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The Best Coaxial Relays

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Coaxial relays are critical components in radio frequency (RF) systems, ensuring signal integrity and efficient switching. Selecting the appropriate relay is paramount for reliable performance in applications ranging from amateur radio to professional test equipment. Understanding key specifications will help you make an informed decision for your specific needs.

Looking for the best Coaxial Relays?

Discover now our comparison of the best Coaxial Relays. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Coaxial Relays are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Coaxial Relays in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.

No. 1
Electromagnetic Power Relay, 8-Pin 10 AMP 110V/120V AC Relay Coil with Socket Base, LED Indicator, DPDT 2NO...
  • Electromagnetic relays are widely used: household air conditioner compressor motors, fan motors, cooling pump motors, starter relays for car starters, spur relays, motors, generator circuit breakers, industrial relays, etc
  • Product Name: Electromagnetic Power Relay; Model: YJ2N-LY Type: DPDT; number of terminals: 8
  • Coil voltage: 110V/120V AC; Contact capacity: 10A 240VAC
  • Red mechanical indicatoe:It can intuitively judge whether the relay is attracted
  • LED signal lamp : It can judge the AC or DC coil, and judge whether the coil is energized
No. 2
AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level...
  • 5V Relay Module: Working Voltage: DC 5V; Maximum Load: AC 250V/10A, DC 30V/10A; Trigger Current of Opto-Isolator: 5mA
  • Fault-Tolerant Design: Fault Tolerant Design, Even if the Control Line is Broken, the Relay will not Operate;All Interfaces of Relay can be Wired Out Through the Terminals Directly,Normally Open and Normally Closed
  • Optocoupler Isolation:1 Channel Relay Board use Optocoupler Isolation that has Strong Driving Ability and Stable Performance ,The Isolation Circuit Prevent Damages to I / O Port by Relay Switch Current
  • Jumper Design: The Relay Module has a Jumper That You Can Set Rather the Unit State Changes with High or Low Signal. Has Screw Terminals for Relay (NC,C,NO) and for Input; Coil +, Coil - and Trigger.
  • Wide Application: DC 5V Relay Module Works Well with ARM /PIC /AVR /MCU/Raspberry/CNC Machine/ PS4 etc.
No. 3
Schneider, CA3KN40BD, Control Relay, 4No, 24 Vdc, 69 Screw Clamps, Tesys K Series
  • Schneider Electric - Controls
  • Schneider Electric - Accessories
SaleNo. 4
Tnisesm 2PCS Power Relay AC120V Coil, 30A SPDT(1NO 1NC) with Flange Mounting and 10 Quick Connect Terminals...
  • Product Type: Power Relay with Terminal Wires; SPDT(1NO 1NC)
  • Coil Voltage : AC 120V; 30A SPDT 240VAC
  • Easy to use: Attached with crimping terminals wires for worry-free installation.
  • Epoxy sealed versions available
  • Package Content : 2 x Power Relay, 10 Terminal Wires
No. 5
OONO DPST 1NO 1NC 8Amp Power Relay Module, AC/DC 12V Control Voltage
  • Input control signal: Voltage AC or DC 12V, Current 33mA.
  • Output switch DPST 1NO 1NC(Double Pole Single Throw, 1x Normally Open and 1x Normally Close ), rated current 8A/250VAC or 8A/30VDC (one switch).
  • Compact plastic case and wires connects for easy mount. LED indication for relay action.
  • This is a simple and practical passive relay module, which is very convenient to use. It can support both Normally Open and Normally Close. Two screw mounting holes are convenient for you to fix it on the wall or wooden board. Of course, you can also...
No. 7
HiLetgo 2pcs 5V 30A One Channel Relay Module Optocoupler Isolation High and Low Trigger 5V
  • 5V 12V 24V 30A One Channel Relay Module Optocoupler Isolation High and Low Trigger
  • With optocoupler isolation, strong drive capability, stable performance; trigger current 5mA.
  • Friendly interface design, all interfaces can be directly connected through the terminal leads, very convenient.
No. 8
CHUNYE Coaxial Switch SMA Female Single Pole Double Throw Mechanical Switch Relay 12V/24V DC-18GHz(SPDT18G12V...
  • Low insertion loss: They have very low insertion loss.
  • Fast switching time: Coaxial switches usually have very fast switching times.
  • High power handling capability: Coaxial switches are typically capable of handling high-power signals.
  • Reliability and durability: Coaxial switches often operate reliably in extreme environments.
  • Compact design: Coaxial switches are usually designed to be very compact, making them easy to install and use.
No. 9
Relay, 12V 200A Starter Relay,Normal Open Heavy Duty Car Truck Starter Relay with Terminals, Relay, Coaxial...
  • Widely used on the automotive, oversize vehicles and other large vehicles for starting, also could use on high-current current control system of large variety.
  • High 200A coil capacity- able to handle those high current applications with ease.
  • This product is a car start relay used for control battery ON/OFF .
  • It features great stable working performance, and great dust proof function .
  • The relay is normally open, and 4-pin relay type, and rated current is 200A, rated voltage is 12VDC.
No. 10
Natec 5D-2V Coaxial Cable, Relay Cable, 39.4 ft (100 cm) MP-MP DV510M
  • Cable length: 3.3 ft (1 m)
  • Fitting: MP-MP
  • 5D-2V Coaxial Cable

