Manufacturer product photo · 4×GE PoE + 2×SFP
S4G02GFI-SFP
Atlas · Unmanaged PoE · 4-Port Family
4-Port Gigabit PoE Switch · 2 × 1000M SFP Fibre Uplinks · 52 W · Fanless
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◆IEEE802.3af/at PoE
◆30W per Port
◆250m Extend Mode
◆Fanless & Silent
◆IP30 Metal Housing
◆-10~70°C Commercial Grade
Overview
The S4G02GFI-SFP is the fibre-uplink member of the 4-port PoE family: four 10/100/1000M PoE ports for cameras, access points or intercoms, and two 1000M SFP slots instead of copper uplinks. Copper tops out at 100 m per segment, so when the switch sits at a gate house, a pump station or the far end of a yard while the recorder is in the office block, the SFP pair carries the traffic over fibre — single-mode modules cover tens of kilometres. Total PoE budget is 52 W with 30 W available on any single port, the housing is fanless metal, and the unit is unmanaged: power it, plug in, done.
Is This the Right Fit?
Six real deployment scenarios matched to this model's actual datasheet specifications.
Small retail shop or convenience store with a handful of cameras4 PoE ports cover a typical 3-4 camera storefront, and the 2 uplink ports connect straight to an NVR or router — no separate PoE injector or extra power run needed.
Home or small residential monitoringA compact desktop unit that sits behind a router without extra noise or heat — enough ports for a front door, driveway, backyard and side gate camera.
Small guesthouse or single-floor B&BCovers hallway and entrance cameras on one switch without running a separate power outlet to each camera location — useful where wiring an extra socket means breaking into finished walls.
Budget-conscious retrofit of an existing 100M camera networkWhere the existing cameras and cabling are already Fast Ethernet, this model matches the network speed at the lowest cost per port instead of paying for gigabit capacity that will not be used.
Detached garage, workshop or small storage roomA rugged metal, fanless build tolerates dust and temperature swings in an unheated outbuilding, while still being small enough to tuck onto a shelf or wall bracket.
Gate booth or entrance camera 200+ meters from the equipment roomExtend mode pushes the PoE and data run to 250m on copper, covering a distant gate or car park entrance that standard 100m Ethernet cannot reach without adding a repeater.
Not a good fit if:
- Unmanaged Layer 2 only — no VLAN segmentation or STP/RSTP; choose a managed switch if network isolation or spanning tree is required.
- No ring/loop redundancy protocol — wire in star, tree or bus topology only; do not create physical wiring loops between ports.
- Commercial-grade -10 to +70°C housing in a compact desktop/wall-mount form factor — not rated for industrial wide-temperature extremes and not rack-mountable without accessories.
Key Features
- 4 x 10/100M PoE ports, IEEE802.3af/at, up to 30W per port with smart PD detection
- 2 x 10/100M uplink ports to NVR or router
- Extend mode: PoE + data reach up to 250m (link rate steps down to 10Mbps)
- No extra power cable to the camera — PoE carries power and data on one cable, cutting install cost
- Fanless metal housing — silent operation, no moving parts to fail
- Built-in watchdog auto-reset keeps the switch stable under heavy camera loads
- Store-and-forward switching with flow control, auto-negotiation and auto MDI/MDIX
Specifications
IEEE Standards
| IEEE802.3 | 10Base-T Ethernet |
| IEEE802.3u | 100Base-TX Fast Ethernet |
| IEEE802.3x | Flow Control |
| IEEE802.3af | PoE |
| IEEE802.3at | PoE+ |
Switching
| Switching Capacity | 16 Gbps |
| Forwarding Rate | 11.904 Mpps |
| MAC Address Table | 4K |
| Flow Control | Supported (IEEE 802.3x) |
