Pomona Electronics 72958 SMA Connector Plug Right Angle Crimp 50 Ohm

Part Overview

The Pomona Electronics 72958 is an SMA connector plug with male pin configuration, designed for 50 ohm coaxial cable applications. This connector features right angle mounting with crimp termination for the RG-58 cable group. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring compatible RF connectivity solutions.

Substiute Parts

72958

Pomona ElectronicsIn Stock: 96472958 Datasheet

Current PartRFQ

142-0403-101

Cinch Connectivity SolutionsIn Stock: 2699142-0403-101 Datasheet

SimilarRFQ

142-0404-101

Cinch Connectivity SolutionsIn Stock: 969142-0404-101 Datasheet

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142-0408-101

Cinch Connectivity Solutions JohnsonIn Stock: 2569142-0408-101 Datasheet

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142-0439-101

Cinch Connectivity SolutionsIn Stock: 720142-0439-101 Datasheet

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142-9407-101

Cinch Connectivity SolutionsIn Stock: 992142-9407-101 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Pomona Electronics 72958 are selected based on strict electrical and mechanical compatibility criteria. All substitute connectors maintain the following core parameters:

• SMA connector style with male pin configuration
• 50 ohm impedance
• Right angle, free hanging (in-line) mounting
• Threaded fastening type
• 12.4 GHz maximum frequency
• -65°C to 165°C operating temperature range
• 500 mating cycles
• PTFE dielectric material
• Gold plating on body finish and center contact

The primary distinction among substitutes is the contact termination method. The original 72958 uses crimp termination, while all listed substitutes employ solder termination. This difference requires consideration of assembly process compatibility and cable preparation methods. Secondary variations include voltage rating differences (250 V to 335 V versus the original 500 V), body material composition (brass versus copper alloy), and supported cable groups.

Parameter Comparison

Engineering Selection Recommendations

All five substitute parts listed are active products from Cinch Connectivity Solutions or Cinch Connectivity Solutions Johnson, providing long-term availability compared to the obsolete Pomona 72958.

For applications requiring the original RG-58 cable group compatibility, part 142-9407-101 is the direct functional equivalent. This part maintains RG-58 support alongside RG-141 and RG-303 cable groups, operates at 335 V, and carries ROHS3 compliance. The non-magnetic feature and copper alloy construction differentiate this option for specialized RF applications.

For broader cable group flexibility, part 142-0408-101 supports RG-55, RG-142, RG-223, and RG-400 cables with 335 V rating and RoHS compliance. Part 142-0403-101 accommodates RG-161, RG-174, RG-188, and RG-316 cables at 250 V with ROHS3 compliance.

All substitutes employ solder termination rather than crimp termination. This requires assembly process modification and appropriate soldering equipment. The voltage rating reduction in some substitutes (250 V versus the original 500 V) must be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the Pomona 72958 with any of these Cinch substitutes?

A: Electrical and mechanical compatibility is maintained across all listed substitutes for standard 50 ohm RF applications. The primary consideration is termination method: the original uses crimp termination while all substitutes use solder termination. Assembly processes must accommodate this difference.

Q: Which substitute is best for RG-58 cable applications?

A: Part 142-9407-101 explicitly supports RG-58 cable group and maintains the same 50 ohm impedance, frequency range, and operating temperature as the original. This part also offers 335 V rating and ROHS3 compliance.

Q: What is the voltage rating difference, and does it matter?

A: The original 72958 is rated at 500 V. Substitutes range from 250 V to 335 V. Selection depends on application voltage requirements. If your system operates below 250 V, any substitute is acceptable. For higher voltage applications, choose 142-0408-101 or 142-9407-101 at 335 V.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitutes carry either RoHS or ROHS3 compliance status, meeting environmental and regulatory requirements equivalent to or exceeding the original part.

Q: What cable groups does each substitute support?

A: 142-0403-101 supports RG-161, 174, 188, 316; 142-0404-101 supports RG-188DS, 316DS; 142-0408-101 supports RG-55, 142, 223, 400; 142-0439-101 supports Belden 7807A and LMR-200; 142-9407-101 supports RG-58, 141, 303. Verify cable group compatibility with your specific application.

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

A: Crimp termination (original) uses mechanical pressure to attach the cable. Solder termination (substitutes) uses heat and solder to create the connection. Solder termination typically provides stronger mechanical bonds but requires soldering equipment and skill. Crimp termination is faster but requires proper crimping tools.

Q: Do these substitutes have the same mating cycle rating?

A: Yes. All substitutes maintain 500 mating cycles, matching the original specification for connector durability and reliability.