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Last update on 2026-04-16 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Coaxial Relays

Understanding Key Specifications

Choosing a coaxial relay involves evaluating several technical parameters. Frequency Range is crucial; ensure the relay operates effectively at your intended frequencies, often measured in MHz or GHz. Impedance should match your system, typically 50 or 75 ohms, to minimize signal reflections and loss. Isolation (or crosstalk) indicates how well the relay prevents signals from leaking between ports when switched, important for maintaining signal purity. Insertion Loss refers to the signal power lost as it passes through the relay, and lower is always better.

Types of Coaxial Relays

Coaxial relays come in various forms, each suited for different applications. SPDT (Single Pole, Double Throw) relays are common, allowing a single input to be switched to one of two outputs. SP4T (Single Pole, Four Throw) and higher configurations offer more switching options. Latching relays maintain their last position without continuous power, saving energy, while non-latching relays return to a default state when power is removed. Consider the switching speed and power handling capabilities required for your setup.

Durability and Environmental Factors

Beyond electrical performance, the physical construction and operational environment are important. Look for relays with robust housing materials that can withstand vibration and shock if your application demands it. Consider the operating temperature range and humidity ratings if the relay will be used in challenging conditions. The lifespan, often rated in switching cycles, should also align with your expected usage to ensure long-term reliability.

Frequently Asked Questions

What is the difference between latching and non-latching coaxial relays?
Latching relays hold their position even after power is removed, making them energy-efficient for static switching. Non-latching relays revert to their default state when power is cut, requiring continuous power to maintain a specific connection.
Why is impedance matching important for coaxial relays?
Impedance matching, typically to 50 or 75 ohms in RF systems, is vital to prevent signal reflections. Mismatched impedance can lead to signal loss and degradation, affecting overall system performance.
What does 'insertion loss' mean in the context of coaxial relays?
Insertion loss is the amount of signal power that is lost when the signal passes through the relay's contacts. Lower insertion loss is desirable as it means less signal degradation and more signal strength reaching the intended destination.
How does isolation affect a coaxial relay's performance?
Isolation, also known as crosstalk, measures how effectively the relay prevents unwanted signal leakage between unconnected ports. High isolation is crucial for applications where signal purity is critical, preventing interference between different signal paths.
What frequency range should I look for?
The required frequency range depends entirely on your application. Ensure the relay's specified operating frequency range encompasses the highest frequency you intend to use to guarantee optimal performance and minimal signal attenuation.