Amphenol RF 252126 MCX Connector Plug - Equivalent & Substitute Parts

Part Overview

The Amphenol RF 252126 is an MCX connector plug designed for RF coaxial applications requiring 50 Ohm impedance. This male pin connector features solder contact termination and crimp shield termination, suitable for free hanging in-line mounting configurations. The part is Active status and widely used in RF signal transmission applications up to 6 GHz. Substitute parts are identified when equivalent electrical and mechanical parameters are required for component procurement, inventory management, or design flexibility while maintaining system performance specifications.

Substiute Parts

252126

Amphenol RFIn Stock: 920252126 Datasheet

Current PartRFQ

919-388P-51S

Amphenol RFIn Stock: 1293919-388P-51S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Amphenol RF 252126 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Connector Style: MCX (identical RF interface geometry)
• Connector Type: Plug, Male Pin (identical mating configuration)
• Impedance: 50 Ohms (identical electrical characteristic)
• Contact Termination: Solder (identical connection method)
• Shield Termination: Crimp (identical shielding method)
• Frequency - Max: 6 GHz (identical operational bandwidth)

Mechanical Equivalence Requirements:

• Mounting Type: Free Hanging (In-Line) (identical physical installation)
• Fastening Type: Snap-On (identical coupling mechanism)
• Cable Group: RG-178, 178A, 178B, 196, 196A, M17/93-RG178 (identical cable compatibility)

Material and Performance Requirements:

• Center Contact Material: Brass (identical conductive material)
• Center Contact Plating: Gold (identical contact surface)
• Dielectric Material: PTFE (identical insulation material)
• Voltage Rating: 225 V (identical electrical stress rating)
• Mating Cycles: 500 (identical mechanical durability specification)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant (identical regulatory compliance)
• REACH Status: REACH Affected (identical chemical substance regulation)

The substitute part 919-388P-51S meets all critical electrical, mechanical, and compliance parameters, establishing full parametric equivalence for direct substitution in applications requiring the 252126.

Parameter Comparison

Engineering Selection Recommendations

Both the Amphenol RF 252126 and 919-388P-51S are Active status products manufactured by Amphenol RF and maintain full compliance with ROHS3 and REACH regulations. Both parts satisfy identical electrical and mechanical specifications for MCX 50 Ohm RF connector applications.

Selection Basis:

The 252126 and 919-388P-51S are parametrically equivalent for RF signal transmission applications requiring MCX plug connectors with solder termination, snap-on fastening, and operation up to 6 GHz. Both parts support identical cable groups (RG-178 series and M17/93-RG178) and maintain equivalent electrical performance characteristics.

Noted Differences:

Body material differs between parts (Beryllium Copper in 252126 versus Brass in 919-388P-51S). The 919-388P-51S includes an additional spacer component in its package and specifies operating temperature range (-55°C ~ 155°C), while the 252126 does not provide operating temperature specification. The 252126 specifies insertion loss at 0.1 dB; the 919-388P-51S does not provide this parameter.

Compliance Status:

Both parts maintain Active product status and full regulatory compliance. Selection between these parts is determined by specific application requirements regarding body material composition, package contents, and documented operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 919-388P-51S directly replace the 252126 in existing designs?

A: Yes. Both parts are parametrically equivalent across all critical electrical and mechanical specifications: MCX connector style, 50 Ohm impedance, solder contact termination, crimp shield termination, free hanging in-line mounting, snap-on fastening, 6 GHz maximum frequency, and identical cable group compatibility (RG-178, 178A, 178B, 196, 196A, M17/93-RG178). Both maintain ROHS3 and REACH compliance.

Q: What is the difference in body material between these parts?

A: The 252126 uses Beryllium Copper body material, while the 919-388P-51S uses Brass body material. Both materials provide adequate electrical conductivity and mechanical durability for MCX connector applications. Material selection depends on specific application requirements for thermal conductivity, mechanical strength, or material restrictions.

Q: Why does the 919-388P-51S include a spacer component?

A: The 919-388P-51S package includes four components (connector, contact, ferrule, and spacer), while the 252126 includes three components (connector, contact, and ferrule). The spacer component in the 919-388P-51S may provide additional assembly flexibility or mechanical support depending on application configuration. Verify spacer necessity for your specific installation method.

Q: Are both parts suitable for the same frequency range?

A: Yes. Both the 252126 and 919-388P-51S specify 6 GHz maximum frequency, establishing identical RF performance capability for signal transmission applications within this bandwidth.

Q: What is the significance of the operating temperature specification in the 919-388P-51S?

A: The 919-388P-51S specifies operating temperature range of -55°C to 155°C. The 252126 does not provide an operating temperature specification in the available data. For applications requiring documented temperature performance limits, the 919-388P-51S provides explicit thermal operating range. Verify temperature requirements for your specific application environment.

Q: Do both parts support the same cable types?

A: Yes. Both parts support identical cable groups: RG-178, 178A, 178B, 196, 196A, and M17/93-RG178. Cable compatibility is fully equivalent between the two parts.

Q: What is the insertion loss specification for these connectors?

A: The 252126 specifies insertion loss at 0.1 dB. The 919-388P-51S does not provide insertion loss specification in the available data. For applications requiring documented insertion loss performance, the 252126 provides explicit specification. Contact the manufacturer for insertion loss data on the 919-388P-51S if this parameter is critical for your application.

Q: Are both parts available in equivalent quantities?

A: Current inventory levels differ. The 252126 has 907 pieces in stock, while the 919-388P-51S has 1220 pieces in stock. Packaging differs: the 252126 packaging is not specified, while the 919-388P-51S is supplied in Bulk packaging. Verify packaging and quantity requirements for your procurement needs.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 252126 and 919-388P-51S are ROHS3 Compliant and REACH Affected, establishing equivalent regulatory compliance for applications requiring these certifications.