Amphenol RF 252127 MCX Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 252127 is an MCX connector plug designed for RF coaxial applications requiring 50-ohm impedance. This male pin connector features solder termination for the center contact and crimp termination for the shield, operating across a frequency range up to 6 GHz. The connector is rated for free-hanging (in-line) mounting with snap-on fastening and supports cable groups RG-178, 178A, 178B, 196, and 196A per MIL-SPEC M17/93-RG178.

The part maintains active product status with full RoHS3 compliance and REACH compliance. Substitute parts are identified to address application requirements where alternative termination methods, mounting orientations, or enhanced operating temperature ranges are necessary.

Substiute Parts

252127

Amphenol RFIn Stock: 948252127 Datasheet

Current PartRFQ

133-3402-001

Cinch Connectivity Solutions JohnsonIn Stock: 1232133-3402-001 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 252127 are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Connector Style: MCX (maintained across all substitutes)
• Connector Type: Plug, Male Pin (maintained across all substitutes)
• Impedance: 50 Ohms (maintained across all substitutes)
• Fastening Type: Snap-On (maintained across all substitutes)
• Frequency - Max: 6 GHz (maintained across all substitutes)
• Shield Termination: Crimp (maintained across all substitutes)

Substitution Allowances:

• Contact Termination: Solder or Crimp or Solder (flexibility in center contact connection method)
• Mounting Type: Free Hanging (In-Line) or Free Hanging (In-Line) with Right Angle orientation
• Operating Temperature Range: Extended ranges acceptable for enhanced thermal performance
• Voltage Rating: Higher ratings acceptable for increased safety margin
• Insertion Loss: Variations within RF performance specifications

The substitute parts Cinch Connectivity Solutions Johnson 133-3402-001 and Cinch Connectivity Solutions 133-9402-101 maintain all primary compatibility criteria while offering alternative termination and mounting configurations.

Parameter Comparison

Engineering Selection Recommendations

Amphenol RF 252127 (Primary Part)

Select this part for applications requiring straight in-line MCX connector configuration with solder termination. The operating temperature range of -55°C to 155°C is suitable for standard industrial and commercial RF applications. The part maintains active product status with full RoHS3 and REACH compliance, ensuring regulatory compliance for current and future procurement requirements.

Cinch Connectivity Solutions Johnson 133-3402-001 (Direct Substitute)

This part provides equivalent functionality with the added flexibility of crimp or solder termination for the center contact. The extended operating temperature range (-65°C to 165°C) and higher voltage rating (250 V) offer enhanced performance margins. The straight in-line mounting configuration matches the primary part. RoHS3 and REACH compliance are maintained. Select this part when crimp termination capability is required or when extended thermal operating range is necessary.

Cinch Connectivity Solutions 133-9402-101 (Alternative Configuration)

This part maintains MCX plug configuration with solder termination but provides right-angle mounting orientation. The extended operating temperature range (-65°C to 165°C) and higher voltage rating (250 V) are equivalent to the 133-3402-001. Insertion loss is 0.2 dB compared to 0.1 dB for the primary part. The non-magnetic feature is included. RoHS3 and REACH compliance are maintained. Select this part when right-angle connector orientation is required for space-constrained or specific cable routing applications.

All three parts maintain identical impedance (50 Ohms), frequency capability (6 GHz), snap-on fastening, and mating cycle ratings (500 cycles). Selection between parts depends on specific mounting geometry requirements and termination method preferences.

Frequently Asked Questions (FAQ)

Q: Can the Cinch 133-3402-001 be used as a direct replacement for the Amphenol RF 252127?

A: Yes. Both parts maintain identical MCX plug configuration, 50-ohm impedance, 6 GHz frequency capability, and snap-on fastening. The 133-3402-001 offers flexible center contact termination (crimp or solder), extended operating temperature range, and higher voltage rating. The straight in-line mounting configuration is identical.

Q: What is the primary difference between the Cinch 133-3402-001 and 133-9402-101?

A: The 133-3402-001 provides straight in-line mounting, while the 133-9402-101 provides right-angle mounting. Both maintain 50-ohm impedance and 6 GHz frequency capability. The 133-9402-101 has insertion loss of 0.2 dB compared to 0.1 dB for the 133-3402-001 and includes a non-magnetic feature.

Q: Are all three parts RoHS3 compliant?

A: Yes. The Amphenol RF 252127, Cinch 133-3402-001, and Cinch 133-9402-101 are all RoHS3 compliant and REACH affected. All parts maintain MSL rating of 1 (Unlimited).

Q: What cable groups are supported by each part?

A: The Amphenol RF 252127 supports RG-178, 178A, 178B, 196, 196A, and M17/93-RG178. The Cinch 133-3402-001 supports RG-178 and 196. The Cinch 133-9402-101 supports RG-178 and 196. Verify cable compatibility for your specific application.

Q: Can the Cinch 133-9402-101 be used in applications requiring straight in-line orientation?

A: No. The 133-9402-101 is configured for right-angle mounting only. For straight in-line applications, use the Amphenol RF 252127 or Cinch 133-3402-001.

Q: What is the difference in operating temperature ranges?

A: The Amphenol RF 252127 operates from -55°C to 155°C. Both Cinch parts (133-3402-001 and 133-9402-101) operate from -65°C to 165°C, providing extended thermal capability at both low and high temperature extremes.

Q: Are there differences in packaging between these parts?

A: Yes. The Amphenol RF 252127 is supplied in bag packaging. Both Cinch parts (133-3402-001 and 133-9402-101) are supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.

Q: What materials are used in the body construction?

A: The Amphenol RF 252127 uses beryllium copper body material. The Cinch 133-3402-001 uses brass body material. The Cinch 133-9402-101 uses copper alloy body material. All three parts use gold finish and gold-plated center contacts with PTFE dielectric material.

Q: Do all parts support the same number of mating cycles?

A: Yes. All three parts are rated for 500 mating cycles, providing equivalent mechanical durability for connector engagement and disengagement operations.

Q: What is the significance of the insertion loss difference between parts?

A: The Amphenol RF 252127 and Cinch 133-3402-001 both specify 0.1 dB insertion loss. The Cinch 133-9402-101 specifies 0.2 dB insertion loss due to the right-angle configuration. For applications with strict insertion loss requirements, the straight in-line parts are preferred.