Amphenol RF 031-21 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-21 is an active BNC connector plug designed for 50-ohm coaxial cable applications. This male pin connector features solder termination and free-hanging (in-line) mounting, suitable for RF signal transmission up to 4 GHz. The connector is constructed with brass body, nickel finish, and silver-plated center contact, providing reliable performance across industrial and commercial applications. Substitute parts are identified to address inventory availability, extended lead times, or specific compliance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

031-21

Amphenol RFIn Stock: 918031-21 Datasheet

Current PartRFQ

1-221265-1

TE Connectivity Aerospace, Defense and MarineIn Stock: 1228101-221265-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Amphenol RF 031-21 with TE Connectivity Aerospace, Defense and Marine part number 1-221265-1 is based on strict equivalence of the following critical parameters:

Electrical Compatibility:

• Identical impedance specification: 50 Ohms
• Identical frequency maximum rating: 4 GHz
• Identical voltage rating: 500 V
• Identical operating temperature range: -65°C to 165°C

Mechanical Compatibility:

• Identical connector style: BNC
• Identical connector type: Plug, Male Pin
• Identical contact termination method: Solder
• Identical shield termination method: Clamp
• Identical mounting type: Free Hanging (In-Line)
• Identical fastening type: Bayonet Lock
• Identical number of ports: 1

Material and Construction:

• Identical body material: Brass
• Identical body finish: Nickel
• Identical dielectric material: Polytetrafluoroethylene (PTFE)
• Compatible cable groups with overlapping specifications: RG-59, 59B, 62, 210

Both connectors are active products with current manufacturing status and meet the same regulatory classifications (ECCN: EAR99, HTSUS: 8536.69.4010).

Parameter Comparison

Engineering Selection Recommendations

Both the Amphenol RF 031-21 and TE Connectivity 1-221265-1 are active products with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

Compliance and Certification:

• Amphenol RF 031-21: RoHS3 Compliant, REACH Affected
• TE Connectivity 1-221265-1: REACH status listed as Vendor Undefined

Moisture Sensitivity:

• Amphenol RF 031-21: MSL 1 (Unlimited)
• TE Connectivity 1-221265-1: MSL Not Applicable

Center Contact Plating:

• Amphenol RF 031-21: Silver plating
• TE Connectivity 1-221265-1: Gold plating

Cable Compatibility:

• Amphenol RF 031-21: RG-59, 59B, 62, 140, 210, Belden 8241, 8263, 8279, 9209
• TE Connectivity 1-221265-1: RG-59, 59A, 59B, 62, 62A, 62B, 71, 71A, 71B, 210

Included Components:

• Amphenol RF 031-21: 7 pieces (includes Insulator)
• TE Connectivity 1-221265-1: 6 pieces (no Insulator)

Both connectors meet the same regulatory export classifications and tariff codes, confirming functional equivalence for RF coaxial applications.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1-221265-1 be used as a direct replacement for the Amphenol RF 031-21?

A: Yes. Both connectors meet identical electrical specifications (50 Ohms, 4 GHz maximum frequency, 500 V rating) and mechanical requirements (BNC plug, male pin, solder termination, bayonet lock fastening, free-hanging mounting). The connectors are functionally equivalent for RF signal transmission applications.

Q: What is the difference in center contact plating between these two parts?

A: The Amphenol RF 031-21 features silver-plated center contact, while the TE Connectivity 1-221265-1 features gold-plated center contact. Both platings provide adequate electrical conductivity and corrosion resistance for 50-ohm RF applications. Gold plating offers enhanced corrosion resistance in high-humidity environments.

Q: Are there cable compatibility differences between these connectors?

A: Both connectors support RG-59, 59B, 62, and 210 cable groups. The TE Connectivity 1-221265-1 additionally supports RG-59A, 62A, 62B, 71, 71A, and 71B cables. The Amphenol RF 031-21 additionally supports Belden 8241, 8263, 8279, and 9209 cables. Verify specific cable compatibility with your application requirements.

Q: What is the difference in included components?

A: The Amphenol RF 031-21 includes 7 components (connector, braid clamp, clamp, contact, gasket, insulator, and washer). The TE Connectivity 1-221265-1 includes 6 components (connector, clamp braid, clamp, contact, gasket, and washer). The Amphenol part includes an additional insulator component.

Q: Do both connectors meet RoHS compliance?

A: The Amphenol RF 031-21 is RoHS3 Compliant. The TE Connectivity 1-221265-1 RoHS status is not specified in the provided data. Confirm RoHS compliance requirements with your procurement specifications before selection.

Q: What is the maximum operating frequency for these connectors?

A: Both connectors are rated for maximum frequency operation of 4 GHz, suitable for standard RF and microwave signal transmission applications within this frequency range.

Q: Are these connectors suitable for outdoor or weatherproof applications?

A: The Amphenol RF 031-21 is specified as weatherproof. The TE Connectivity 1-221265-1 ingress protection rating is not specified in the provided data. For outdoor or harsh environment applications, confirm environmental protection requirements with the TE Connectivity manufacturer.