KH-FKRM-1003-03D Purple FAKRA PCB-Mount Connector: Designed for In-Vehicle Navigation RF Applications

With the continuous development of automotive electronics, in-vehicle navigation, and wireless communication technologies, RF connectors are increasingly used in a wide range of electronic devices. Thanks to their standardized interfaces, easily identifiable housing designs, and reliable RF connections, FAKRA connectors have become common components in automotive RF systems.

Today, we introduce the KH-FKRM-1003-03D, a purple, right-angle, male FAKRA PCB-mount connector developed by Kinghelm.

1. Product Overview

The KH-FKRM-1003-03D is a FAKRA PCB-mount connector designed for RF signal connections. It features a 90° right-angle configuration and through-hole mounting, making it suitable for electronic devices with specific interface orientation and PCB space requirements. The connector is purple, has a nominal operating frequency range of DC to 6 GHz, and features a characteristic impedance of 50Ω, providing a connection solution for compatible RF systems.

The main specifications are listed below:

2. What Is a FAKRA Connector?

A FAKRA connector is an RF coaxial connector widely used in automotive electronics. Typical applications include in-vehicle navigation systems, automotive antennas, connected vehicle systems, and wireless communication equipment. Its design addresses not only RF signal transmission but also interface identification, mechanical misconnection prevention, and ease of assembly.

A typical FAKRA connector consists of a center conductor, dielectric insulator, outer conductor, plastic housing, and mechanical keying structure. The center conductor carries the RF signal, while the dielectric maintains the relative positioning of the conductors. The outer conductor provides the return path and shielding. The plastic housing and keying structure help identify the interface type and reduce the risk of incorrect mating during assembly.

FAKRA connectors are available in different housing colors and mechanical coding configurations. However, color is only an identification aid. Actual selection requires verification of the specific model, coding configuration, and mating interface. Compatibility should never be determined by color alone.

3. Key Features of the KH-FKRM-1003-03D

1. 90° Right-Angle Design for Optimized Installation

The KH-FKRM-1003-03D features a 90° right-angle configuration that changes the direction of the RF interface. In electronic devices with limited internal space, where cables need to exit horizontally or PCB layouts are constrained, this design provides greater flexibility for installation.

Design engineers can optimize the connector layout by considering enclosure openings, cable routing, and the positions of surrounding components.

2. DC–6 GHz Frequency Range for a Variety of RF Connection Requirements

The connector has a nominal frequency range of DC to 6 GHz, providing a basis for evaluating its suitability for RF connections within the specified range. In practical applications, engineers should also verify parameters such as return loss and insertion loss at the target operating frequencies to ensure that the connector meets the system's signal transmission requirements.

3. 50Ω Characteristic Impedance for Common RF Systems

A characteristic impedance of 50Ω is widely used in RF communication systems. A 50Ω connector helps maintain impedance matching with compatible coaxial cables, antennas, and communication modules, reducing the risk of signal reflections caused by impedance discontinuities.

4. Through-Hole Mounting for Convenient PCB Integration

This model uses a through-hole mounting configuration and is designed for installation through corresponding PCB holes and soldering structures. The PCB-mount interface facilitates the integration of external RF connections into electronic modules, supporting equipment layout and assembly.

The specific pad dimensions, pin arrangement, and installation tolerances should be verified against the official product drawings.

5. Wide Operating Temperature Range for Various Environments

The specified operating temperature range is -40°C to +105°C, providing a reference for evaluating the connector in different temperature environments.

For automotive electronics and other demanding applications, overall connection reliability should also be assessed against requirements for vibration, shock, humidity, and temperature cycling.

4. Applications of the KH-FKRM-1003-03D

The Kinghelm KH-FKRM-1003-03D is a purple, right-angle male FAKRA coaxial connector designed for PCB mounting. With a nominal frequency range of DC to 6 GHz and a characteristic impedance of 50Ω, it can be evaluated for applications such as in-vehicle navigation, automotive antennas, vehicle communication systems, and RF modules, subject to interface compatibility and electrical performance requirements.

1. In-Vehicle Navigation Systems

In in-vehicle navigation systems, this connector can be considered as a PCB-mounted interface for navigation-related RF modules requiring compatible antenna signal connections.

Its PCB-mount configuration facilitates integration into navigation device circuit boards, while the 90° right-angle design helps accommodate enclosure space and interface orientation requirements. Before implementation, engineers should confirm that the navigation antenna's operating frequency and mating interface are compatible.

