHz	500 V	Brass	Gold	Active	RG-174, 188, 188A, 316, LMR-100, M17/119-RG174

Engineering Selection Recommendations

Primary Selection Criteria:

For applications currently using TE Connectivity 331350 with RG-59, 59A, 59B, 62, 62A, or 62B cables, the Amphenol RF 031-4321 is the direct functional equivalent. This part is active, ROHS3 compliant, and supports the identical cable group with matching electrical specifications. The 031-4321 accepts both crimp and solder termination, providing additional flexibility over the original crimp-only design.

Cable-Specific Substitution:

Selection of substitute parts must be based on the specific cable type in use:

RG-59/62 series cables: 031-4321 (Active status, silver body finish matching original)
RG-174/188/316 cables: 31-315 (Active status, 3183 units in stock)
RG-55/142/223/400 cables: 031-4427 (Active status, silver body finish)
Belden 9258 or LMR-240 cables: 031-6006 (Active status)
AT&T 735 series cables: 031-325 (Active status)

Compliance and Regulatory Status:

All recommended substitute parts maintain ROHS3 compliance equivalent to the original part. Amphenol RF substitutes carry REACH Affected status, indicating compliance with European chemical regulations. All parts are classified under ECCN EAR99 and HTSUS 8536.69.4010, matching the original classification.

Operational Temperature Range:

The original part does not specify operating temperature limits. All Amphenol RF substitutes operate across -65°C to 165°C, providing defined thermal performance for applications requiring temperature specifications.

Mating Cycles and Insertion Loss:

Substitute parts are rated for 500 mating cycles with 0.2 dB insertion loss, establishing quantified reliability and signal integrity parameters not provided for the original part.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the TE Connectivity 331350?

A: No. Substitution depends on cable type compatibility. The original part supports RG-59, 59A, 59B, 62, 62A, and 62B cables. Use 031-4321 for these cable types. Other substitutes are designed for different cable groups and will not provide proper mechanical fit or electrical performance with incompatible cables.

Q: What is the difference between crimp and crimp-or-solder termination options?

A: The original 331350 supports crimp termination only. Substitute parts 031-326, 031-4321, 031-4427, and 31-242 offer both crimp and solder options, allowing field termination flexibility. Parts 031-242-RFX, 031-315-1005, 031-325, 031-6006, and 31-315 support crimp termination only, matching the original specification.

Q: Why do some substitute parts have different body finishes (silver versus nickel)?

A: Body finish does not affect electrical performance within the specified frequency and voltage parameters. Silver finish (031-4321, 031-4427) matches the original part aesthetically. Nickel finish (031-242-RFX, 031-315-1005, 031-325, 031-326, 031-326-RFX, 031-6006, 31-242, 31-315) provides equivalent corrosion resistance and electrical conductivity.

Q: What does "Not For New Designs" status mean for part 031-326-RFX?

A: This designation indicates the part remains functionally equivalent and available but should not be selected for new product development. Active alternatives exist for the same cable groups. Use 031-4427 instead for RG-55, 142, 223, and 400 cable applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original TE Connectivity 331350 specification.

Q: What is the significance of the dielectric material difference between PTFE and POM acetal?

A: Both materials maintain electrical performance at 50-ohm impedance and 4 GHz frequency. PTFE (used in the original and most substitutes) offers superior high-frequency performance and temperature stability. POM acetal (used in 031-242-RFX and 031-326-RFX) provides equivalent performance within the specified parameters but with different mechanical properties. Selection should be based on cable compatibility, not dielectric material.

Q: How do I determine which substitute part is correct for my application?

A: Identify the cable type currently connected to the TE Connectivity 331350. Match this cable type to the cable group listed for each substitute part. For example, if using RG-59 cable, select 031-4321. If using RG-174 cable, select 31-315. Verify the substitute part's cable group includes your specific cable designation.

Q: What is the inventory status of substitute parts?

A: All listed substitute parts are in active stock with quantities ranging from 700 to 3183 units. The 31-315 has the highest availability at 3183 units. Verify current inventory with your supplier before finalizing procurement.

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