APH-SMAJ-BNCJ Equivalent & Substitute Parts

Part Overview

The APH-SMAJ-BNCJ is a coaxial adapter connector manufactured by Amphenol RF that converts between BNC Jack (female socket) and SMA Jack (female socket) interfaces. This adapter operates at 50 Ohms impedance and supports frequencies up to 4 GHz. The part is classified as Obsolete, necessitating identification of active equivalent alternatives for continued procurement and system integration. Substitute parts maintain functional compatibility while offering current product status and updated compliance certifications.

Substiute Parts

APH-SMAJ-BNCJ

Amphenol RFIn Stock: 1278APH-SMAJ-BNCJ Datasheet

Current PartRFQ

242123

Amphenol RFIn Stock: 1231242123 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the APH-SMAJ-BNCJ is determined by equivalence across the following critical parameters:

Mechanical Compatibility:

• Adapter type (Jack to Jack)
• Mounting configuration (Free Hanging, In-Line)
• Fastening mechanism (Bayonet Lock, Threaded)
• Physical style (Straight)

Electrical Compatibility:

• Impedance (50 Ohms)
• Maximum frequency (4 GHz)
• Operating temperature range (-65°C ~ 165°C)
• Center contact plating (Gold)

Material Specifications:

• Body material (Brass with Nickel finish)
• Center contact material (Phosphor Bronze)
• Dielectric material (PTFE)

Environmental & Regulatory:

• Moisture Sensitivity Level (MSL 1)
• RoHS compliance status

The substitute part 242123 maintains all critical parameters while differing only in the directional orientation of the conversion (SMA Jack to BNC Jack versus BNC Jack to SMA Jack), which does not affect functional compatibility in adapter applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 242123

The part 242123 is the direct equivalent substitute for APH-SMAJ-BNCJ. Selection of 242123 is based on the following engineering criteria:

Product Status: Part 242123 maintains Active product status, ensuring continued availability and manufacturer support. The APH-SMAJ-BNCJ is classified as Obsolete, making 242123 the appropriate selection for new designs and ongoing procurement.

Compliance Certifications: Part 242123 carries ROHS3 compliance, representing the current regulatory standard. Both parts maintain EAR99 export classification and identical HTSUS codes, confirming regulatory equivalence.

Electrical and Mechanical Equivalence: All critical parameters remain identical between the two parts, including impedance (50 Ohms), frequency rating (4 GHz), operating temperature range (-65°C ~ 165°C), and physical configuration (Jack to Jack, Straight, Free Hanging).

Material Specifications: Both parts utilize identical materials: Brass body with Nickel finish, Phosphor Bronze center contacts with Gold plating, and PTFE dielectric. These specifications ensure signal integrity and environmental durability across the operating range.

Packaging Consideration: Part 242123 is supplied in Bag packaging, whereas the original part packaging is not specified. This difference does not affect functional performance or system integration.

Frequently Asked Questions (FAQ)

Q: Can 242123 be used as a direct replacement for APH-SMAJ-BNCJ in existing systems?

A: Yes. Both parts maintain identical electrical specifications (50 Ohms, 4 GHz maximum frequency), mechanical configuration (Jack to Jack, Straight, Free Hanging), and material composition. The parts are functionally equivalent for all RF applications within the specified operating parameters.

Q: What is the difference between APH-SMAJ-BNCJ and 242123?

A: The primary difference is product status. APH-SMAJ-BNCJ is Obsolete, while 242123 is Active. Additionally, 242123 carries ROHS3 compliance versus RoHS compliance for the original part. The directional orientation of the conversion (BNC Jack to SMA Jack versus SMA Jack to BNC Jack) does not affect functional compatibility in adapter applications. Both parts are electrically and mechanically equivalent.

Q: Are there any frequency or impedance limitations when using 242123?

A: No. Part 242123 maintains the same frequency rating (4 GHz maximum) and impedance (50 Ohms) as the original APH-SMAJ-BNCJ. Both parts are suitable for identical RF applications within these specifications.

Q: What is the operating temperature range for 242123?

A: The operating temperature range is -65°C to 165°C, identical to the original part. This range supports both industrial and military-grade applications.

Q: Does the packaging format of 242123 affect its performance?

A: No. Part 242123 is supplied in Bag packaging. Packaging format does not affect electrical performance, mechanical compatibility, or signal integrity. The connector specifications and material composition remain unchanged.

Q: Are both parts RoHS compliant?

A: Yes. APH-SMAJ-BNCJ is RoHS Compliant, and 242123 is ROHS3 Compliant. Both meet current environmental and regulatory requirements. ROHS3 represents the current regulatory standard.

Q: Can these adapters be used in high-frequency applications?

A: Both APH-SMAJ-BNCJ and 242123 are rated for frequencies up to 4 GHz. Applications requiring operation above this frequency require alternative connector specifications.

Q: What materials are used in the center contact?

A: Both parts use Phosphor Bronze center contacts with Gold plating. This material combination provides reliable electrical contact and corrosion resistance across the operating temperature range.