903-731J-51A

Amphenol RF 903-731J-51A

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  • 903-731J-51A
  • Amphenol RF
  • CONN SMB JACK R/A 50 OHM PCB
  • Coaxial Connectors (RF)
  • 903-731J-51A Datasheet
  • -
  • -
  • Lead free / RoHS CompliantLead free / RoHS Compliant
  • 3246
  • Spot Inventory / Athorized Dstributor / Factory Excess Stock
  • 1 year quality assurance 》
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What is 903-731J-51A

Amphenol RF Part Number 903-731J-51A（Coaxial Connectors (RF)）, developed and manufactured by Amphenol RF, distributed globally by Jinftry. We distribute various electronic components from world-renowned brands and provide one-stop services, making us a trusted global electronic component distributor.

903-731J-51A is one of the part numbers distributed by Jinftry, and you can learn about its specifications/configurations, package/case, Datasheet, and other information here. Electronic components are affected by supply and demand, and prices fluctuate frequently. If you have a demand, please do not hesitate to send us an RFQ or email us immediately [email protected] Please inquire about the real-time unit price, Data Code, Lead time, payment terms, and any other information you would like to know. We will do our best to provide you with a quotation and reply as soon as possible.

903-731J-51A Specifications

  • Part Number903-731J-51A
  • CategoryCoaxial Connectors (RF)
  • ManufacturerAmphenol RF
  • DescriptionCONN SMB JACK R/A 50 OHM PCB
  • Package-
  • Series-
  • Mounting TypePanel Mount, Through Hole, Right Angle
  • Frequency - Max4GHz
  • Impedance50 Ohm
  • Mounting FeatureBulkhead - Front Side Nut
  • Connector TypeJack, Male Pin
  • Contact TerminationSolder
  • Connector StyleSMB
  • Fastening TypeSnap-On
  • Housing ColorGold
  • Shield TerminationSolder
  • Number of Ports1

Application of 903-731J-51A

Coaxial Connectors (RF) have become standard components in wireless communications, radio, television, radar, satellite communications and many other fields due to their excellent performance and a wide range of application scenarios. In the field of wireless communication, coaxial connectors are widely used in the connection of base stations, antennas, RF front ends and other equipment to ensure efficient transmission of signals in complex environments. In the field of broadcast television, it is used to connect transmitters, antennas and other equipment to ensure the clarity and stability of the signal. The field of radar and satellite communication is also inseparable from the support of coaxial connectors, which play an important role in high frequency and long distance signal transmission.

903-731J-51A Datasheet

903-731J-51A Datasheet , Panel Mount, Through Hole, Right Angle,4GHz,50 Ohm,Bulkhead - Front Side Nut,Jack, Male Pin,Solder,SMB,Snap-On,Gold,Solder,1

903-731J-51A Classification

Coaxial Connectors (RF)

Coaxial Connectors (RF), the radio frequency coaxial connector, is a professional connector for transmitting radio frequency signals. This type of connector is usually used in radio communications, radar systems, satellite communications, and radio and television. Coaxial connectors are designed with electrical performance and mechanical stability in mind to ensure low loss and high fidelity of RF signals during transmission.

FAQ about Coaxial Connectors (RF)

  • 1. What is the difference between RF connectors and coaxial connectors?

    Structure and performance indicators
    There are significant differences between RF connectors and coaxial connectors in structure, application scenarios and performance indicators.
    Structural differences
    Coaxial connector: Coaxial connector consists of inner conductor, insulation layer, outer conductor and sheath. The inner conductor is used to connect the signal line, and the outer conductor not only serves as the ground wire of the signal line, but also acts as a shield against electromagnetic fields to prevent signal interference.
    RF connector: RF connector usually refers to RF coaxial connector, which is similar in structure to coaxial connector, but RF connector focuses more on the transmission of high-frequency signals, so it has higher requirements in material selection and manufacturing process. .
    Differences in performance metrics
    Characteristic impedance: Characteristic impedance is an important indicator of RF coaxial connectors, which determines the impedance type of the cable connected to it. The characteristic impedance is determined by the inner diameter of the outer conductor, the outer diameter of the inner conductor, and the dielectric constant of the medium between the inner and outer conductors.
    Voltage standing wave ratio: The voltage standing wave ratio reflects the matching level of the connector and is an important parameter to measure the performance of the connector.
    To sum up, coaxial connector focuses more on general signal transmission, while RF connector focuses on optimized transmission of high-frequency signals. Both have different emphasis on structure, application scenarios and performance indicators.

  • 2. Are coaxial connectors the same as RCA?

    There are significant differences in appearance and purpose between coaxial connectors and RCA connectors.
    Coaxial connector is a common connector used in electronic equipment and communication systems. It is mainly used to connect coaxial cables to equipment or other circuits. It has good shielding performance and low loss characteristics, and is widely used in wireless communications, television, radio, radar and other fields.
    The RCA connector is an audio interface, usually used for the transmission of analog signals. There are two types of RCA interfaces: one is the RCA coaxial interface, which looks the same as the analog RCA interface, and the other is the BNC coaxial interface, which looks similar to the common signal interface on a TV and has a locking design. The impedance of RCA coaxial cable is 75 ohms. Although the appearance is the same as the analog RCA interface, mixed use will cause unstable sound transmission and affect the sound quality.
    Coaxial connectors and RCA connectors also differ in application scenarios and transmission characteristics.
    Coaxial cables are suitable for high-frequency signal transmission, such as television, Internet, and wireless communications, while RCA cables are suitable for low-frequency signal transmission, such as audio and standard-definition video‌3. In addition, the coaxial transmission impedance is constant and the transmission bandwidth is high, which can ensure the quality of the audio. However, the impedance of the RCA coaxial cable is also 75 ohms, and mixed use will lead to a decrease in sound quality.


  • 3. What is a coaxial F-type connector?

    Coaxial RF connector, F-type connector
    The coaxial F-type connector is a radio frequency coaxial connector, which is widely used in the fields of cable TV, satellite TV, cable TV modem and TV connection. It is characterized by threaded connection, convenient insertion, and stable performance. It is suitable for occasions with impedance matching requirements and non-matching occasions.
    Definition and historical background
    The F-type connector was first invented by Eric Winston in the early 1950s and became a common connection connector for VHF television antennas in the United States in the 1970s. Its characteristic impedance is 75 ohms, and the highest frequency can generally support 1GHz or 2.4GHz.

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Amphenol RF
Amphenol RF
Amphenol RF is the world's largest manufacturer of coaxial connectors for RF, microwave and data transmission system applications, and is a subsidiary of Amphenol Corporation. Headquartered in Danbury, Connecticut, USA, Amphenol RF has...
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