Amphenol RF 252101 MCX Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 252101 is an MCX connector plug with male pin configuration, 50 ohm impedance, and crimp termination for the center contact. This component is classified as "Not For New Designs" and operates at frequencies up to 6 GHz with a maximum voltage rating of 225 V. The connector accommodates cable groups RG-174, 188, 188A, 316, LMR-100, and M17/119-RG174 with free hanging (in-line) mounting and snap-on fastening.

Due to the "Not For New Designs" status of the 252101, equivalent substitute parts with active product status are available. These alternatives maintain core electrical and mechanical compatibility while offering improved availability and ongoing manufacturer support.

Substiute Parts

252101

Amphenol RFIn Stock: 1089252101 Datasheet

Current PartRFQ

919-101P-51S1X

Amphenol RFIn Stock: 902919-101P-51S1X Datasheet

DirectRFQ

919-386P-51S

Amphenol RFIn Stock: 1984919-386P-51S Datasheet

Parametric EquivalentRFQ

133-3403-006

Cinch Connectivity SolutionsIn Stock: 1168133-3403-006 Datasheet

DirectRFQ

133-9402-101

Cinch Connectivity SolutionsIn Stock: 3608133-9402-101 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 252101 are classified based on the following substitution criteria:

Direct Parametric Equivalents maintain identical electrical and mechanical specifications across core parameters: MCX connector style, male pin plug type, 50 ohm impedance, free hanging in-line mounting, snap-on fastening, 6 GHz maximum frequency, 500 mating cycles, and PTFE dielectric material. These parts differ in contact termination method (crimp versus solder), body material composition, or operating temperature range while preserving functional compatibility.

Direct Manufacturer Equivalents are offered by alternative manufacturers (Cinch Connectivity Solutions) and provide the same connector style, impedance, mounting configuration, and frequency rating. These parts maintain compatibility with the same cable groups or overlapping cable group specifications.

Similar Parts share the MCX connector style, male pin configuration, 50 ohm impedance, and snap-on fastening but incorporate design variations such as right-angle mounting orientation or different contact termination methods. These parts are suitable for applications where the mounting geometry differs from the original straight (in-line) configuration.

The following parameters determine substitution eligibility:

• Connector Style: MCX (mandatory)
• Connector Type: Plug, Male Pin (mandatory)
• Impedance: 50 Ohms (mandatory)
• Fastening Type: Snap-On (mandatory)
• Frequency - Max: 6 GHz (mandatory)
• Dielectric Material: PTFE (mandatory for direct equivalents)
• Contact Termination: Crimp or Solder (interchangeable based on application requirements)
• Mounting Type: Free Hanging (In-Line) or Right Angle (application-dependent)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Straight In-Line Configuration):

The Amphenol RF 919-386P-51S is the primary parametric equivalent for the 252101. Both parts feature crimp contact termination, identical MCX connector geometry, 50 ohm impedance, and 6 GHz frequency rating. The 919-386P-51S carries active product status and maintains ROHS3 compliance and REACH affected designation. The body material differs (brass versus beryllium copper), and the operating temperature range is narrower (-40°C to 85°C versus unspecified for the 252101). This part is suitable for applications within the specified temperature range.

The Amphenol RF 919-101P-51S1X provides an alternative with solder contact termination instead of crimp. This part offers an extended operating temperature range (-65°C to 165°C) and higher voltage rating (335 V versus 225 V), making it suitable for demanding thermal and electrical environments. Active product status and full compliance certifications apply.

The Cinch Connectivity Solutions 133-3403-006 offers crimp or solder contact termination flexibility with active product status. This part supports an extended operating temperature range (-65°C to 165°C) and higher voltage rating (335 V). Cable group compatibility includes RG-161, 174, 188, and 316. ROHS3 compliance and REACH affected status are maintained.

For Right-Angle Configuration:

The Cinch Connectivity Solutions 133-9402-101 is classified as a similar part due to its right-angle mounting orientation. This configuration is not interchangeable with the straight in-line 252101 but serves applications requiring perpendicular cable routing. The part features solder contact termination, extended operating temperature range (-65°C to 165°C), and active product status. Insertion loss is specified at 0.2 dB. This part is suitable only for applications where right-angle geometry is required.