2. Automotive Antenna Systems

Automotive antenna systems support the reception and transmission of navigation, wireless communication, and other RF signals. Depending on the antenna interface, RF specifications, and mechanical design requirements, the KH-FKRM-1003-03D may be evaluated as a PCB-mount connector for providing RF interconnections between antennas and electronic modules.

3. In-Vehicle Communication and Connected Vehicle Equipment

Automotive communication controllers and connected vehicle devices typically require RF connections to compatible antennas or communication modules. With its 50Ω characteristic impedance and nominal frequency range of DC to 6 GHz, this connector can be evaluated for RF interconnection solutions that meet the relevant interface requirements.

Its suitability for cellular communication or other wireless applications must be confirmed against the target frequency bands and actual electrical performance specifications.

4. In-Vehicle Infotainment Systems

In-vehicle infotainment systems may integrate navigation, radio reception, and wireless communication functions, creating specific requirements for RF interface layout and assembly.

The right-angle design of the KH-FKRM-1003-03D provides additional options for internal connector placement, while its through-hole mounting configuration supports PCB integration. During design, engineers should consider installation height, enclosure openings, and cable routing.

5. RF Modules and Related Electronic Equipment

Beyond automotive electronics, this connector may also be evaluated for other electronic devices requiring a FAKRA interface, 50Ω RF transmission, and a right-angle PCB-mount connection.

Because FAKRA connectors have specific mechanical structures and coding requirements, compatibility with the mating connector and RF performance across the target frequency range must be verified before use.

Overall, the KH-FKRM-1003-03D is a candidate for design projects requiring a PCB-mounted FAKRA interface, a right-angle connection, and 50Ω RF transmission. Its suitability for a particular application should be confirmed using the official product specifications and actual test results.

Kinghelm KH-FKRM-1003-03D Product Datasheet

5. Key Parameters to Consider When Selecting FAKRA Connectors

When selecting a FAKRA connector, engineers should consider more than its appearance and interface type. Key parameters include frequency range, characteristic impedance, operating temperature, mechanical dimensions, and interface coding.

First, the frequency range determines the operating bands for which the connector can be evaluated. For the KH-FKRM-1003-03D, its RF performance should be verified against the actual frequency requirements of the target application.

Second, the 50Ω characteristic impedance should match that of the associated RF cables, antennas, and modules to minimize signal reflections caused by impedance mismatches.

Mechanical dimensions directly affect PCB layout and equipment assembly. The KH-FKRM-1003-03D has an interface diameter of 7.5 mm and an interface length/height of 14.35 mm. Design engineers should consult the official dimensional drawing to verify installation space, pin positions, and PCB footprint requirements.

The FAKRA coding configuration, mating interface structure, and male/female designation should also be confirmed to prevent assembly problems caused by incompatible interfaces.

For automotive electronics and other demanding applications, additional factors such as vibration, shock, temperature cycling, and long-term operating conditions should be considered. If the project specifies requirements for return loss, insertion loss, shielding performance, or environmental certifications, engineers should obtain the relevant specifications and test reports from the supplier to ensure that the selected connector meets the application requirements.

6. Conclusion

The Kinghelm KH-FKRM-1003-03D is a purple, right-angle male FAKRA coaxial connector designed for PCB mounting. It features a nominal frequency range of DC to 6 GHz, a characteristic impedance of 50Ω, and an operating temperature range of -40°C to +105°C. Its right-angle configuration and through-hole mounting design provide additional flexibility for RF interface layout and PCB integration.

For in-vehicle navigation systems, automotive antennas, vehicle communication equipment, in-vehicle infotainment systems, and related RF electronic devices, this model can be considered as a candidate connector during the design and selection process.

Before implementation, it is recommended that engineers consult the official product datasheet and mechanical drawings, verify mating interface compatibility, and evaluate RF performance under the intended operating conditions to achieve reliable RF connectivity.

About Kinghelm

Kinghelm (www.kinghelm.net) specializes in microwave RF and connectivity technologies. Its main product portfolio includes BeiDou/GPS antennas, Bluetooth antennas, Wi-Fi antennas, RF jumper cables, signal connectors, board-to-board connectors, sockets and pin headers, electronic switches, automotive wiring harnesses, adapter cables, pin headers, terminals, RF cables, GPS antennas, tactile switches, detection switches, toggle switches, push-button switches, micro switches, multifunction switches, illuminated switches, DIP switches, rocker switches, headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, and Type-C connectors.

These products are widely used in consumer electronics, industrial control, smart vehicles, and IoT communications. Kinghelm's certifications include ISO 9001, RoHS, and REACH. The company provides standardized in-stock products as well as customized solutions, offering integrated product support to global customers seeking reliable connectivity and signal transmission solutions.

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