Amphenol RF 031-359 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-359 is a BNC connector plug with male pin configuration, rated for 50 ohms impedance, and designed for free-hanging (in-line) applications. This component features solder contact termination and crimp shield termination, operating across a frequency range up to 4 GHz with a voltage rating of 500 V. The part is currently in active product status with 1164 units in stock.

Substitute parts become necessary when the original component reaches end-of-life status, when inventory constraints occur, or when alternative termination methods better suit specific application requirements. The 031-359 uses solder contact termination, while certain substitutes employ crimp termination, which may offer advantages in automated assembly environments or applications requiring different installation methodologies.

Substiute Parts

031-359

Amphenol RFIn Stock: 1221031-359 Datasheet

Current PartRFQ

1-5221128-1

TE Connectivity AMP ConnectorsIn Stock: 9481-5221128-1 Datasheet

SimilarRFQ

1-5227079-1

TE Connectivity AMP ConnectorsIn Stock: 9081-5227079-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Amphenol RF 031-359 is determined by the following core parameters that must remain constant across all equivalent parts:

Critical Matching Parameters:

• Connector Style: BNC
• Connector Type: Plug, Male Pin
• Impedance: 50 Ohms
• Mounting Type: Free Hanging (In-Line)
• Fastening Type: Bayonet Lock
• Frequency - Max: 4 GHz
• Voltage Rating: 500 V
• Mating Cycles: 500
• Insertion Loss: 0.2 dB
• Number of Ports: 1

Variable Parameters Allowing Substitution:

• Contact Termination: Solder (main part) vs. Crimp (substitute parts)
• Cable Group compatibility ranges
• Dielectric Material composition
• Center Contact Plating material
• Operating Temperature range (within acceptable limits for application)
• Product Status (Active vs. Obsolete)

The substitute parts listed below maintain all critical matching parameters while offering alternative contact termination methods and material specifications suitable for equivalent RF performance in 50-ohm coaxial applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TE Connectivity 1-5227079-1

The TE Connectivity 1-5227079-1 is the recommended substitute for the Amphenol RF 031-359. This part maintains active product status, ensuring long-term availability and supply chain stability. It satisfies all critical electrical and mechanical parameters including 50-ohm impedance, 4 GHz maximum frequency, 500 V voltage rating, and 0.2 dB insertion loss. The primary distinction is the crimp contact termination method, which provides equivalent RF performance while offering alternative assembly methodology. This part is RoHS compliant and carries the same ECCN and HTSUS classification as the original component.

Secondary Substitute: TE Connectivity 1-5221128-1

The TE Connectivity 1-5221128-1 provides functional equivalence across all critical RF parameters but carries obsolete product status. This designation indicates the part is no longer in active production, making it unsuitable for new designs or long-term production commitments. However, it remains available in current inventory (922 units) and may serve applications requiring immediate component availability where supply chain continuity is not a primary concern. The operating temperature range (-55°C ~ 85°C) is narrower than the original part, which may restrict use in extreme temperature environments.

Compliance Considerations:

All listed parts maintain EAR99 export classification and HTSUS code 8536.69.4010 consistency. The Amphenol RF 031-359 achieves ROHS3 compliance, while both TE Connectivity substitutes meet RoHS compliance standards. All parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1-5227079-1 directly replace the Amphenol RF 031-359 in existing designs?

A: Yes. Both parts maintain identical electrical specifications (50 ohms, 4 GHz, 500 V, 0.2 dB insertion loss) and mechanical form factors (BNC plug, male pin, bayonet lock, free-hanging). The primary difference is contact termination method: solder versus crimp. Applications using solder termination require no modification, while those using crimp termination benefit from the substitute's native crimp contact design.

Q: What is the significance of the operating temperature range difference?

A: The Amphenol RF 031-359 operates from -65°C to 165°C, while TE Connectivity substitutes operate from -55°C to 85°C. Applications requiring operation below -55°C or above 85°C must use the original Amphenol part. Applications within the -55°C to 85°C range can use either part without thermal performance degradation.

Q: Why is the TE Connectivity 1-5221128-1 marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. While current inventory exists (922 units), future availability is not guaranteed. New designs should specify the active TE Connectivity 1-5227079-1 to ensure supply chain continuity.

Q: Are there cable group compatibility differences between the main part and substitutes?

A: The Amphenol RF 031-359 supports cable groups RG-59, 59B, 62, 140, 210, Belden 8241, 8263, 8279, 9209. TE Connectivity substitutes support RG-59, 59A, 59B, 62, 62A, 62B. Applications using RG-140, RG-210, or Belden cables require the original Amphenol part. Standard RG-59 and RG-62 cables are compatible with all listed parts.

Q: What does the crimp termination method offer compared to solder termination?

A: Crimp termination provides mechanical connection without heat application, suitable for automated assembly processes and heat-sensitive cable jackets. Solder termination offers traditional connection methodology with established field repair procedures. Both methods achieve equivalent RF performance in this connector class.

Q: Are all parts RoHS compliant?

A: The Amphenol RF 031-359 is ROHS3 compliant. TE Connectivity substitutes are RoHS compliant. Both compliance levels meet current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the significance of the center contact plating difference?

A: The Amphenol RF 031-359 features gold plating on the center contact. TE Connectivity 1-5227079-1 features silver plating. Both materials provide equivalent electrical conductivity and corrosion resistance for RF applications. The TE Connectivity 1-5221128-1 also uses gold plating. Material selection does not affect RF performance or impedance characteristics.

Q: Can these parts be used interchangeably in production?

A: Yes, within the specified parameter constraints. All parts maintain identical RF characteristics (impedance, frequency response, insertion loss) and mechanical interfaces (BNC bayonet lock, free-hanging configuration). Production changeover requires only termination method adjustment and cable group verification.