Amphenol RF 68175 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The Amphenol RF 68175 is a BNC connector plug designed for 50-ohm coaxial cable applications. This straight, male-pin connector features crimp termination for both center contact and shield, with a bayonet lock fastening mechanism. The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Equivalent and substitute parts are necessary to support existing installations, legacy system maintenance, and to identify active production alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

68175

Amphenol RFIn Stock: 106668175 Datasheet

Current PartRFQ

31-321-RFX

Amphenol RFIn Stock: 106131-321-RFX Datasheet

DirectRFQ

1-5221128-1

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

SimilarRFQ

225395-2

TE Connectivity AMP ConnectorsIn Stock: 835225395-2 Datasheet

SimilarRFQ

227079-7

TE Connectivity AMP ConnectorsIn Stock: 933227079-7 Datasheet

SimilarRFQ

5227079-7

TE Connectivity AMP ConnectorsIn Stock: 12005227079-7 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of BNC connector plugs is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: BNC
• Connector Type: Plug, Male Pin
• Impedance: 50 Ohms
• Contact Termination: Crimp
• Shield Termination: Crimp
• Mounting Type: Free Hanging (In-Line)
• Fastening Type: Bayonet Lock
• Number of Ports: 1

Compatible Cable Groups: All substitute parts support RG-59, 59B, 62, 140, and 210 cable types, with extended compatibility in certain alternatives.

Frequency Consideration: The main part (68175) operates to 2 GHz. Substitute parts operating at 4 GHz provide extended frequency capability and are electrically compatible for applications within the 2 GHz specification.

Electrical Performance: All parts maintain 500 V voltage rating, 500 mating cycles, and 0.2 dB insertion loss, ensuring functional equivalence in signal integrity and durability.

Material and Environmental Compatibility: Substitutes vary in body material (brass versus zinc die cast), dielectric material (PTFE, POM acetal, or polyethylene), and operating temperature ranges. These variations do not affect electrical compatibility within specified operating conditions.

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs: The Amphenol RF 31-321-RFX is the primary recommended substitute. It maintains ROHS3 compliance, carries Active product status, and provides extended frequency capability to 4 GHz. This part is suitable for applications requiring current manufacturing support and regulatory compliance.

For TE Connectivity Ecosystem Integration: The TE Connectivity 227079-7 is an Active product offering electrical and mechanical equivalence. It supports the same cable groups and maintains 500 V voltage rating and 0.2 dB insertion loss. However, it carries RoHS non-compliant status, requiring evaluation against specific regulatory requirements.

For Legacy System Support: The TE Connectivity 225395-2 provides Active product status with full electrical compatibility. Operating temperature range is limited to -55°C to 85°C compared to the main part's -65°C to 165°C specification. This part is suitable for applications within the reduced temperature envelope.

Obsolete Parts (Not Recommended for New Procurement): TE Connectivity 1-5221128-1 and 5227079-7 carry Obsolete status and should not be selected for new designs or long-term inventory planning. These parts are listed for reference in legacy system documentation only.

Compliance Considerations: Applications requiring ROHS3 compliance should prioritize Amphenol RF 31-321-RFX or TE Connectivity 5227079-7. Applications with RoHS non-compliance acceptance may utilize TE Connectivity 227079-7 or 225395-2.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol RF 68175 be directly replaced with the 31-321-RFX?

A: Yes. Both parts share identical connector style, type, impedance, termination method, mounting configuration, and fastening mechanism. The 31-321-RFX provides extended frequency capability to 4 GHz while maintaining all electrical performance specifications. The 31-321-RFX is Active status, making it the preferred forward-compatible choice.

Q: What is the difference between Amphenol RF and TE Connectivity BNC plugs in this list?

A: Both manufacturers produce electrically equivalent 50-ohm BNC connector plugs with identical impedance, voltage rating, mating cycles, and insertion loss. Differences exist in body material composition, dielectric material, operating temperature ranges, and RoHS compliance status. Selection depends on supply chain preference, regulatory requirements, and temperature operating envelope.

Q: Are all substitute parts compatible with RG-59 and RG-62 cables?

A: Yes. All parts in this list support RG-59, 59A, 59B, 62, 62A, and 62B cable types. The main part (68175) and Amphenol RF 31-321-RFX additionally support RG-140, RG-210, and Belden 8241, 8263, 8279, 9209 cable types.

Q: What is the significance of the 2 GHz versus 4 GHz frequency rating?

A: The main part operates to 2 GHz maximum frequency. Substitute parts rated to 4 GHz provide extended frequency capability and are electrically compatible for all applications within the 2 GHz specification. The higher frequency rating does not affect performance in lower-frequency applications.

Q: Which substitute part has the widest operating temperature range?

A: The Amphenol RF 31-321-RFX maintains the same operating temperature range as the main part: -65°C to 165°C. TE Connectivity parts are limited to -55°C to 85°C. For applications requiring the full -65°C to 165°C envelope, the 31-321-RFX is the appropriate selection.

Q: Are there packaging differences between these parts?

A: The main part (68175) and Amphenol RF 31-321-RFX are supplied in Bulk packaging. TE Connectivity parts do not specify packaging format in the available data. Packaging should be confirmed with the supplier for specific procurement requirements.

Q: What does "Not For New Designs" status mean for the 68175?

A: This designation indicates the part has been superseded by the manufacturer and is no longer recommended for new product development. The Amphenol RF 31-321-RFX is the active replacement. Existing inventory of the 68175 may be used for legacy system maintenance and repair.

Q: Can I use an Obsolete part as a substitute?

A: Obsolete parts (1-5221128-1 and 5227079-7) are electrically and mechanically compatible but carry discontinued status. They should not be selected for new procurement or long-term inventory planning. Use only for immediate legacy system repairs when Active alternatives are unavailable.

Q: What is the difference in included components between parts?

A: The main part (68175) includes 3 pieces: connector, contact, and ferrule. The Amphenol RF 31-321-RFX includes 4 pieces: connector, contact, ferrule, and insulator. TE Connectivity parts include either 3 pieces (225395-2, 227079-7) or 4 pieces with spacer (1-5221128-1, 5227079-7). Verify kit contents match assembly requirements.

Q: Which part should I select for RoHS3 compliance?

A: The Amphenol RF 31-321-RFX carries ROHS3 Compliant status. The TE Connectivity 5227079-7 carries RoHS Compliant status. The TE Connectivity 227079-7 and 225395-2 are RoHS non-compliant. For ROHS3 specifically, select the 31-321-RFX.