Compliance and Availability Considerations:

All substitute parts maintain ROHS3 compliance and REACH affected status, ensuring regulatory alignment with the original 252101. All substitute parts carry active product status, providing ongoing manufacturer support and availability. The 252101's "Not For New Designs" classification indicates that new designs should incorporate one of the active substitute parts listed above.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol RF 919-386P-51S directly replace the 252101 in existing assemblies?

A: The 919-386P-51S is a parametric equivalent with identical MCX connector style, male pin configuration, 50 ohm impedance, crimp termination, and 6 GHz frequency rating. Both parts accommodate the same cable groups (RG-174, 188, 188A, 316, LMR-100, M17/119-RG174) and feature snap-on fastening. The primary difference is body material composition (brass versus beryllium copper) and operating temperature range. Direct replacement is supported for applications operating within -40°C to 85°C.

Q: What is the difference between crimp and solder contact termination options?

A: Contact termination method determines how the connector attaches to the cable conductor. Crimp termination uses mechanical compression to secure the contact to the cable, while solder termination uses molten solder to create the connection. The 252101 and 919-386P-51S use crimp termination. The 919-101P-51S1X and 133-9402-101 use solder termination. The 133-3403-006 supports both methods. Selection depends on assembly process capability and application requirements.

Q: Are the Cinch Connectivity Solutions parts compatible with the same cable groups as the Amphenol RF 252101?

A: The Cinch 133-3403-006 supports cable groups RG-161, 174, 188, and 316, which overlap with the 252101's supported groups (RG-174, 188, 188A, 316, LMR-100, M17/119-RG174). The Cinch 133-9402-101 supports RG-178 and 196, which differ from the 252101. Cable group compatibility must be verified for specific applications.

Q: Why does the 133-9402-101 have higher insertion loss (0.2 dB) compared to other parts (0.1 dB)?

A: The 133-9402-101 features right-angle mounting geometry, which introduces additional signal path complexity compared to straight in-line configurations. The increased insertion loss is a characteristic of the right-angle design. This part is suitable only for applications where right-angle cable routing is required.

Q: What is the significance of the operating temperature range differences among substitute parts?

A: The 252101 does not specify an operating temperature range. The 919-386P-51S operates from -40°C to 85°C, while the 919-101P-51S1X, 133-3403-006, and 133-9402-101 operate from -65°C to 165°C. Applications requiring operation outside the -40°C to 85°C range must use parts with extended temperature specifications. Temperature range affects material properties and long-term reliability.

Q: Are all substitute parts RoHS3 compliant and REACH affected?

A: All substitute parts listed (919-101P-51S1X, 919-386P-51S, 133-3403-006, and 133-9402-101) are ROHS3 compliant and REACH affected, matching the compliance status of the original 252101. This ensures regulatory alignment for new designs and existing applications.

Q: What does "Not For New Designs" status mean for the 252101?

A: "Not For New Designs" indicates that the manufacturer no longer recommends this part for new product development. Existing designs may continue using the 252101 if inventory is available, but new designs should incorporate one of the active substitute parts. All listed substitute parts carry active product status.

Q: Can the 919-101P-51S1X be used in place of the 252101 if solder termination is acceptable?

A: The 919-101P-51S1X is a direct manufacturer equivalent with identical MCX connector style, male pin configuration, 50 ohm impedance, and 6 GHz frequency rating. The primary difference is contact termination method (solder versus crimp). If the application assembly process supports solder termination and the extended operating temperature range (-65°C to 165°C) and higher voltage rating (335 V) are compatible, the 919-101P-51S1X is a suitable substitute.

Q: What packaging differences exist among the substitute parts?

A: The 252101 is supplied in bag packaging, while all substitute parts (919-101P-51S1X, 919-386P-51S, 133-3403-006, and 133-9402-101) are supplied in bulk packaging. Packaging format may affect inventory management and component handling but does not affect electrical or mechanical performance.