WVB-7-703N BNC Connector Jack Equivalent & Substitute Parts

Part Overview

The WVB-7-703N is a BNC connector jack manufactured by Winchester Interconnect, designed for RF coaxial applications requiring 75 Ohm impedance. This female socket connector features through-hole solder termination and is rated for operation across -65°C to 165°C with a maximum frequency of 4 GHz. The part is currently active in production with 885 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are preferred for supply chain diversification, or when application requirements allow for compatible impedance alternatives. The following equivalent parts maintain core BNC connector functionality while offering variations in impedance, materials, and operating temperature ranges.

Key Parameters

Parameter	WVB-7-703N
Connector Style	BNC
Connector Type	Jack, Female Socket
Impedance	75 Ohms
Mounting Type	Through Hole
Contact Termination	Solder
Shield Termination	Solder
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Voltage Rating	500 V
Operating Temperature	-65°C ~ 165°C
Mating Cycles	500
Body Material	Brass
Body Finish	Nickel
Center Contact Material	Phosphor Bronze
Center Contact Plating	Gold
Dielectric Material	Polytetrafluoroethylene (PTFE)
Insertion Loss	0.20 dB
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the WVB-7-703N are categorized based on impedance compatibility and operating parameter alignment. The substitution logic follows these criteria:

Primary Substitutes (75 Ohm Impedance - Direct Replacement)

Parts maintaining 75 Ohm impedance provide direct electrical compatibility without system redesign:

031-5329-72RFX (Amphenol RF)
71K101-400A5 (Rosenberger)

These parts preserve the impedance specification of the original part, ensuring signal integrity in 75 Ohm RF systems.

Secondary Substitutes (50 Ohm Impedance - System-Dependent)

Parts with 50 Ohm impedance are listed as substitutes based on the original part's documented substitute list. These parts are compatible only in applications where 50 Ohm impedance is acceptable:

031-5329-51RFX (Amphenol RF)
031-5329-52RFX (Amphenol RF)
1-1337445-0 (TE Connectivity AMP Connectors)
227699-1 (TE Connectivity AMP Connectors)
5221123-2 (TE Connectivity AMP Connectors)
5222420-1 (TE Connectivity AMP Connectors)
5413969-2 (TE Connectivity AMP Connectors)
6274315-1 (TE Connectivity AMP Connectors)

All substitute parts share the following core parameters with the main part:

BNC connector style with female socket configuration
Through-hole solder termination
Bayonet lock fastening
4 GHz maximum frequency
500 V voltage rating
500 mating cycles
Moisture Sensitivity Level 1 (Unlimited)
Silver housing color

Parameter Comparison

Part Number	Manufacturer	Impedance	Operating Temperature	Body Material	Center Contact Material	Dielectric Material	Insertion Loss	Voltage Rating	RoHS Status
WVB-7-703N	Winchester Interconnect	75 Ohms	-65°C ~ 165°C	Brass	Phosphor Bronze	PTFE	0.20 dB	500 V	Not specified
031-5329-51RFX	Amphenol RF	50 Ohms	-20°C ~ 165°C	Brass	Phosphor Bronze	PBT	0.2 dB	500 V	ROHS3 Compliant
031-5329-52RFX	Amphenol RF	50 Ohms	Not specified	Brass	Phosphor Bronze	PBT, Polyester	0.2 dB	500 V	ROHS3 Compliant
031-5329-72RFX	Amphenol RF	75 Ohms	Not specified	Brass	Phosphor Bronze	PBT, Polyester	0.2 dB	500 V	ROHS3 Compliant
1-1337445-0	TE Connectivity AMP Connectors	50 Ohms	-65°C ~ 165°C	Brass	Brass	PTFE	Not specified	500 V	ROHS3 Compliant
227699-1	TE Connectivity AMP Connectors	50 Ohms	-55°C ~ 85°C	Zinc	Phosphor Bronze	PBT, Polyester	Not specified	500 V	RoHS Compliant
5221123-2	TE Connectivity AMP Connectors	50 Ohms	-55°C ~ 85°C	Zinc	Phosphor Bronze	Polyester	Not specified	500 V	ROHS3 Compliant
5222420-1	TE Connectivity AMP Connectors	50 Ohms	-55°C ~ 85°C	Brass	Phosphor Bronze	Polyester	Not specified	500 V	RoHS Compliant
5413969-2	TE Connectivity AMP Connectors	50 Ohms	-55°C ~ 85°C	Zinc	Beryllium Copper	PTFE	Not specified	500 V	ROHS3 Compliant
6274315-1	TE Connectivity AMP Connectors	50 Ohms	-55°C ~ 85°C	Zinc	Phosphor Bronze	PPO	Not specified	500 V	ROHS3 Compliant
71K101-400A5	Rosenberger	75 Ohms	-65°C ~ 165°C	Brass	Beryllium Copper	PTFE	Not specified	400 V	RoHS Compliant

Engineering Selection Recommendations

For Direct 75 Ohm Replacement:

The 031-5329-72RFX (Amphenol RF) and 71K101-400A5 (Rosenberger) maintain the 75 Ohm impedance specification of the WVB-7-703N. Both parts are active products with ROHS3 or RoHS compliance. The 031-5329-72RFX offers ROHS3 compliance and 1,395 units in stock. The 71K101-400A5 provides RoHS compliance with 1,209 units available; however, this part has a 400 V voltage rating compared to the 500 V rating of the main part.

