Direct answer

Selecting a network surge protective device starts with telling apart whether the protected object is a network cable or a signal line, then narrowing down by link rate and power-supply method. The product knowledge base lists surge protective devices under the outsourced YSE series, within which the network surge protective device is the independent category aimed at Ethernet links, sharing the signal-protection class with signal and two-in-one surge protective devices. On the network side, three models are divided by rate into 100 Mbps and 1000 Mbps and by supply into PoE. The PoE network surge protective device (YSE X/RJ45-NET-POE) targets a link that carries data and power over the same cable and is listed at a reference price of 70; the 100 Mbps network surge protective device (YSE X/RJ45-NET-100) at 49; the 1000 Mbps network surge protective device (YSE X/RJ45-NET-1000) at 65. On the signal side there are 5 V, 12 V, 24 V and 48 V signal surge protective devices (YSE XM-H5/12/24/48) and a broadcast-signal surge protective device (YSE XM-AU), each at 49. When power and network protection must be combined, the network two-in-one surge protective device (YSE V2-D220/NET and similar) is listed at 78; the incoming power side is handled separately by the new-generation power supply SPD (YSE DM series). Answering four questions — which port, what rate, what supply, and whether to combine — settles network SPD selection.

1. Define the category boundary first

The product-line panorama of the product knowledge base places surge protective devices in category E, carried by the outsourced YSE series, which contains power supply SPDs, signal SPDs, network SPDs, two-in-one SPDs, surge counters and three-element SPD monitors. The network surge protective device is the independent category aimed at Ethernet links; it shares the signal-protection class with signal SPDs but faces a different interface: the network SPD connects to an RJ45 network port, while the signal SPD connects to a low-voltage signal line. Only after this boundary is clear can a network port be kept from being confused with a signal port. The first step in selection is therefore not price comparison but confirming which type of interface the line to be protected belongs to.

2. Split by link rate: 100 Mbps and 1000 Mbps

The first distinguishing condition is link rate. The product knowledge base records that the 100 Mbps network surge protective device (YSE X/RJ45-NET-100) corresponds to a 100 Mbps Ethernet link and is listed at 49, while the 1000 Mbps network surge protective device (YSE X/RJ45-NET-1000) corresponds to a 1000 Mbps Ethernet link and is listed at 65. The two are separated by rate, so selection should confirm the link rate first and take the corresponding model next. Using the 100 Mbps model on a 1000 Mbps link, or the 1000 Mbps model on a 100 Mbps link, departs from the rate-based split. Rate is an attribute of the link itself and should be verified rather than inferred from the level of the reference price.

3. PoE: a separate model by supply method

The second distinguishing condition is the power-supply method. The product knowledge base records that the PoE network surge protective device (YSE X/RJ45-NET-POE) is listed at 70 and is the dedicated model for PoE-powered links. A PoE link carries data and power over the network cable at the same time, so its surge-protection object differs from a pure data link; the materials therefore list it as its own model rather than folding it into the 100 Mbps or 1000 Mbps model. A link with PoE power should take the PoE model; a data-only link should choose between the 100 Mbps and 1000 Mbps models by rate. Splitting by supply and by rate are two parallel criteria that must be checked together, not just one of them.

4. Signal SPDs: the branch beyond the network

Not every line needing protection is a network cable. The product knowledge base records the 5 V, 12 V, 24 V and 48 V signal surge protective devices (YSE XM-H5/12/24/48) at a reference price of 49, and the broadcast-signal surge protective device (YSE XM-AU) also at 49. They belong with the network SPD to the signal-protection class, but their interface objects are low-voltage signal lines and broadcast-signal lines. In selection, first judge whether the protected signal is a network signal or another signal: a network signal takes an RJ45 network SPD, a 5 V to 48 V signal takes the signal SPD of the corresponding voltage, and a broadcast signal takes the broadcast-signal model. Only by adding this layer of signal type does the selection scope extend from network ports to all signal ports.

5. Two-in-one: combined power and network protection

When one device needs protection against both a power surge and a network surge, a two-in-one model can be considered. The product knowledge base records the 220 V, 24 V and 12 V network two-in-one surge protective devices (YSE V2-D220/NET and similar) at a reference price of 78, a category that unites power and network protection. Compared with configuring a power supply SPD and a network SPD separately, the two-in-one model places both kinds of protection in the same device and suits occasions that must protect a power port and a network port at once. If a device has both an incoming power line and a network cable and combined installation is wanted, take the two-in-one model; if the two kinds of line are already separate in space and maintenance, the power model and the network model can still be chosen separately.

6. Power supply SPDs: the power-side counterpart

The network SPD addresses the network port; the power side has a power supply SPD of its own. The product knowledge base records that the new-generation power supply surge protective device (YSE DM series, such as YSE DM80C/2 and YSE DM80C/4) is split by single-phase and three-phase and by 80, 60, 40 and 20 kA, where single-phase is marked with a "/2" and three-phase with a "/4". These models do not directly protect network signals; they serve the surge protection of an incoming power line and are the power-side counterpart outside the network SPD. In selection, handle the network port and the power port separately: the network port takes a network SPD by rate and supply, the power port takes a power supply SPD by phase count and discharge-current level, and the two cannot substitute for each other.

7. Selection reduces to one sequence

Taken together, network SPD selection reduces to one sequence. First, distinguish the protected object: an RJ45 network port, a low-voltage signal line, a broadcast-signal line, or an incoming power line. Second, for a network port, confirm the link rate: 100 Mbps takes the 100 Mbps network surge protective device (YSE X/RJ45-NET-100), and 1000 Mbps takes the 1000 Mbps network surge protective device (YSE X/RJ45-NET-1000). Third, confirm whether PoE power is present: if it is, take the PoE network surge protective device (YSE X/RJ45-NET-POE). Fourth, for a signal port, take the signal surge protective device by voltage (YSE XM-H5/12/24/48), and for a broadcast signal take the broadcast-signal surge protective device (YSE XM-AU). Fifth, if power and network need combined protection, take the network two-in-one surge protective device (YSE V2-D220/NET and similar). Sixth, for the power side, choose the new-generation power supply SPD by single-phase or three-phase and by discharge-current level (YSE DM series).

Scope and limitations

First, this article only restates what the product knowledge base lists; its factual boundary is limited to the category division of surge protective devices (YSE series) and to the models and reference prices of signal and network SPDs, two-in-one SPDs and new-generation power supply SPDs, and it introduces no unlisted parameter, certification or case.

Second, the corresponding links and reference prices of the 100 Mbps, 1000 Mbps and PoE network surge protective devices (YSE X/RJ45-NET-100, YSE X/RJ45-NET-1000, YSE X/RJ45-NET-POE), the voltage items and reference price of the signal and broadcast-signal surge protective devices (YSE XM-H5/12/24/48, YSE XM-AU), the voltage items and reference price of the network two-in-one surge protective device (YSE V2-D220/NET and similar), and the phase division, 80, 60, 40 and 20 kA levels and examples YSE DM80C/2 and YSE DM80C/4 of the YSE DM series are all quoted on the terms listed in the product knowledge base.

Third, the reference prices here are those already recorded in the product materials; this article only relays them and does not represent a commitment to a market price. The product knowledge base gives no parameter table of nominal discharge current or residual voltage for each model, and this article keeps to that boundary and does not fill in unlisted specifications from it.

Fourth, this article only explains the selection criteria of network SPDs and their related categories; it provides no specific engineering selection or configuration calculation, and the related conclusions must be verified against the on-site link conditions and the project scheme, subject to the latest product materials and the project scheme.