Pomona Electronics 4889 N Type Coaxial Connector - Equivalent & Substitute Parts

Part Overview

The Pomona Electronics 4889 is an N Type Connector Jack with female socket configuration, rated for 50 Ohms impedance, designed for panel mount applications with solder cup termination. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system maintenance and new design implementations. The 4889 features extended insulation, beryllium copper center contacts with gold plating, and brass body construction, all compliant with ROHS3 and REACH standards.

Substiute Parts

4889

Pomona ElectronicsIn Stock: 7934889 Datasheet

Current PartRFQ

2455

Pomona ElectronicsIn Stock: 8392455 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Pomona 4889 is determined by the following critical parameters:

• Connector Style & Type: N Type connector family with female socket configuration
• Impedance Rating: 50 Ohms (RF standard)
• Termination Method: Solder cup for both contact and shield
• Mounting Configuration: Panel mount with threaded fastening
• Material Specifications: Beryllium copper contacts with gold plating; brass body; PTFE dielectric
• Compliance Standards: ROHS3 and REACH compliance required

The Pomona 2455 qualifies as a functional substitute based on matching all critical electrical and mechanical parameters. Both components share identical connector style, impedance, termination method, mounting type, contact materials, and compliance certifications. The primary distinction lies in mounting feature configuration (bulkhead rear side nut versus flange) and product status (obsolete versus active).

Parameter Comparison

Engineering Selection Recommendations

The Pomona 2455 is the qualified substitute for the obsolete Pomona 4889 based on electrical and mechanical parameter equivalence. Both components maintain identical 50 Ohm impedance, solder cup termination, beryllium copper contact construction with gold plating, and PTFE dielectric specifications. Both are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The 2455 offers the advantage of active product status, ensuring continued availability and manufacturing support. The documented operating temperature range (-65°C ~ 165°C) and voltage rating (1000 V) for the 2455 provide explicit performance boundaries for system design applications. The primary mechanical difference—flange mounting versus bulkhead rear side nut configuration—requires verification against specific panel cutout and mechanical mounting requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can the Pomona 2455 directly replace the Pomona 4889 in existing designs?

A: The 2455 is electrically and mechanically equivalent for RF performance. Substitution requires verification that the flange mounting feature accommodates the existing panel geometry, as the 4889 uses bulkhead rear side nut configuration. Both components share identical 50 Ohm impedance, solder cup termination, and contact material specifications.

Q: What are the key differences between these two N Type connectors?

A: The primary differences are mounting feature design (flange versus bulkhead rear side nut) and product status (active versus obsolete). Electrical parameters, impedance, termination method, and material composition are identical. The 2455 includes documented operating temperature and voltage specifications.

Q: Are both connectors compliant with current regulatory standards?

A: Both the 4889 and 2455 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What termination method do these connectors use?

A: Both components utilize solder cup termination for both center contact and shield, enabling direct soldering to PCB traces or cable assemblies without requiring additional connectors or adapters.

Q: Is the 2455 available in the same packaging as the 4889?

A: The 2455 is supplied in bulk packaging. The 4889 includes three pieces per unit (1 connector, 1 lockwasher, 1 nut). Packaging configuration should be verified against procurement requirements.