Cable length
The length of the cable used to connect the surge protector to the network.
The longer the cable, the farther from the outlet you can install the device. On the other hand, a long cable can be inconvenient over short distances. Models on a coil are deprived of this drawback (see "Type"), this moment is compensated by the actual presence of the coil, but they differ in large dimensions and heavy weight. So when choosing, it is far from always worth chasing the maximum length of the wire.
Max. energy absorption
The maximum energy absorption provided by the mains filter, namely, the maximum pulse energy at which the device can safely absorb and dissipate it, completely protecting the connected load. The higher this indicator, the more reliable the filter, the more powerful power surges it can handle. In inexpensive models, the maximum absorption is calculated in tens of joules, in the most advanced models it can exceed 1000 J and even 2000 J.
Grounded sockets (type F)
The number of
sockets with type F grounding, provided in the design of the mains filter.
In this case, we are talking about full-size European type F sockets with metal ground clamps on both sides at the edges of the socket. The "socket" in this case means a CEE 7/4 ("Schuko") standard plug. Grounding is required for the safe operation of some types of electrical appliances, in particular, washing machines and other machines that work with water, refrigerators, computers, audio equipment, etc. A detailed list can be found in the reference literature. If you plan to connect such devices through the filter, this filter must have sockets with grounding.
Phone jacks
The number of
telephone jacks provided in the design of the filter.
The presence of such connectors means that the filter can also be used to protect the communication line from various interference. Such protection is especially important when sending faxes and connecting to the Internet over a telephone line — these types of communications are quite susceptible to interference. The minimum number of telephone jacks, if any, is 2, input and output. Many filters with this function have 3 connectors — an input and 2 outputs (to the phone and to the computer); There are more, but extremely rare.
Coaxial connectors
The number of coaxial connectors provided in the extension cord. If this is a traditional antenna signal, then only 1 connector is provided at each end of the extension cord (mother or father). If we are talking about connecting multimedia devices using an RCA connection, then there can be 2 or 3 connectors on each side of the cable.
USB A
The number of
USB ports for charging, provided in the design of the surge protector.
Such ports do not perform any other function than powering and charging external devices such as smartphones or tablets. The presence of such connectors in the surge protector can be especially convenient when there is no “230-to-USB” adapter at hand, and there are few USB ports in a computer or laptop and using them for charging is “an unaffordable luxury”.
Max. charging current
The current output by a USB connector when a charging gadget is connected to it.
The higher the current, the faster the battery can charge. However, when choosing, note that in order to use a high current strength, the connected device must also support it. Basically there are
USB with a current strength of 2.1 A,
2.4 A and
3 A.
It is also worth noting that when using several USB ports at the same time, the current strength is significantly reduced.
Power (with 1 device)
The maximum power that a USB port can produce when connecting only one gadget.
Higher power output speeds up the charging process. At the same time, there are a number of nuances associated with this parameter. Firstly, the appropriate power must be supported not only by the port, but also by the gadget being charged - otherwise the speed of the process will be limited by the characteristics of the gadget. Secondly, to take full advantage of the capabilities, you may need to support not only the appropriate charging power, but also a specific fast charging technology. Thirdly, in filters with several charging connectors, the maximum power per device can only be achieved if the other ports are not used.
