Amphenol RF 142254 SMB Coaxial Connector Equivalent & Substitute Parts

Part Overview

The Amphenol RF 142254 is an SMB connector plug with female socket configuration, designed for 50-ohm RF applications. This free-hanging (in-line) connector features solder termination for the center contact and crimp termination for the shield. The part is actively manufactured and maintains full RoHS3 and REACH compliance. Substitute parts are identified when inventory constraints, packaging requirements, or specific termination preferences necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

142254

Amphenol RFIn Stock: 811142254 Datasheet

Current PartRFQ

131-9403-021

Cinch Connectivity SolutionsIn Stock: 1190131-9403-021 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Amphenol RF 142254 is determined by strict alignment with the following critical parameters:

Critical Electrical Parameters:

• Connector style must be SMB
• Connector type must be Plug with Female Socket configuration
• Impedance must be 50 Ohms
• Maximum frequency must be 4 GHz or greater
• Operating temperature range must encompass -65°C to 165°C
• Voltage rating must be 335 V or greater
• Mating cycle rating must be 500 or greater
• Insertion loss must not exceed 0.3 dB

Critical Mechanical Parameters:

• Mounting type must be Free Hanging (In-Line)
• Fastening type must be Snap-On
• Dielectric material must be Polytetrafluoroethylene (PTFE)

Compliance Parameters:

• RoHS3 compliance required
• REACH compliance required
• Moisture Sensitivity Level must be 1 (Unlimited)

Application-Dependent Parameters:

• Contact termination may be Solder or Crimp or Solder (interchangeable based on application requirements)
• Cable group compatibility varies by application; connector must support intended cable type

The Cinch Connectivity Solutions 131-9403-021 qualifies as a substitute based on matching all critical electrical and mechanical parameters, maintaining equivalent compliance certifications, and offering flexible termination options (Crimp or Solder) that accommodate the primary part's solder termination requirement.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (Amphenol RF 142254): The Amphenol RF 142254 is the specified component and remains the first choice when available. This part is actively manufactured, maintains full RoHS3 and REACH compliance, and carries MSL 1 (Unlimited) moisture sensitivity rating. The solder termination is fixed, making this part suitable for applications requiring direct solder attachment to PCB pads or cable conductors.

Substitute Part Selection (Cinch Connectivity Solutions 131-9403-021): The Cinch Connectivity Solutions 131-9403-021 qualifies as a direct substitute when the primary part is unavailable or when bulk packaging is preferred. This part maintains identical electrical performance across all critical parameters: 50-ohm impedance, 4 GHz maximum frequency, 335 V voltage rating, 500 mating cycles, and 0.3 dB insertion loss. Both parts operate across the identical temperature range (-65°C to 165°C) and maintain equivalent compliance certifications (RoHS3, REACH, MSL 1).

Key Differentiation: The primary distinction between these parts is the contact termination flexibility and body finish. The Cinch part offers both Crimp and Solder termination options, providing application flexibility. The body finish differs (Nickel on Amphenol versus Gold on Cinch), which does not affect electrical performance but may influence corrosion resistance in specific environmental conditions. Both parts include identical component sets (1 Connector, 1 Contact, 1 Ferrule/Sleeve).

Cable Compatibility Consideration: The Amphenol RF 142254 supports cable groups RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, and 9907. The Cinch substitute supports cable groups RG-161, 174, 179, 187, 188, and 316. Cable group compatibility must be verified against the specific application requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can the Cinch Connectivity Solutions 131-9403-021 be used as a direct replacement for the Amphenol RF 142254?

A: The Cinch part qualifies as a substitute based on matching all critical electrical parameters (50-ohm impedance, 4 GHz frequency, 335 V voltage rating, 500 mating cycles, 0.3 dB insertion loss) and mechanical specifications (SMB Plug Female Socket, Free Hanging In-Line, Snap-On fastening, PTFE dielectric). However, cable group compatibility must be verified. The Amphenol part supports RG-58 series and LMR-195 cables, while the Cinch part supports RG-161, 174, 179, 187, 188, and 316 cables. Substitution is valid only when the application cable type is supported by the substitute part.

Q: What is the difference in termination between these two parts?

A: The Amphenol RF 142254 features fixed Solder termination for the center contact. The Cinch Connectivity Solutions 131-9403-021 offers flexible termination, supporting both Crimp and Solder options. Both parts use Crimp termination for the shield. The flexible termination on the Cinch part allows adaptation to different assembly processes without requiring a different part number.

Q: Are the compliance certifications identical between these parts?

A: Yes. Both parts maintain RoHS3 compliance, REACH compliance, and MSL 1 (Unlimited) moisture sensitivity rating. Both are classified under ECCN EAR99 and HTSUS 8536.69.4010. Compliance certifications are equivalent and do not restrict substitution from a regulatory standpoint.

Q: Why do the body materials differ between these parts?

A: The Amphenol RF 142254 uses Brass with Nickel finish, while the Cinch Connectivity Solutions 131-9403-021 uses Copper Alloy with Gold finish. Both material combinations provide equivalent electrical performance and mechanical durability. The material difference does not affect impedance, frequency response, or insertion loss. Material selection may influence corrosion resistance in specific environmental conditions; application environment should be considered when selecting between these options.

Q: What is included in each connector package?

A: Both parts include three components: 1 Connector, 1 Contact, and 1 Ferrule (Amphenol) or Sleeve (Cinch). The functional equivalence of the ferrule and sleeve ensures identical assembly and performance characteristics.

Q: Can these connectors be used interchangeably in the same assembly?

A: Interchangeability is limited to applications where cable group compatibility aligns with the substitute part's supported cable types. The Amphenol part is optimized for RG-58 series and LMR-195 cables, while the Cinch part is optimized for RG-161, 174, 179, 187, 188, and 316 cables. If the application uses a cable type supported by both parts, interchangeability is valid. If the application requires a cable type supported only by one part, that part must be used.

Q: What is the maximum operating frequency for these connectors?

A: Both the Amphenol RF 142254 and Cinch Connectivity Solutions 131-9403-021 are rated for a maximum frequency of 4 GHz. This specification is identical across both parts and represents the upper frequency limit for reliable operation within specified insertion loss parameters.

Q: Are there any environmental operating limitations?

A: Both parts operate across the identical temperature range of -65°C to 165°C. Both maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating no moisture-related storage or handling restrictions. Environmental operating limitations are equivalent between the two parts.