VB336 BNC Connector Jack 50 Ohm PCB Equivalent & Substitute Parts

Part Overview

The VB336 is a BNC connector jack (female socket) manufactured by Cinch Connectivity Solutions, designed for 50 ohm coaxial applications with through-hole solder termination on printed circuit boards. This connector operates at frequencies up to 4 GHz and is rated for 500 volts with 500 mating cycles. The part is currently active and RoHS compliant, making it suitable for modern electronic assemblies requiring RF connectivity.

Equivalent and substitute parts become necessary when the primary part experiences supply constraints, inventory limitations, or when design flexibility allows for alternative manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	VB336 Specification
Connector Style	BNC
Connector Type	Jack, Female Socket
Impedance	50 Ohms
Mounting Type	Through Hole
Contact Termination	Solder
Shield Termination	Solder
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Number of Ports	1
Voltage Rating	500 V
Mating Cycles	500
Insertion Loss	0.2 dB
Operating Temperature	-65°C ~ 165°C
Dielectric Material	Polytetrafluoroethylene (PTFE)
Body Material	Brass
Body Finish	Silver
Center Contact Plating	Gold
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the VB336 is determined by strict adherence to the following critical parameters:

Core Electrical Parameters (Non-Negotiable):

Connector Style: BNC
Connector Type: Jack, Female Socket
Impedance: 50 Ohms
Frequency - Max: 4 GHz
Voltage Rating: 500 V
Insertion Loss: 0.2 dB

Core Mechanical Parameters (Non-Negotiable):

Mounting Type: Through Hole
Contact Termination: Solder
Shield Termination: Solder
Fastening Type: Bayonet Lock
Number of Ports: 1

Allowed Variation Parameters:

Manufacturer (Cinch Connectivity Solutions, Amphenol RF, Pomona Electronics)
Body Finish (Silver, Nickel, Tin)
Center Contact Material (Brass, Phosphor Bronze, Beryllium Copper)
Dielectric Material (PTFE, PBT)
Packaging (Bulk, Bag)
Product Status (Active, Not For New Designs)
RoHS Compliance Level (RoHS Compliant, ROHS3 Compliant)

All substitute parts listed maintain identical electrical performance and mechanical compatibility while allowing for material and finish variations that do not affect functional interchangeability.

Parameter Comparison

Part Number	Manufacturer	Connector Style	Impedance	Frequency Max	Voltage Rating	Insertion Loss	Body Finish	Center Contact Material	Dielectric Material	Product Status	RoHS Status
VB336	Cinch Connectivity Solutions	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Silver	Brass	PTFE	Active	RoHS Compliant
VB334N	Cinch Connectivity Solutions	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Brass	PTFE	Active	RoHS Compliant
VB335	Cinch Connectivity Solutions	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Tin	Brass	PTFE	Active	ROHS3 Compliant
112404	Amphenol RF	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Phosphor Bronze	PTFE	Active	ROHS3 Compliant
112406	Amphenol RF	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Phosphor Bronze	PTFE	Active	ROHS3 Compliant
112515	Amphenol RF	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Phosphor Bronze	PTFE	Active	ROHS3 Compliant
112538	Amphenol RF	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Phosphor Bronze	PBT	Not For New Designs	ROHS3 Compliant
112553	Amphenol RF	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Phosphor Bronze	PTFE	Active	ROHS3 Compliant
4578	Pomona Electronics	BNC	50 Ohms	4 GHz	500 V	0.2 dB	Nickel	Beryllium Copper	PTFE	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, PTFE Dielectric): VB334N, VB335, 112404, 112406, 112515, 112553, and 4578 are all active parts suitable for new designs. These parts maintain full electrical and mechanical compatibility with VB336 while offering alternative body finishes and center contact materials. Selection among these parts depends on procurement availability and specific assembly requirements.

Secondary Substitute (Not For New Designs): Part 112538 carries a "Not For New Designs" status and should be used only when existing inventory constraints require substitution in legacy applications or when design revision is not feasible. This part uses PBT dielectric material instead of PTFE, which remains functionally equivalent for the specified electrical parameters.

Compliance Considerations: VB336 is RoHS Compliant. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant, ensuring regulatory alignment for both legacy and current manufacturing standards. Parts designated as ROHS3 Compliant meet enhanced environmental requirements and are preferred for new product designs.

Frequently Asked Questions (FAQ)

Q: Can VB334N, VB335, or other Cinch parts directly replace VB336? A: Yes. VB334N and VB335 are direct electrical and mechanical equivalents manufactured by Cinch Connectivity Solutions. The primary differences are body finish (Nickel for VB334N, Tin for VB335) and RoHS compliance level (ROHS3 for VB335). These variations do not affect connector performance or interchangeability.

Q: What is the difference between Amphenol RF parts (112404, 112406, 112515, 112553) and the Cinch VB336? A: Amphenol RF parts are functionally equivalent BNC connectors with identical electrical specifications. The primary differences are center contact material (Phosphor Bronze instead of Brass) and body finish (Nickel). These materials maintain the same impedance, frequency response, and voltage rating as VB336.

Q: Why does 112538 have a "Not For New Designs" status? A: Part 112538 uses PBT dielectric material instead of PTFE. While electrically equivalent, this part is marked obsolete for new designs. It should only be used for legacy applications or when design revision is not possible.

Q: Does the body finish (Silver, Nickel, Tin) affect electrical performance? A: No. Body finish variations do not affect the electrical characteristics of the connector. All finishes provide equivalent shielding and RF performance at 4 GHz and below.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts are either RoHS Compliant or ROHS3 Compliant, meeting current environmental regulations.

Q: What is the difference between Pomona Electronics 4578 and other substitutes? A: Part 4578 uses Beryllium Copper for the center contact instead of Brass or Phosphor Bronze. This material provides equivalent electrical performance and is suitable for applications requiring enhanced contact durability.

Q: Can I mix different substitute parts in the same assembly? A: Yes. All substitute parts maintain identical electrical and mechanical specifications, allowing mixed usage within the same PCB assembly without performance degradation.

Q: Does packaging type (Bulk vs. Bag) affect part compatibility? A: No. Packaging type is a logistics consideration only and does not affect connector functionality or interchangeability.

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