Amphenol RF BNC Connector Plug 112118 Equivalent & Substitute Parts

Part Overview

The Amphenol RF 112118 is a BNC connector plug designed for 50-ohm coaxial cable applications. This 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 The part is classified as "Not For New Designs," indicating it has been superseded in the product line. For new applications or when 112118 inventory is unavailable, equivalent substitute parts with active product status are available that maintain full electrical and mechanical compatibility.

Substiute Parts

112118

Amphenol RFIn Stock: 935112118 Datasheet

Current PartRFQ

31-321-RFX

Amphenol RFIn Stock: 106131-321-RFX Datasheet

DirectRFQ

112122

Amphenol RFIn Stock: 870112122 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 112118 are qualified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following criteria:

Electrical Parameters (Must Match):

• Connector style: BNC
• Connector type: Plug, Male Pin
• Impedance: 50 Ohms
• Frequency maximum: 4 GHz
• Voltage rating: 500 V
• Insertion loss: 0.2 dB

Mechanical Parameters (Must Match):

• Contact termination: Crimp
• Shield termination: Crimp
• Mounting type: Free Hanging (In-Line)
• Fastening type: Bayonet Lock
• Cable group compatibility: RG-59, 59B, 62, 140, 210, Belden 8241, 8263, 8279, 9209

Compliance Parameters (Must Match):

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all these criteria are direct electrical and mechanical equivalents suitable for interchangeable use in the same application circuit.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: Use part number 31-321-RFX or 112122. Both parts carry Active product status and are recommended for new circuit designs. Part 31-321-RFX includes an additional insulator component in its package (4 pcs vs. 3 pcs) and specifies operating temperature range of -65°C to 165°C. Part 112122 maintains identical specifications to 112118 with Active status.

For Legacy System Maintenance: Part 112118 remains available with 875 units in stock. This part is suitable for replacement and repair of existing systems where the connector is already in use. However, for new procurement, Active-status alternatives are preferred.

Compliance Considerations: All three parts are ROHS3 Compliant with MSL rating of 1 (Unlimited), ensuring compatibility with modern manufacturing and storage requirements. All parts carry REACH Affected status and EAR99 export classification.

Packaging Differences: Part 112118 is supplied in Bag packaging. Part 31-321-RFX is supplied in Bulk packaging. Part 112122 packaging is not specified. Packaging selection should align with procurement and assembly workflow requirements.

Frequently Asked Questions (FAQ)

Q: Can 31-321-RFX be used as a direct replacement for 112118?

A: Yes. Part 31-321-RFX is a direct electrical and mechanical equivalent. Both connectors maintain identical impedance (50 Ohms), frequency response (4 GHz maximum), voltage rating (500 V), and insertion loss (0.2 dB). Both support the same cable groups and use crimp termination for center contact and shield. The primary difference is product status: 31-321-RFX is Active while 112118 is Not For New Designs.

Q: What is the difference between 112118 and 112122?

A: Parts 112118 and 112122 are parametric equivalents with identical electrical and mechanical specifications. Both are BNC plug connectors with 50-ohm impedance, crimp termination, and 4 GHz frequency rating. The key difference is product status: 112122 is Active while 112118 is Not For New Designs. Both parts use brass body material with nickel finish and gold-plated brass center contacts.

Q: Does 31-321-RFX include different components than 112118?

A: Part 31-321-RFX includes 4 components (1 Connector, 1 Contact, 1 Ferrule, 1 Insulator) while 112118 includes 3 components (1 Connector, 1 Contact, 1 Ferrule). The additional insulator in 31-321-RFX does not affect electrical compatibility. Both parts are suitable for the same applications.

Q: What operating temperature range applies to these connectors?

A: Part 31-321-RFX specifies operating temperature of -65°C to 165°C. Parts 112118 and 112122 do not specify operating temperature limits in their documentation. For applications requiring defined temperature performance, 31-321-RFX is the appropriate selection.

Q: Are these connectors suitable for RG-59 cable?

A: Yes. All three parts (112118, 31-321-RFX, and 112122) are compatible with RG-59 cable as well as RG-59B, RG-62, RG-140, RG-210, and Belden 8241, 8263, 8279, and 9209 cables. Cable compatibility is identical across all substitute parts.

Q: What is the maximum frequency these BNC connectors support?

A: All three parts support a maximum frequency of 4 GHz. This specification applies to 112118, 31-321-RFX, and 112122.

Q: Are these connectors RoHS compliant?

A: Yes. All three parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.