LMR300 Coaxial Cable 50 Ohms BLACK PE[Video]
TIMES MICROWAVE - 5/16 LMR-300 COAX CABLE
LMR300 is a coaxial cable. So this article is going to talk about the detailed information about LMR300.

Termination of LMR-300 cable
Overview of LMR300
The Times Microwave LMR®-300 5/16 in low loss coaxial cable performs similarly to corrugated copper cables, but with more flexibility and a simpler connection. This 50 Ohm coaxial cable has a bare copper center conductor and a stranded outside conductor for a 1 in bending radius. The use of a shield that is 90% braided results in a minimal loss. Polyethylene foam provides insulation.
LMR300 Features
Priced Per Foot
Cable Type: LMR300
Impedance: 50 ohm
Outside Diameter: 10.29 mm
Capacitance: 78.4pF
Operating Temperature: -40°C~85°C
Shield Type: Braid
Jacket (Insulation) Material: Polyethylene (PE)
Max Continuous Length: 1000 FT
LMR300 Coaxial Cable Structure Figure


Specifications
- TypeParameter
- Factory Lead Time8 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Cable - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
300 - Dielectric Material
a substance that is a poor conductor of electricity, but an efficient supporter of electrostatic field s.
Foam Polyethylene (FPE) - Conductor Material
A conductor is a material which contains movable electric charges. In metallic conductors, such as copper or aluminum, the movable charged particles are electrons, though in other cases they can be ions or other positively charged species.
Copper, Bare - Jacket (Insulation) Material
The parameter "Jacket (Insulation) Material" in electronic components refers to the material used to cover and protect the internal components of a cable or wire. This material provides insulation to prevent electrical interference, short circuits, and damage from environmental factors such as moisture, heat, and chemicals. Common jacket materials include PVC (polyvinyl chloride), Teflon, rubber, and polyethylene. The choice of jacket material depends on the specific application requirements, such as temperature range, flexibility, and resistance to abrasion. Selecting the appropriate jacket material is crucial for ensuring the reliability and longevity of the electronic component in its intended operating conditions.
Polyethylene (PE) - Shield Material
Shield Material in electronic components refers to the material used to create a shield or barrier that protects the component from electromagnetic interference (EMI) or radio frequency interference (RFI). The shield material is typically a conductive material such as copper or aluminum that is capable of blocking or absorbing unwanted electromagnetic signals. By using the appropriate shield material, electronic components can maintain their performance and reliability in environments where EMI or RFI may be present. The effectiveness of the shield material is crucial in ensuring the proper functioning of electronic devices and preventing interference from external sources.
Aluminum; Copper, Tinned - Cable TypesCoaxial
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Impedance
In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit.
50Ohms - Jacket Color
The parameter "Jacket Color" in electronic components refers to the color of the protective outer layer that encases wires, cables, or other electronic components. This color can indicate specific attributes such as the type of insulation material, intended use, or compliance with certain standards. Different colors might be used to distinguish between various types of signals, voltage levels, or applications, providing a visual means of identifying components in a system. Additionally, the jacket color can also influence heat dissipation and aesthetic appeal in electronic assemblies.
Black - Conductor Strand
Stranded conductors are composed of uninsulated “strands” of wire twisted together. The advantages of conductor stranding over a single strand of equal cross-section are increased flexibility and flex-fatigue life.
Solid - Jacket (Insulation) Diameter
The "Jacket (Insulation) Diameter" parameter in electronic components refers to the outer diameter of the insulation or protective jacket surrounding a wire or cable. This measurement is important for determining the overall size and compatibility of the component within a system or circuit. A larger jacket diameter may provide better protection against environmental factors and mechanical stress, while a smaller diameter may be more flexible and space-saving. It is crucial to consider the jacket diameter when selecting and installing electronic components to ensure proper fit and functionality.
0.300 (7.62mm) - Shield Type
Shield Type in electronic components refers to the method used to protect sensitive circuits from electromagnetic interference (EMI) and radio frequency interference (RFI). It encompasses the materials and techniques employed to create barriers around wires, circuits, or devices, which may include metallic enclosures, conductive coatings, or grounding practices. The choice of shield type can significantly impact the performance and reliability of electronic systems, especially in environments with high levels of interference.
Foil, Braid - Dielectric Diameter
Dielectric diameter is a parameter used in electronic components, particularly in capacitors. It refers to the physical size of the dielectric material within the capacitor. The dielectric material is an insulating substance that separates the two conductive plates of the capacitor. The dielectric diameter is important because it affects the capacitance value and performance of the capacitor. A larger dielectric diameter typically results in a higher capacitance value and better insulation properties. Manufacturers specify the dielectric diameter to ensure proper functioning of the capacitor in electronic circuits.
0.190 (4.83mm) - VoP, Velocity of Propagation
The Velocity of Propagation (VoP) is a parameter used to describe the speed at which an electrical signal travels through a medium, such as a cable or transmission line, in electronic components. It is typically expressed as a percentage of the speed of light in a vacuum. A higher VoP indicates that the signal propagates faster through the medium, which can affect the overall performance of the electronic system. VoP is an important consideration in designing and analyzing high-speed digital communication systems to ensure signal integrity and minimize signal distortion. It is also used in determining the delay characteristics of signals in transmission lines and is a key factor in determining the maximum operating frequency of a system.
82 - Length500.0' 152.40m
- RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
RoHS Compliant
LMR300 Attentuation VS Frenquency

