Pomona Electronics 6703 BNC Connector Plug - Equivalent & Substitute Parts

Part Overview

The Pomona Electronics 6703 is a BNC connector plug designed for 75-ohm coaxial cable applications, specifically compatible with RG-6 and Belden 1694A cables. This male pin connector features solder termination for the center contact and crimp termination for the shield, with a bayonet lock fastening mechanism. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system maintenance and component sourcing.

Substiute Parts

6703

Pomona ElectronicsIn Stock: 7016703 Datasheet

Current PartRFQ

HBC1694A

Winchester InterconnectIn Stock: 2485HBC1694A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Pomona Electronics 6703 is determined by the following critical parameters:

• Connector Style & Type: Must be BNC plug with male pin configuration to maintain mechanical compatibility with existing mating receptacles
• Impedance: Must be 75 ohms to preserve signal integrity in RF applications
• Mounting Type: Must be free hanging (in-line) to match the original form factor
• Fastening Type: Must use bayonet lock mechanism for proper connection security
• Cable Compatibility: Must support Belden 1694A cable group
• Termination Methods: Center contact and shield termination approaches must be compatible with system assembly requirements
• Electrical Performance: Operating temperature range, voltage rating, and insertion loss must meet or exceed original specifications

The Winchester Interconnect HBC1694A qualifies as a substitute based on these parameters, with the following considerations: it maintains BNC plug configuration, 75-ohm impedance, free hanging mounting, bayonet lock fastening, and Belden 1694A cable compatibility. The substitute uses crimp termination for the center contact rather than solder, which represents a functional difference in assembly methodology.

Parameter Comparison

Engineering Selection Recommendations

The Winchester Interconnect HBC1694A (part number HBC1694A) is an active substitute for the obsolete Pomona Electronics 6703. Selection should be based on the following factors:

Product Status: The Pomona 6703 is obsolete, while the Winchester HBC1694A is active and currently in production with 2452 units in stock, ensuring long-term availability for component sourcing and system maintenance.

Compliance & Certifications: Both connectors maintain RoHS compliance. The Winchester HBC1694A carries RoHS Compliant status, while the original Pomona part is ROHS3 Compliant. Both are EAR99 classified and REACH unaffected, meeting regulatory requirements for industrial and commercial applications.

Functional Compatibility: The substitute maintains electrical and mechanical compatibility across all critical parameters: 75-ohm impedance, bayonet lock fastening, free hanging mounting, and Belden 1694A cable support. Operating temperature range (-55°C ~ 200°C) and voltage rating (500 V) are identical.

Frequency Specification Difference: The original Pomona 6703 supports frequencies up to 3 GHz, while the Winchester HBC1694A is rated to 1 GHz. This represents a reduced frequency capability in the substitute. Applications operating above 1 GHz require evaluation against actual system frequency requirements.

Termination Methodology: The primary functional difference is center contact termination: the original uses solder termination, while the substitute uses crimp termination. This affects assembly procedures but does not impact electrical performance or mechanical fit.

Packaging & Availability: The Winchester part is supplied in bulk packaging with significantly higher inventory availability, supporting volume requirements and reducing lead times compared to the obsolete original.

Frequently Asked Questions (FAQ)

Q: Can the Winchester HBC1694A directly replace the Pomona 6703 in existing assemblies?

A: The Winchester HBC1694A is mechanically and electrically compatible with the Pomona 6703 for applications operating at frequencies up to 1 GHz. Both connectors use identical bayonet lock fastening, 75-ohm impedance, and support Belden 1694A cables. The primary difference is center contact termination method (crimp vs. solder), which affects assembly procedures but not connector performance or fit.

Q: What is the frequency limitation difference between these connectors?

A: The Pomona 6703 is rated to 3 GHz maximum frequency, while the Winchester HBC1694A is rated to 1 GHz. For applications requiring operation above 1 GHz, the substitute may not meet performance specifications. Verify actual system frequency requirements before selection.

Q: Are both connectors RoHS compliant?

A: Yes. The Pomona 6703 is ROHS3 Compliant, and the Winchester HBC1694A is RoHS Compliant. Both meet regulatory requirements for restricted substance use in electronic components.

Q: What is the difference between solder and crimp termination for the center contact?

A: The Pomona 6703 uses solder termination, requiring heat-based assembly methods. The Winchester HBC1694A uses crimp termination, requiring mechanical crimping tools. Both methods provide reliable electrical connections; selection depends on available assembly equipment and process requirements.

Q: Are the operating temperature ranges identical?

A: Yes. Both connectors operate across the same temperature range: -55°C to 200°C, ensuring compatibility in thermal environments.

Q: What is the insertion loss specification for both connectors?

A: Both connectors specify 0.2 dB insertion loss, indicating identical RF performance characteristics.

Q: Is the Winchester HBC1694A currently available?

A: Yes. The Winchester HBC1694A is an active product with 2452 units in stock, providing reliable availability for component sourcing and system maintenance.