Amphenol RF 31-216-RFX Coaxial Connector Adapter: Equivalent & Substitute Parts

Part Overview

The Amphenol RF 31-216-RFX is an adapter coaxial connector that converts N Plug (male pin) to BNC Jack (female socket) configurations. This straight-style, free-hanging adapter operates at 50 Ohms impedance with a maximum frequency rating of 4 GHz. The part is currently active in production with 798 pieces in stock. Alternative equivalent parts are necessary for supply chain continuity, design flexibility, and procurement optimization when the primary part number becomes unavailable or when inventory constraints require substitution.

Substiute Parts

31-216-RFX

Amphenol RFIn Stock: 85831-216-RFX Datasheet

Current PartRFQ

31-216

Amphenol RFIn Stock: 144931-216 Datasheet

DirectRFQ

3288

Pomona ElectronicsIn Stock: 8293288 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Amphenol RF 31-216-RFX is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Adapter Type: Plug to Jack
• Conversion Type: Between Series (BNC to N)
• Center Gender Configuration: Female to Male
• Convert From End: N Plug, Male Pin
• Convert To End: BNC Jack, Female Socket
• Impedance: 50 Ohms
• Style: Straight
• Mounting Type: Free Hanging (In-Line)
• Fastening Type: Bayonet Lock, Threaded
• Operating Temperature Range: -65°C to 165°C
• Body Material: Brass
• Body Finish: Nickel
• Center Contact Material: Beryllium Copper
• Dielectric Material: Polytetrafluoroethylene (PTFE)

All identified substitute parts meet these criteria. Variations in secondary parameters such as center contact plating material and mating cycle specifications do not affect functional interchangeability within the defined electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Amphenol RF 31-216 (Direct Equivalent): The part number 31-216 is the base model designation for the 31-216-RFX. This part maintains identical electrical and mechanical specifications with higher current inventory availability (1341 pieces). Both parts are manufactured by Amphenol RF, carry active product status, and hold ROHS3 compliance. Selection of 31-216 provides equivalent performance with improved supply chain availability.

Pomona Electronics 3288 (Cross-Manufacturer Substitute): The Pomona Electronics 3288 meets all critical functional parameters for N Plug to BNC Jack adapter conversion at 50 Ohms impedance. This part is manufactured by an alternative supplier, maintains active product status, and holds ROHS3 compliance. The primary difference is center contact plating material (gold versus silver). Both plating materials provide equivalent electrical conductivity and corrosion resistance within the specified operating temperature range of -65°C to 165°C. Mating cycle specification is not provided for the 3288; however, the 500-cycle rating of the primary part establishes the baseline requirement. The 3288 is suitable for applications where cross-manufacturer sourcing is acceptable and inventory constraints on Amphenol RF parts necessitate alternative procurement.

Frequently Asked Questions (FAQ)

Q: Can the Pomona Electronics 3288 be used as a direct replacement for the Amphenol RF 31-216-RFX?

A: Yes. The 3288 meets all specified electrical and mechanical parameters for N Plug to BNC Jack adapter conversion. Both parts operate at 50 Ohms impedance, support the same frequency range, and function across the identical operating temperature range of -65°C to 165°C. The difference in center contact plating material (gold versus silver) does not affect functional compatibility within these parameters.

Q: What is the difference between part numbers 31-216-RFX and 31-216?

A: The 31-216 is the base part number; 31-216-RFX is a variant designation. Both parts are manufactured by Amphenol RF and share identical electrical and mechanical specifications. The 31-216 carries higher inventory availability (1341 pieces versus 798 pieces).

Q: Are all three parts ROHS3 compliant?

A: Yes. The Amphenol RF 31-216-RFX, Amphenol RF 31-216, and Pomona Electronics 3288 are all ROHS3 compliant.

Q: What is the maximum frequency rating for these adapters?

A: The Amphenol RF parts (31-216-RFX and 31-216) are rated to 4 GHz maximum frequency. The Pomona Electronics 3288 does not specify a maximum frequency parameter in the provided data.

Q: Do these adapters support the same mating cycle count?

A: The Amphenol RF parts specify 500 mating cycles. The Pomona Electronics 3288 does not provide a mating cycle specification in the available data.

Q: What is the moisture sensitivity level (MSL) for the Pomona Electronics 3288?

A: The Pomona Electronics 3288 is listed as Not Applicable for MSL. The Amphenol RF parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Can these adapters be used in high-temperature applications?

A: Yes. All three parts are rated for operating temperatures from -65°C to 165°C, supporting both cryogenic and elevated-temperature environments within this range.