For 50 Ohm Applications:

When system requirements permit 50 Ohm impedance operation, multiple substitutes are available from TE Connectivity AMP Connectors and Amphenol RF. The 5413969-2 offers the highest inventory (5,912 units) with ROHS3 compliance, PTFE dielectric, and Beryllium Copper center contact material. The 1-1337445-0 maintains the full -65°C to 165°C operating temperature range of the original part and includes PTFE dielectric material, with 2,400 units in stock.

Temperature Range Considerations:

Applications requiring the full -65°C to 165°C operating temperature range should prioritize the 1-1337445-0 (TE Connectivity) or 71K101-400A5 (Rosenberger) for 50 Ohm and 75 Ohm applications respectively. Most TE Connectivity 50 Ohm alternatives operate within -55°C to 85°C, which is narrower than the original specification.

Compliance Status:

All substitute parts carry either RoHS or ROHS3 compliance. The Amphenol RF parts (031-5329-51RFX, 031-5329-52RFX, 031-5329-72RFX) and most TE Connectivity parts are ROHS3 compliant. All parts maintain Moisture Sensitivity Level 1 (Unlimited) and carry the same ECCN and HTSUS classifications as the main part.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 Ohm BNC connector in place of the 75 Ohm WVB-7-703N?

A: Impedance compatibility depends on system design. If the application is designed for 75 Ohm impedance, using a 50 Ohm connector introduces impedance mismatch, which causes signal reflections and increased insertion loss. Use 50 Ohm substitutes only when the system is designed to operate at 50 Ohm impedance or when impedance tolerance is specified in the application requirements.

Q: What is the difference between the Amphenol RF 031-5329-72RFX and the main part WVB-7-703N?

A: Both parts maintain 75 Ohm impedance, through-hole solder termination, and 4 GHz maximum frequency. The 031-5329-72RFX uses PBT/Polyester dielectric material instead of PTFE, and operating temperature range is not specified for this part. The 031-5329-72RFX carries ROHS3 compliance and has 1,395 units in stock.

Q: Why do some substitute parts have lower operating temperature ranges?

A: Operating temperature range is determined by dielectric material properties and component design. Many TE Connectivity 50 Ohm alternatives operate within -55°C to 85°C due to their dielectric material composition (PBT, Polyester, or PPO). For applications requiring -65°C to 165°C operation, select parts with documented full temperature range specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry either RoHS or ROHS3 compliance certification. The Amphenol RF parts and most TE Connectivity parts are ROHS3 compliant. The 227699-1 and 5222420-1 carry RoHS compliance. The main part WVB-7-703N does not specify RoHS status.

Q: What is the significance of center contact material differences?

A: Center contact material affects electrical performance and durability. The main part uses Phosphor Bronze with gold plating. Substitute parts use Phosphor Bronze, Brass, or Beryllium Copper with various plating options (Gold or Silver). These variations maintain electrical performance within the 4 GHz frequency range and 500 mating cycle specification.

Q: Can I substitute the Rosenberger 71K101-400A5 for the WVB-7-703N?

A: The 71K101-400A5 maintains 75 Ohm impedance and the full -65°C to 165°C operating temperature range. However, this part has a 400 V voltage rating compared to the 500 V rating of the WVB-7-703N. Use this substitute only when the application voltage requirement does not exceed 400 V.

Q: What inventory levels are available for the primary 75 Ohm substitutes?

A: The 031-5329-72RFX (Amphenol RF) has 1,395 units in stock. The 71K101-400A5 (Rosenberger) has 1,209 units in stock. The original WVB-7-703N has 885 units in stock.

Q: Do all parts use the same dielectric material?

A: No. The main part uses PTFE dielectric. Substitute parts use PTFE, PBT, Polyester, or PPO dielectric materials. PTFE provides superior high-frequency performance and temperature stability. Parts using PBT or Polyester dielectric are suitable for the 4 GHz frequency specification but may have different temperature performance characteristics.

Q: What is the insertion loss specification for substitute parts?

A: The main part WVB-7-703N specifies 0.20 dB insertion loss. The Amphenol RF substitutes (031-5329-51RFX, 031-5329-52RFX, 031-5329-72RFX) specify 0.2 dB insertion loss. Most TE Connectivity and Rosenberger substitutes do not provide insertion loss specifications in the available data.

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