APH-NJ-FJ Coaxial Connector Adapter Equivalent & Substitute Parts

Part Overview

The APH-NJ-FJ is a coaxial connector adapter manufactured by Amphenol RF that converts between N Jack female socket and F Jack female socket configurations. This adapter operates at 75 Ohms impedance and supports frequencies up to 1 GHz. The part is classified as obsolete, necessitating identification of active equivalent alternatives for continued procurement and system integration. Substitute parts must maintain identical electrical and mechanical compatibility while offering active product status and current availability.

Substiute Parts

APH-NJ-FJ

Amphenol RFIn Stock: 1022APH-NJ-FJ Datasheet

Current PartRFQ

242120-75

Amphenol RFIn Stock: 1295242120-75 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the APH-NJ-FJ is determined by strict equivalence across the following critical parameters:

Electrical Compatibility:

• Impedance: 75 Ohms (required match)
• Frequency maximum: 1 GHz (required match)
• Center gender configuration: Female to Female (required match)

Mechanical Compatibility:

• Adapter type: Jack to Jack (required match)
• Adapter series: N to F (required match)
• Mounting type: Free Hanging (In-Line) (required match)
• Fastening type: Threaded, Threaded (required match)
• Style: Straight (required match)

Material and Environmental Specifications:

• Body material: Brass with Nickel finish (required match)
• Center contact material: Phosphor Bronze with Gold plating (required match)
• Dielectric material: PTFE (required match)
• Operating temperature range: -65°C ~ 165°C (required match)

Regulatory Compliance:

• RoHS compliance status (required match or upgrade)
• ECCN and HTSUS classifications (required match)

The substitute part 242120-75 satisfies all critical parameters with directional reversal of the adapter conversion (F Jack to N Jack instead of N Jack to F Jack), which is functionally equivalent in application due to the symmetrical jack-to-jack configuration.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 242120-75 is the direct equivalent for APH-NJ-FJ replacement applications. Selection of 242120-75 is based on the following engineering criteria:

Product Status Upgrade: The APH-NJ-FJ is classified as obsolete, while 242120-75 maintains active product status with current manufacturing and availability. This transition ensures long-term supply chain continuity and access to current production batches.

Regulatory Compliance Enhancement: Both parts maintain RoHS compliance. The substitute part 242120-75 carries ROHS3 certification, representing an upgrade from the base RoHS Compliant status of the main part. Additionally, 242120-75 is REACH Affected, indicating compliance with current European chemical regulations.

Electrical and Mechanical Equivalence: All critical electrical parameters (75 Ohms impedance, 1 GHz frequency maximum, female-to-female center gender) and mechanical specifications (jack-to-jack adapter type, straight style, threaded fastening, free-hanging mounting) are identical between the two parts.

Material and Environmental Specifications: Construction materials, plating specifications, dielectric composition, and operating temperature range (-65°C ~ 165°C) are identical, ensuring thermal and environmental performance equivalence.

Directional Adapter Configuration: The substitute part 242120-75 reverses the adapter direction (F Jack to N Jack versus N Jack to F Jack). In jack-to-jack adapter applications, this directional reversal does not affect functional compatibility, as both configurations provide equivalent N-to-F series conversion capability.

Frequently Asked Questions (FAQ)

Q: Can 242120-75 directly replace APH-NJ-FJ in existing installations?

A: Yes. The 242120-75 provides direct functional replacement. Both parts are jack-to-jack adapters with identical impedance (75 Ohms), frequency rating (1 GHz), center gender configuration (female-to-female), and mechanical mounting specifications. The directional reversal of the adapter (F Jack to N Jack instead of N Jack to F Jack) does not affect compatibility in jack-to-jack applications.

Q: What is the significance of the directional difference between APH-NJ-FJ and 242120-75?

A: APH-NJ-FJ converts from N Jack female socket to F Jack female socket. The substitute 242120-75 converts from F Jack female socket to N Jack female socket. In practical application, both adapters achieve the same result: connecting N-series and F-series coaxial connectors. The directional designation reflects the labeling convention only; the physical adapter performs identically regardless of which end is designated as the input or output.

Q: Are there any compliance differences between the two parts?

A: Both parts are RoHS compliant. The substitute part 242120-75 carries ROHS3 certification and is REACH Affected, representing an upgrade in regulatory compliance status compared to the base RoHS Compliant designation of APH-NJ-FJ. Both parts share identical ECCN (EAR99) and HTSUS (8536.69.4010) classifications.

Q: What is the packaging difference between APH-NJ-FJ and 242120-75?

A: APH-NJ-FJ is supplied in unspecified packaging, while 242120-75 is supplied in bulk packaging. For procurement purposes, bulk packaging typically indicates standard industrial packaging suitable for component integration into larger assemblies or systems.

Q: Do both parts support the same operating temperature range?

A: Yes. Both APH-NJ-FJ and 242120-75 operate across the identical temperature range of -65°C to 165°C, ensuring equivalent thermal performance in environmental applications.

Q: Are the material specifications identical between the two parts?

A: Yes. Both parts feature brass bodies with nickel finish, phosphor bronze center contacts with gold plating, and PTFE dielectric material. These specifications are identical and ensure equivalent electrical performance and environmental durability.

Q: Why is APH-NJ-FJ classified as obsolete?

A: Product obsolescence typically reflects manufacturer discontinuation of production. The substitute part 242120-75 maintains active status, indicating current manufacturing and availability. For new designs or ongoing procurement, 242120-75 is the appropriate selection.

Q: What inventory levels are available for each part?

A: APH-NJ-FJ has 913 pieces in stock as new original inventory. The substitute part 242120-75 has 1204 pieces in stock as new original inventory. Current availability of 242120-75 supports immediate procurement requirements.