| Auto MDI/MDI-X | Supported |
Interfaces
| PoE Ports | 4 × 10/100/1000Base-T (RJ45), IEEE 802.3af/at |
| Uplink | 2 × 1000Base-X SFP slots (modules ordered separately) |
| Fibre Reach | Depends on SFP module — multimode ~550 m, single-mode 20 / 40 / 60 / 120 km options |
| Switching Mode | Store-and-forward |
| LED Indicators | PWR (power), red (PoE status), blue (link/activity) |
PoE
| PoE Standard | IEEE802.3af / IEEE802.3at |
| PoE Ports | 4 |
| Max Power per Port | 30W |
| Powered Device Detection | Automatic, smart detection — will not damage non-PoE devices |
| PoE Mode | Mode A (power over data pairs) |
| Cable Distance | Standard 100 m per copper segment; use the SFP uplinks for longer runs |
Power
| Input Voltage | AC 100–240 V |
| Power Supply | Built-in power supply, DC 52V 1A |
| Total Power Consumption | < 52 W at full load |
| Protection | Reverse-polarity and overload protection |
Physical
| Dimensions | 145.8 × 114.2 × 36 mm (excluding protrusions) |
| Housing | Metal, fanless |
| Cooling | Fanless (0 fans) |
| Protection Rating | IP30 |
| Mounting | Desktop or wall-mount |
Environment
| Operating / Storage Temperature | -10°C ~ +70°C |
| Humidity | 5%–95% RH, non-condensing |
| Protection Rating | IP30 |
| MTBF | 50,000 hours (manufacturer figure) |
Package
| Units per Carton | 50 units/carton |
| Packing Dimensions | 195 × 164 × 44 mm |
| Unit Weight | 0.6 kg per unit |
| Box Contents | Switch × 1, power cord × 1, manual × 1, certificate × 1, warranty card × 1 |
Models & Ordering
| Model | Product Description | Price |
|---|---|---|
| S4G02GFI-SFP | 4 × 10/100/1000M PoE ports (IEEE 802.3af/at, 30 W per port) + 2 × 1000M SFP fibre uplink slots. 52 W total PoE budget, switching capacity 16 Gbps, MAC table 4K, 145.8 × 114.2 × 36 mm, built-in DC 52V 1A supply. SFP modules are ordered separately to match fibre type and distance. | Get Quote |
Single model, single 52 W PoE budget. It shares housing and PoE behaviour with the copper S4G02GI; the difference is the uplink — two 1000M SFP fibre slots instead of two copper Gigabit ports. Choose this version when the run back to the recorder or router is longer than 100 m.
Dimensions
unit: mm
Your Brand. Factory-Direct Supply.Neutral casing, ready for your logo · Custom port/power options · Small batches welcome.
Custom & OEM →Who uses it, where it goes and how to install it
Written for the S4G02GFI-SFP from its own specifications: 4 × 10/100/1000M PoE ports, 2 × 1000M SFP fibre uplinks, 52 W PoE budget, 30 W per port, fanless IP30 metal case.
Who it is for
- Installers with a camera point beyond 100 m — A gate house, pump station or far corner of a yard with up to 4 cameras: the switch powers them locally and sends the video back over fibre, where copper would stop at 100 m.
- Integrators linking several small buildings — With 2 SFP slots, one fibre comes in from the office and the second continues to the next building, so farms, schools or warehouses can be chained without a separate fibre switch at each stop.
- Sites with lightning or long outdoor links — Fibre carries no electricity, so the building-to-building link cannot bring a surge or ground-potential difference into the recorder room the way a long copper run can.
- Distributors wanting their own brand — The S4G02GFI-SFP is an Atlas factory-direct model: neutral casing ready for your logo, custom port/power options and small batches, as stated on this page.
Where and how to install
- Indoor or in a sealed cabinet — The case is IP30: fine on a desk, shelf or wall indoors, but outdoors it must go inside a weatherproof cabinet. At 145.8 × 114.2 × 36 mm it fits small pole or wall boxes; leave room for the fibre bend and the LC patch leads.
