VB20-2051C BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The VB20-2051C is an active BNC connector plug manufactured by Cinch Connectivity Solutions, designed for RF coaxial applications requiring 50 Ohm impedance. This right-angle, free-hanging connector features crimp termination for both center contact and shield, supporting frequencies up to 4 GHz with RG-58 cable compatibility. The part is RoHS compliant and currently in active production status with 809 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the connector interface, enabling component interchangeability in system designs.

Key Parameters

Parameter	Value
Connector Style	BNC
Connector Type	Plug, Male Pin
Impedance	50 Ohms
Mounting Type	Free Hanging (In-Line), Right Angle
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Operating Temperature Range	-65°C ~ 165°C
Voltage Rating	500 V
Mating Cycles	500
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the VB20-2051C is determined by strict equivalence across the following critical parameters:

Connector Style: BNC (bayonet coupling mechanism)
Connector Type: Plug, Male Pin (mating interface configuration)
Impedance: 50 Ohms (electrical characteristic)
Mounting Type: Free Hanging (In-Line), Right Angle (physical orientation)
Fastening Type: Bayonet Lock (coupling method)
Frequency - Max: 4 GHz (operational bandwidth)
Operating Temperature Range: -65°C ~ 165°C (environmental limits)
Voltage Rating: 500 V (electrical stress rating)
Mating Cycles: 500 (mechanical durability specification)

The primary distinction between the main part and identified substitutes lies in contact termination method (crimp versus solder) and associated material finishes. These variations do not affect connector compatibility at the mating interface, as both termination types achieve equivalent electrical performance within the specified parameters.

Parameter Comparison

Parameter	VB20-2051C (Cinch)	1-1478075-0 (TE Connectivity)
Connector Style	BNC	BNC
Connector Type	Plug, Male Pin	Plug, Male Pin
Contact Termination	Crimp	Solder
Shield Termination	Crimp	Crimp
Impedance	50 Ohms	50 Ohms
Mounting Type	Free Hanging (In-Line), Right Angle	Free Hanging (In-Line), Right Angle
Fastening Type	Bayonet Lock	Bayonet Lock
Frequency - Max	4 GHz	4 GHz
Operating Temperature	-65°C ~ 165°C	-65°C ~ 165°C
Voltage Rating	500 V	500 V
Mating Cycles	500	500
Cable Group Compatibility	RG-58	RG-58C, 141A
Insertion Loss	0.2 dB	0.3 dB
RoHS Status	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both VB20-2051C and 1-1478075-0 maintain active product status and full RoHS compliance, qualifying both for use in applications requiring regulatory adherence. Selection between these parts is determined by termination method availability and cable assembly requirements. The VB20-2051C employs crimp termination, while 1-1478075-0 uses solder termination; both achieve equivalent electrical performance at the mating interface. Cable group compatibility differs slightly, with 1-1478075-0 supporting RG-58C and 141A in addition to RG-58. Insertion loss specification of 0.2 dB for VB20-2051C versus 0.3 dB for 1-1478075-0 reflects minor performance variation within acceptable RF connector tolerances. Component selection should align with existing cable assembly infrastructure and termination process capabilities within the manufacturing environment.

Frequently Asked Questions (FAQ)

Q: Can VB20-2051C and 1-1478075-0 be used interchangeably in the same application?

A: Yes, provided the application accommodates the termination method difference. Both connectors maintain identical BNC plug configuration, 50 Ohm impedance, bayonet fastening, and operating specifications. The VB20-2051C requires crimp termination tooling, while 1-1478075-0 requires solder termination equipment.

Q: What is the significance of the different insertion loss values?

A: VB20-2051C specifies 0.2 dB insertion loss while 1-1478075-0 specifies 0.3 dB. Both values fall within standard RF connector performance ranges. Selection should consider system-level signal budget requirements.

Q: Are both parts suitable for the same cable types?

A: VB20-2051C is specified for RG-58 cable. 1-1478075-0 supports RG-58C and 141A in addition to RG-58. Both connectors are mechanically and electrically compatible with RG-58 cable assemblies.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both VB20-2051C and 1-1478075-0 are RoHS compliant, rated for -65°C to 165°C operating temperature, and carry MSL 1 (Unlimited) moisture sensitivity classification. Both support 500 V voltage rating and 500 mating cycles.

Q: What determines whether a part qualifies as a substitute?

A: Substitution is based on equivalence across connector style, type, impedance, mounting configuration, fastening mechanism, frequency rating, temperature range, voltage rating, and mating cycle specification. Termination method differences do not prevent substitution when manufacturing processes support the required termination technique.

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