RF Terminators

RF terminators are devices used to electrically terminate coaxial RF (radio frequency) ports. They are usually placed at the end of the transmission line to prevent an RF signal from being reflected.

RF terminators are designed to match the surge impedance (ratio of current and voltage) of the cable to help minimise signal reflections and power losses. Unused tap ports or coaxial faceplates in a home, for example, can create entry and exit paths, which affect performance.

How do RF terminators work?

RF terminators absorb the electrical energy of the signal as it reaches the cable ends and prevents the signal from being reflected so it doesn’t become noise. They ensure that current flows smoothly from one device to another.

What are RF terminators used for?

RF terminators play a critical role in high-frequency systems and circuits, especially when managing high-power signals. They can also be used to close open terminations that might otherwise allow parasitic signals to enter the circuit, such as at a T-junction.

RF terminators are available in many form factors with power ratings to match their sizes.


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Description Price Interface Type Gender Body Orientation Mounting Type Impedance Body Plating Cable Type Operating Frequency Average Power Rating Low Power Contact Material Contact Plating Termination Method
RS Stock No. 263-2716
Mfr. Part No.R404101000W
BrandRadiall
£3.05
Each
Units
SMA Male Straight - 50Ω - - 0 → 4GHz 1W - - - -
RS Stock No. 296-7955
Mfr. Part No.R404111000
BrandRadiall
£8.66
Each
Units
BNC Male Straight - 50Ω Nickel - 4GHz 1W - Brass Gold over Nickel -
RS Stock No. 263-2750
Mfr. Part No.R404131000W
BrandRadiall
£9.20
Each
Units
- Male Straight - 50Ω Nickel - 0 → 4GHz - - Brass Gold over Nickel -
RS Stock No. 263-2766
Mfr. Part No.R404240000
BrandRadiall
£51.39
Each
Units
N Male Straight - 50Ω - - 0 → 12.4GHz 1W - - - -
RS Stock No. 296-7977
Mfr. Part No.R404121000
BrandRadiall
£11.37
Each
Units
TNC Male Straight - 50Ω - - 0 → 4GHz 1W - - - -
RS Stock No. 785-7761
Mfr. Part No.R404012000
BrandRadiall
£5.19
Each
Units
BNC Male Straight Through Hole 75Ω - - 1GHz 1W - Brass Gold -
RS Stock No. 125-0322
Mfr. Part No.R4041D1000
BrandRadiall
£38.97
Each
Units
Coaxial Male Straight - 50Ω Nickel - DC-4GHz 2W Yes Beryllium Copper Gold over Nickel -
RS Stock No. 125-0323
Mfr. Part No.R4041D2000
BrandRadiall
£43.42
Each
Units
Coaxial Male Straight - 50Ω Nickel - DC-4GHz 2W Yes Beryllium Copper Gold over Nickel -
RS Stock No. 125-0325
Mfr. Part No.R404759000
BrandRadiall
£172.38
Each
Units
Coaxial Female Straight - 50Ω Nickel - DC-6GHz 30W Yes Beryllium Copper Gold over Nickel -
RS Stock No. 179-2541
Mfr. Part No.R4041D2121
BrandRadiall
£45.61
Each
Units
- Male Straight - 50Ω Nickel - 4GHz 2W - Beryllium Copper Gold over Nickel -
RS Stock No. 125-0324
Mfr. Part No.R404758000
BrandRadiall
£160.86
Each
Units
Coaxial Male Straight - 50Ω Nickel - DC-6GHz 30W Yes Beryllium Copper Gold over Nickel -
RS Stock No. 179-2540
Mfr. Part No.R4041D1121
BrandRadiall
£42.10
Each
Units
- Male Straight - 50Ω Nickel - 4GHz 2W - Beryllium Copper Gold over Nickel -
RS Stock No. 179-2542
Mfr. Part No.R4041D5000
BrandRadiall
£35.79
Each
Units
- Female Straight - 50Ω Nickel - 6GHz 2W - Beryllium Copper - -