Amphenol RF 112427 BNC Coaxial Connector Equivalent & Substitute Parts

Part Overview

The Amphenol RF 112427 is an active BNC connector jack with female socket configuration, rated for 75 ohms impedance and panel mount installation via bulkhead rear side nut. This coaxial connector features solder cup termination for both center contact and shield, with extended insulation and bayonet lock fastening. The connector operates at frequencies up to 4 GHz with a 500 V voltage rating and 500 mating cycles. Substitute parts are identified when equivalent mechanical and electrical parameters are required for system integration, component availability, or inventory optimization within the same connector family.

Substiute Parts

112427

Amphenol RFIn Stock: 810112427 Datasheet

Current PartRFQ

112424

Amphenol RFIn Stock: 1429112424 Datasheet

Parametric EquivalentRFQ

112425

Amphenol RFIn Stock: 1316112425 Datasheet

Parametric EquivalentRFQ

112426

Amphenol RFIn Stock: 1318112426 Datasheet

Parametric EquivalentRFQ

112575

Amphenol RFIn Stock: 2284112575 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Amphenol RF 112427 are grouped based on mechanical and electrical compatibility within the BNC coaxial connector family. The primary substitution criteria are:

Mechanical Compatibility Parameters:

• Connector style (BNC)
• Connector type (Jack, Female Socket)
• Contact termination method (Solder Cup)
• Shield termination method (Solder Tag)
• Mounting type (Panel Mount)
• Mounting feature (Bulkhead - Rear Side Nut)
• Fastening type (Bayonet Lock)
• Number of ports (1)

Electrical Compatibility Parameters:

• Frequency maximum rating (4 GHz)
• Voltage rating (500 V)
• Mating cycles (500)
• Extended insulation feature

Impedance Consideration: The main part 112427 operates at 75 ohms impedance. Substitute parts include both 75 ohm variants (direct impedance match) and 50 ohm variants (alternative impedance specification). The 50 ohm substitutes are electrically compatible within the same connector family but serve different RF system requirements.

Material and Construction Variations: Substitute parts may differ in center contact material (Phosphor Bronze versus Beryllium Copper), body material (Brass versus Zinc Die Cast), and dielectric material (Polyoxymethylene versus Polytetrafluoroethylene), while maintaining mechanical and electrical interface compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Impedance Match (75 Ohms): Part 112425 is a direct electrical and mechanical equivalent to the main part 112427, both rated at 75 ohms impedance. Both parts share identical connector specifications, termination methods, mounting configurations, and frequency ratings. Selection between 112427 and 112425 is based on inventory availability and component sourcing requirements.

Alternative Impedance Specification (50 Ohms): Parts 112424, 112426, and 112575 operate at 50 ohms impedance and are mechanically compatible with the same panel mount bulkhead configuration and bayonet fastening system. These parts are suitable for RF systems designed for 50 ohm characteristic impedance. The 50 ohm variants maintain identical frequency ratings, voltage ratings, and mating cycle specifications.

Material Construction Variants: Parts 112424 and 112426 feature Phosphor Bronze center contacts and Brass body construction. Part 112575 features Beryllium Copper center contacts and Zinc Die Cast body construction with PTFE dielectric material, offering alternative material properties while maintaining the same electrical and mechanical interface specifications.

Compliance and Regulatory Status: All substitute parts maintain ROHS3 compliance and REACH affected status, consistent with the main part 112427. All parts are active products with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can part 112425 be used as a direct replacement for 112427? A: Yes. Part 112425 is mechanically and electrically identical to 112427, with both rated at 75 ohms impedance, identical connector type, termination methods, mounting configuration, and frequency specifications. Both parts are active products with established availability.

Q: What is the difference between the 75 ohm and 50 ohm variants? A: The impedance rating determines the characteristic impedance of the RF transmission line. The 75 ohm variants (112427 and 112425) are designed for 75 ohm systems, while the 50 ohm variants (112424, 112426, and 112575) are designed for 50 ohm systems. The mechanical interface and mounting specifications are identical across all variants.

Q: Are parts 112424 and 112426 interchangeable? A: Parts 112424 and 112426 are both 50 ohm BNC connectors with identical electrical and mechanical specifications. Both feature Phosphor Bronze center contacts and Brass body construction. Selection between these parts is based on inventory availability and sourcing requirements.

Q: How does part 112575 differ from parts 112424 and 112426? A: Part 112575 differs in center contact material (Beryllium Copper instead of Phosphor Bronze), body material (Zinc Die Cast instead of Brass), and dielectric material (PTFE instead of Polyoxymethylene). All three parts maintain identical 50 ohm impedance, mechanical interface, mounting configuration, and frequency specifications.

Q: Can I use a 50 ohm connector in a 75 ohm system? A: Mechanical compatibility exists between 50 ohm and 75 ohm BNC connectors due to identical bayonet fastening and panel mount specifications. However, impedance mismatch between the connector and the transmission line will result in signal reflections and degraded RF performance. System design requirements determine the appropriate impedance specification.

Q: What is the significance of the extended insulation feature? A: Extended insulation is a design feature present on all listed parts that provides additional dielectric material around the center contact, improving electrical isolation and voltage handling capability within the 500 V rating specification.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed (112424, 112425, 112426, and 112575) are ROHS3 compliant and REACH affected, consistent with regulatory requirements for the main part 112427.

Q: What is the package configuration for these connectors? A: All parts are supplied in bag packaging, with each connector including four components: 1 connector body, 1 lockwasher, 1 nut, and 1 solder tag for shield termination.