LMR300 Attentuation VS Frequency
LMR300 Parameters
| Typical Electrical Specifications | Typical Mechanical Specifications | ||
| Operating frequency range | DC to 24.5 GHz | Inner conductor (mm) | 1.78 |
| Capacitance (pF/m) | 79.1 | Dielectric (mm) | 4.83 |
| The velocity of propagation (%) | 85 | Outer conductor (mm) | 5.72 |
| Shielding effectiveness (dB) | >90 | Jacket (mm) | 7.62 |
| Maximum operating voltage (VK RMS ) | 5 | Operating temperature | -40 to +80 °C |
LMR300 Specifications
| Product Code | 201-302 |
| Series | LMR-300 |
| Inner Conductor | Solid BC |
| Inner Conductor | Solid BC |
| Dielectric | Foam PE |
| Outer Conductor | Aluminum Tape |
| Outer Conductor | Aluminum Tape |
| Overall Braid | Tinned Copper |
| Cable | LMR-300 |
| Outer Jacket | PE |
| Dia Inner Conductor | 1.78 |
| Dia Dielectric | 4.83 |
| Dia Outer Conductor | 4.98 |
| Dia Overall Braid | 5.72 |
| Dia Over Jacket | 7.62 |
| Max Frequency | 24.5 |
| Velocity | 85 |
| DC Breakdown | 2000 |
| Peak Power Rating | 10 |
| Jacket Spark | 5000 |
| Capacitance | 78.4 |
| Inductance | 0.2 |
| Operating Temp | Minus 40 to Plus 85 |
| Min Bending Radius | 22.2 |
| Cable Weight | 0.08 |
| Attenuation 30 MHz | 3.5 |
| Attenuation 50 MHz | 4.5 |
| Attenuation 150 MHz | 7.9 |
| Attenuation 220 MHz | 9.6 |
| Attenuation 450 MHz | 13.8 |
| Attenuation 900 MHz | 19.9 |
| Attenuation 1500 MHz | 26 |
| Attenuation 1800 MHz | 28.7 |
| Attenuation 2000 MHz | 30.3 |
| Attenuation 2500 MHz | 34.2 |
Related Articles about cables
LMR300 Manufacturer
Times Microwave Systems is a pioneer in the development and manufacture of coaxial transmission lines. For military, aerospace, wireless communications, and industrial applications, they offer a wide range of RF and microwave transmission line solutions. In the industry, its engineering competence and range of manufacturing capabilities are well acknowledged. They can serve both specialist applications with extremely demanding performance requirements and high volume commercial applications at frequencies ranging from a few kHz to 110 GHz, thanks to production sites in the United States and China. Since 2009, Times Microwave Systems has had access to the resources of Amphenol, one of the world's largest makers of interconnect components. Amphenol Corporation is a manufacturer of electrical, electronic, and fiber-optic connectors, as well as connection systems and coaxial and specialized cable.
Note: LMR® is a registered trademark of Times Microwave Systems.
Datasheet PDF
- Datasheets :
Popularity by Region
What is LMR-300 cable used for?
The Times Microwave LMR-300 5/16 in low loss coaxial cable provides similar performance but with more flexibility and a simpler connection.
What does LMR mean in coaxial cable?
Low Loss.
What’s the operating temperature of LMR-300?
-40 to +80 °C.
What’s the capacitance of LMR-300?
79.1 pF/m.
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