Amphenol RF 252139 MCX Connector Jack Equivalent & Substitute Parts

Part Overview

The Amphenol RF 252139 is an MCX connector jack (female socket) rated for 50 ohms impedance with solder termination. This component is designed for free-hanging (in-line) applications and operates at frequencies up to 6 GHz. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for applications requiring continued supply, legacy system maintenance, or design flexibility where alternative packaging or termination methods are acceptable.

Substiute Parts

252139

Amphenol RFIn Stock: 1014252139 Datasheet

Current PartRFQ

919-107J-51SX

Amphenol RFIn Stock: 1065919-107J-51SX Datasheet

DirectRFQ

133-3303-001

Cinch Connectivity SolutionsIn Stock: 1249133-3303-001 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Amphenol RF 252139 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Connector Style: MCX
• Connector Type: Jack, Female Socket
• Impedance: 50 Ohms
• Mounting Type: Free Hanging (In-Line)
• Frequency - Max: 6 GHz
• Fastening Type: Snap-On
• Number of Ports: 1

Secondary Compatibility Parameters:

• Center Contact Material: Beryllium Copper
• Body Material: Brass
• Body Finish: Gold
• Center Contact Plating: Gold
• Dielectric Material: PTFE
• Mating Cycles: 500
• Insertion Loss: 0.1 dB
• RoHS Status: ROHS3 Compliant
• MSL: 1 (Unlimited)

Termination Flexibility: The primary part specifies solder contact termination. Substitute parts may offer crimp or solder termination options, provided all other electrical and mechanical parameters remain equivalent. Cable group compatibility must be verified for the specific application.

Parameter Comparison

Engineering Selection Recommendations

Amphenol RF 919-107J-51SX

This part is the direct Amphenol RF equivalent to the 252139. It maintains identical electrical and mechanical specifications, including solder contact termination, 50 ohm impedance, and 6 GHz frequency rating. The primary distinction is product status: 919-107J-51SX is classified as Active, whereas 252139 is Not For New Designs. Both parts are ROHS3 compliant and carry identical compliance certifications. The 919-107J-51SX is suitable for new designs and ongoing production applications.

Cinch Connectivity Solutions 133-3303-001

This part provides cross-manufacturer substitution with equivalent electrical performance. It meets all primary substitution criteria: MCX jack female socket, 50 ohm impedance, 6 GHz frequency rating, and snap-on fastening. The contact termination is specified as "Crimp or Solder," providing termination flexibility. The 133-3303-001 is Active status and ROHS3 compliant. Cable group compatibility differs slightly (RG-161, 174, 179, 187, 188, 316 versus RG-174, 188, 188A, 316, LMR-100, M17/119-RG174); verify cable compatibility for the specific application. Voltage rating is 335 V compared to 252139's 225 V, providing higher electrical margin.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol RF 919-107J-51SX directly replace the 252139 in existing designs?

A: Yes. The 919-107J-51SX is electrically and mechanically equivalent to the 252139. Both parts share identical impedance (50 ohms), frequency rating (6 GHz), contact material (beryllium copper), termination method (solder), and all other critical parameters. The primary difference is product status: 919-107J-51SX is Active, while 252139 is Not For New Designs.

Q: What is the difference between the Amphenol RF 919-107J-51SX and the Cinch Connectivity 133-3303-001?

A: Both parts are MCX jack female sockets with 50 ohm impedance and 6 GHz frequency rating. The key differences are: (1) Manufacturer: Amphenol RF versus Cinch Connectivity Solutions; (2) Contact termination: 919-107J-51SX is solder only, while 133-3303-001 offers crimp or solder; (3) Cable group compatibility: the supported cable types differ slightly; (4) Voltage rating: 133-3303-001 is rated 335 V versus 225 V for 252139. Both are ROHS3 compliant and Active status.

Q: Does packaging affect electrical performance or compatibility?

A: No. The 252139 is supplied in Bag packaging, while both substitute parts are supplied in Bulk packaging. Packaging affects only handling, storage, and ordering logistics. Electrical and mechanical performance are identical regardless of packaging format.

Q: Can I use the Cinch Connectivity 133-3303-001 with the same cables as the 252139?

A: The 252139 supports RG-174, 188, 188A, 316, LMR-100, and M17/119-RG174 cables. The 133-3303-001 supports RG-161, 174, 179, 187, 188, and 316 cables. There is overlap (RG-174, 188, 316), but the cable groups are not identical. Verify that your specific cable type is supported by the substitute part before implementation.

Q: Are both substitute parts compliant with current regulatory standards?

A: Yes. Both the Amphenol RF 919-107J-51SX and Cinch Connectivity 133-3303-001 are ROHS3 compliant, REACH affected, and carry EAR99 ECCN classification. Both have MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Q: What is the mating cycle rating, and does it differ between parts?

A: All three parts (252139, 919-107J-51SX, and 133-3303-001) are rated for 500 mating cycles. This specification is identical across all options and indicates the expected number of connect/disconnect operations before performance degradation.

Q: Is the insertion loss specification the same across all three parts?

A: Yes. All three parts specify 0.1 dB insertion loss at the rated frequency. This parameter is identical and indicates equivalent RF performance across the MCX jack female socket options.