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. 718-2512
Mfr. Part No.1-1337523-0
$6.35
Each
units
BNC Male Straight - 50Ω - - 0 → 1GHz 0.5W - - - -
RS Stock No. 296-7955
Mfr. Part No.R404111000
BrandRadiall
$23.80
Each
units
BNC Male Straight - 50Ω Nickel - 4GHz 1W - Brass Gold over Nickel -
RS Stock No. 712-3282
Mfr. Part No.J01152A0011
$35.56
Each
units
SMA Male Straight - 50Ω Copper Nickel Gold Alloy - 0 → 6GHz 1W - Brass Copper, Gold Alloy, Nickel -
RS Stock No. 456-453
Mfr. Part No.1400895-1
$1.962
Each (In a Pack of 10)
units
BNC Plug to BNC Socket - - Panel Mount - - - - - - Brass Silver -
RS Stock No. 112-3665
Mfr. Part No.80.5420.017
BrandIMS
$9.96
Each
units
- - Right Angle PCB Mount - - - - - - - - -
RS Stock No. 716-5056
Mfr. Part No.65_QLA-01-0-1/122_NE
$53.93
Each
units
QLA Male Straight - - Nickel - 0 → 1.4GHz 0.5W - Brass Gold over Nickel -
RS Stock No. 494-739
Mfr. Part No.65_SMA-50-0-1/111_NE
$39.71
Each
units
SMA Male Straight - 50Ω Gold over Nickel - 0 → 18GHz 1W Yes Brass Gold over Nickel -
RS Stock No. 404-5394
Mfr. Part No.090-0520
BrandYuetsu
$32.72
Each
units
BNC Plug to BNC Socket - Straight Cable Mount 75Ω - - 0 → 0.6GHz 0.5W - Brass Gold -
RS Stock No. 404-5580
Mfr. Part No.090-0210
BrandYuetsu
$41.49
Each
units
- Male Straight - 50Ω - - 0 → 4GHz 1W - Brass Gold -
RS Stock No. 125-0325
Mfr. Part No.R404759000
BrandRadiall
$311.73
Each
units
Coaxial Female Straight - 50Ω Nickel - DC-6GHz 30W Yes Beryllium Copper Gold over Nickel -
RS Stock No. 716-5012
Mfr. Part No.6550.17.AA
$358.51
Each
units
N Male Straight - 50Ω Anodized - 0 → 5GHz 25W - Brass Gold -
RS Stock No. 125-0323
Mfr. Part No.R4041D2000
BrandRadiall
$85.33
Each
units
Coaxial Male Straight - 50Ω Nickel - DC-4GHz 2W Yes Beryllium Copper Gold over Nickel -
RS Stock No. 716-5019
Mfr. Part No.65_N-50-0-51/113_NE
$25.82
Each
units
N Male Straight - 50Ω White Bronze - 0 → 6GHz 1W - Brass White Bronze -
RS Stock No. 700-9316
Mfr. Part No.B1004A1-ND3G-75R-0.01-1W
BrandAmphenol
$3.64
Each
units
BNC Male Straight - 75Ω Nickel over Copper - - - - Brass Gold over Nickel -
RS Stock No. 738-7515
Mfr. Part No.H01000A0087
$13.12
Each
units
Cable Female, Male Straight PCB Mount - - - 0 → 4GHz - - Brass Gold -
RS Stock No. 296-7977
Mfr. Part No.R404121000
BrandRadiall
$18.32
Each
units
TNC Male Straight - 50Ω - - 0 → 4GHz 1W - - - -
RS Stock No. 112-3671
Mfr. Part No.80.5420.027
BrandIMS
$10.57
Each
units
- - Right Angle PCB Mount - - - - - - - - -
RS Stock No. 112-3154
Mfr. Part No.J01006A1269
$10.79
Each
units
BNC Male Straight - 75Ω - - - 0.5W - - - -
RS Stock No. 716-5022
Mfr. Part No.6560.41.AA
$524.70
Each
units
7/16 Male Straight - 50Ω Anodized - 0 → 5GHz 60W - Brass Silver -
RS Stock No. 179-2540
Mfr. Part No.R4041D1121
BrandRadiall
$62.72
Each
units
- Male Straight - 50Ω Nickel - 4GHz 2W - Beryllium Copper Gold over Nickel -
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