MCX Straight PCB Jack 252117-75 Equivalent & Substitute Parts

Part Overview

The Amphenol RF 252117-75 is an MCX connector jack designed for surface mount PCB applications with 75 ohm impedance. This female socket connector operates at frequencies up to 6 GHz and is specified for solder termination on both center contact and shield. The part is active in production status and ROHS3 compliant, making it suitable for modern electronic assemblies requiring RF signal transmission in compact form factors.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct replacement in circuit designs where impedance, frequency response, mounting type, and termination method are identical or functionally compatible.

Key Parameters

Parameter	Specification
Connector Style	MCX
Connector Type	Jack, Female Socket
Impedance	75 Ohms
Mounting Type	Surface Mount
Contact Termination	Solder
Shield Termination	Solder
Frequency Maximum	6 GHz
Operating Temperature Range	-65°C to 165°C
Mating Cycles	500
Body Material	Brass
Body Finish	Gold
Dielectric Material	Polytetrafluoroethylene (PTFE)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 252117-75 are categorized based on impedance matching and electrical parameter alignment:

Group 1: 75 Ohm Impedance Equivalents These parts maintain identical 75 ohm impedance specification, ensuring direct electrical compatibility without circuit redesign. Parts in this group: 919-132J-71P (Amphenol RF), 133-8711-201 (Cinch Connectivity Solutions).

Group 2: 50 Ohm Impedance Alternatives These parts operate at 50 ohm impedance and represent functional alternatives for applications where impedance matching to 50 ohm systems is required. Parts in this group: 1-1337582-0 (TE Connectivity), 133-3711-201 (Cinch Connectivity Solutions), 133-3711-211 (Cinch Connectivity Solutions), 29K101-40ML5 (Rosenberger), 82_MCX-S50-0-29/111_NH (Huber+Suhner), R113424000 (Radiall USA).

All substitute parts share the following critical parameters with the main part:

MCX connector style
Female socket jack configuration
Surface mount mounting type
Solder termination for both center contact and shield
6 GHz maximum frequency
500 mating cycles
Brass body with gold finish
PTFE dielectric material
ROHS3 compliance

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance (Ohms)	Frequency Max (GHz)	Operating Temperature (°C)	Mating Cycles	RoHS Status	Inventory (Pcs)
252117-75	Amphenol RF	75	6	-65 to 165	500	ROHS3	732
919-132J-71P	Amphenol RF	75	6	-65 to 165	500	ROHS3	1156
133-8711-201	Cinch Connectivity Solutions	75	6	-65 to 165	500	ROHS3	983
1-1337582-0	TE Connectivity AMP Connectors	50	6	-65 to 165	500	ROHS3	2327
133-3711-201	Cinch Connectivity Solutions Johnson	50	6	-65 to 165	500	ROHS3	8126
133-3711-211	Cinch Connectivity Solutions	50	6	-65 to 165	500	ROHS3	1133
29K101-40ML5	Rosenberger	50	6	-55 to 155	500	ROHS3	1051
82_MCX-S50-0-29/111_NH	Huber+Suhner, Inc.	50	6	-55 to 155	500	ROHS3	4569
R113424000	Radiall USA, Inc.	50	6	-55 to 155	500	ROHS3	1900

Engineering Selection Recommendations

Direct Replacement (75 Ohm Impedance)

Parts 919-132J-71P and 133-8711-201 are direct electrical equivalents to the 252117-75. Both maintain 75 ohm impedance, identical frequency response to 6 GHz, and matching operating temperature range of -65°C to 165°C. All three parts are ROHS3 compliant and active in production status. Selection between these parts depends on manufacturer preference, supply chain considerations, and inventory availability.

Functional Alternatives (50 Ohm Impedance)

Parts 1-1337582-0, 133-3711-201, 133-3711-211, 29K101-40ML5, 82_MCX-S50-0-29/111_NH, and R113424000 operate at 50 ohm impedance. These parts are suitable for applications designed around 50 ohm system impedance. All maintain 6 GHz frequency capability and 500 mating cycle rating. Operating temperature ranges vary slightly: parts from TE Connectivity, Cinch, and Radiall support -65°C to 165°C or -55°C to 155°C. All substitute parts are ROHS3 compliant and active in production.

Compliance and Certification

All listed substitute parts carry ROHS3 compliance matching the main part. REACH status varies: most parts are REACH Affected, while 82_MCX-S50-0-29/111_NH is REACH Unaffected. All parts are classified under ECCN EAR99 and HTSUS 8536.69.4010.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 ohm MCX connector in place of the 75 ohm 252117-75?

A: Substitution is possible from an electrical compatibility standpoint if your circuit design operates at 50 ohm impedance. However, impedance mismatch between connector and transmission line creates signal reflections. Use 50 ohm substitutes only when your system is designed for 50 ohm operation. For 75 ohm systems, use 919-132J-71P or 133-8711-201.

Q: What is the difference between the two 75 ohm alternatives?

A: Both 919-132J-71P (Amphenol RF) and 133-8711-201 (Cinch Connectivity Solutions) meet all electrical and mechanical specifications of the 252117-75. Differences are limited to manufacturer, part numbering, and inventory levels. Selection is based on supply availability and procurement preferences.

Q: Are there temperature range limitations I should consider?

A: The main part 252117-75 operates from -65°C to 165°C. Most 50 ohm substitutes maintain this range. However, 29K101-40ML5, 82_MCX-S50-0-29/111_NH, and R113424000 operate from -55°C to 155°C. If your application requires operation below -55°C or above 155°C, verify compatibility before substitution.

Q: What does MSL (Moisture Sensitivity Level) mean for these connectors?

A: The 252117-75 lists MSL as Not Applicable. All substitute parts specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. This represents an improvement in handling flexibility compared to moisture-sensitive components.

Q: Can I substitute based on insertion loss specifications?

A: The main part 252117-75 does not specify insertion loss. Among substitutes, only 919-132J-71P provides insertion loss data (0.1 dB). Insertion loss is not a differentiating parameter for this substitution analysis. Selection should prioritize impedance matching and mechanical compatibility.

Q: What about the voltage rating differences shown in the parameter table?

A: Voltage ratings vary among substitutes (170 V to 335 V). The main part does not specify voltage rating. For PCB-mounted RF connectors in typical signal applications, voltage rating is not a primary selection criterion. Verify voltage requirements for your specific application before substitution.

Q: Does the inclusion of a cap with part 29K101-40ML5 affect substitution?

A: Part 29K101-40ML5 includes 2 pieces (1 connector, 1 cap) versus the standard connector-only configuration. The cap is a protective accessory and does not affect electrical or mechanical compatibility. Account for this in inventory management and assembly procedures.

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