Amphenol RF 182118 Equivalent & Substitute Parts

Part Overview

The Amphenol RF 182118 is a Mini UHF connector plug designed for RF coaxial applications with 50-ohm impedance. This component functions as a male pin connector with solder termination for cable attachment and crimp shield termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility, mechanical fit, and performance characteristics within the specified operating parameters.

Substiute Parts

182118

Amphenol RFIn Stock: 734182118 Datasheet

Current PartRFQ

182325

Amphenol RFIn Stock: 928182325 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Amphenol RF 182118 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Impedance: 50 Ohms (mandatory match)
• Frequency - Max: 2.5 GHz (minimum requirement)
• Voltage Rating: 335 V (minimum requirement)
• Operating Temperature Range: -55°C ~ 85°C (mandatory match)

Mechanical Compatibility Requirements:

• Connector Style: UHF, Mini (mandatory match)
• Connector Type: Plug, Male Pin (mandatory match)
• Contact Termination: Solder (mandatory match)
• Shield Termination: Crimp (mandatory match)
• Fastening Type: Threaded (mandatory match)
• Number of Ports: 1 (mandatory match)

Material and Construction Requirements:

• Center Contact Material: Brass
• Body Material: Brass
• Body Finish: Nickel
• Center Contact Plating: Gold

Substitute parts must satisfy all mandatory electrical and mechanical parameters. Variations in mounting type (straight versus right angle) are permissible when the connector maintains the same functional interface and electrical performance within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Amphenol RF 182325

The Amphenol RF 182325 is the qualified substitute for the obsolete 182118. Both components are manufactured by Amphenol RF and maintain identical electrical specifications across all critical parameters: 50-ohm impedance, 2.5 GHz maximum frequency, 335 V voltage rating, and -55°C to 85°C operating temperature range.

The 182325 differs from the 182118 in mounting orientation, offering a right-angle configuration in addition to the straight in-line mounting. This variation does not affect electrical compatibility or functional performance within the specified operating envelope. The substitute part is currently in active production status with 886 units in stock inventory, ensuring supply chain continuity.

Both parts comply with RoHS3 requirements and carry identical ECCN (EAR99) and HTSUS (8536.69.4010) classifications. The 182325 utilizes PTFE dielectric material compared to the 182118's polyoxymethylene (POM) acetal, which represents an improvement in high-frequency performance characteristics.

Selection of the 182325 as a direct substitute is appropriate for applications where the right-angle mounting orientation is compatible with the circuit board layout and cable routing requirements.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol RF 182325 be used as a direct replacement for the 182118 in existing designs?

A: The 182325 is electrically and mechanically compatible with the 182118 across all critical parameters. The primary difference is the mounting orientation: the 182325 offers right-angle configuration in addition to straight in-line mounting. Compatibility depends on whether the circuit board layout and cable routing can accommodate the right-angle connector geometry. If straight in-line mounting is required, the 182325 straight variant must be specified.

Q: What are the key electrical parameters that must match between the main part and substitute?

A: The following parameters must match exactly: 50-ohm impedance, 2.5 GHz maximum frequency, 335 V voltage rating, and -55°C to 85°C operating temperature range. These parameters define the electrical performance envelope and ensure signal integrity and safety compliance.

Q: Are there any material differences between the 182118 and 182325?

A: Both parts use brass body material with nickel finish and gold-plated brass center contacts. The dielectric material differs: the 182118 uses polyoxymethylene (POM) acetal, while the 182325 uses polytetrafluoroethylene (PTFE). PTFE provides superior high-frequency performance characteristics.

Q: What is the significance of the product status difference between these parts?

A: The 182118 is classified as obsolete, indicating it is no longer in active production. The 182325 is active production status with current inventory availability. For new designs and ongoing production, the 182325 is the appropriate selection to ensure long-term supply chain reliability.

Q: Do both parts support the same cable groups?

A: The 182118 supports RG-174, 188, 188A, 316, LMR-100, and M17/119-RG174 cable groups. The 182325 supports RG-174, 188, and 316 cable groups. Both parts are compatible with the common cable types RG-174, 188, and 316.

Q: What is the mating cycle rating for these connectors?

A: The 182118 specifies 500 mating cycles. The 182325 mating cycle rating is not provided in the available technical data.

Q: Are both parts RoHS compliant?

A: The 182118 is RoHS3 compliant. RoHS compliance status for the 182325 is not specified in the available technical data. Both parts carry identical ECCN and HTSUS classifications.