- Heat, sun and condensation — It is fanless and rated -10 to +70°C, 5–95% RH non-condensing. A metal box in full sun runs far hotter than the air, so shade it, vent it and keep it away from the power supply; in humid sites add a breather or desiccant so water does not condense on the board.
- Fibre side — SFP modules are ordered separately: choose multimode for up to ~550 m or single-mode for the 20 / 40 / 60 / 120 km options, and the module at the far end must match. Terminate the cable in a small fibre box, keep dust caps on unused ports and do not bend patch leads tightly.
- Camera side: copper runs — Keep each camera run to 100 m of solid-copper Cat5e or Cat6; copper-clad aluminium cable drops voltage and can leave a camera unpowered. Put outdoor cable joints in a junction box.
- Surge, earthing and mains power — No surge rating is listed, so on pole cameras or long outdoor copper runs fit Ethernet surge protectors and earth the cabinet. The input is AC 100–240 V, so it runs directly on 110/127 V or 220/240 V mains, and a small UPS keeps the remote point recording through outages.
PoE budget: how many cameras
52 W is shared by the 4 ports and any single port can take up to 30 W. Four ordinary IR cameras use less than half of it; the limit appears with PTZ or heavy-IR cameras. The built-in supply is DC 52V 1A, so plan to leave some reserve rather than load the full 52 W.
| S4G02GFI-SFP | |
|---|---|
| PoE ports / uplinks | 4 × 10/100/1000M PoE / 2 × 1000M SFP |
| Total PoE budget | 52 W |
| Max. power on one port | 30 W |
| Fixed IR cameras at 6 W each | 4 (24 W) |
| Small PTZ / heavy-IR cameras at 13 W, keeping 20% reserve | 3 (39 W) |
| 30 W devices at full load | 1 (+ 22 W) |
| Mixed example | 1 × 13 W + 3 × 6 W = 31 W |
| Copper cable per port | 100 m |
| Uplink to NVR / core | SFP: ~550 m MM / 20–120 km SM |
| Operating temperature | -10 ~ +70°C |
- Pick the S4G02GFI-SFP when the 4 cameras are more than 100 m from the recorder: fibre replaces the long copper run.
- If the recorder is within 100 m, the copper-uplink S4G02GI does the same job without SFP modules.
- More than 4 cameras at the remote point: step up to the S802GIGFI (8 PoE + 1 SFP) or S8G02G2GFI (8 PoE + 2 SFP).
Camera counts assume typical draws of 6 W (fixed IR camera) and 13 W (small PTZ or heavy-IR camera); check the maximum power on each camera's own datasheet. Fibre reach depends on the SFP module.
4-Port Gigabit PoE Switch FAQ — S4G02GFI-SFP
How many cameras can the S4G02GFI-SFP power?
Four devices on the gigabit PoE ports — cameras, access points or intercoms. The 52 W full-load budget averages 13 W each, comfortably above the 4–12 W a typical IP camera draws, and any single port can supply up to 30 W under IEEE 802.3af/at for a PTZ at the gate.
How far can the fiber uplinks reach?
It depends on the SFP module you fit (ordered separately): multimode covers about 550 m, while single-mode options run 20, 40, 60 or 120 km. Both 1000Base-X slots are available, so you can link a gate house to the office block and still keep a second fiber path.
When should I pick this model over a copper-uplink switch?
Whenever the switch sits far from the recorder: copper tops out at 100 m per segment, so at a gate house, pump station or the far end of a yard, the SFP pair carries the traffic over fiber instead. The four 10/100/1000 M PoE ports serve the local cameras while fiber does the backhaul.
Does it need any configuration to start working?
None — it is unmanaged: power it, plug in, done. Auto-negotiation and auto MDI/MDI-X sort out speeds and cable order, store-and-forward switching moves 16 Gbps with 11.904 Mpps forwarding and a 4K MAC table, and smart PD detection means non-PoE devices on the PoE ports are never harmed.
What about housing, power input and operating conditions?
A fanless IP30 metal case of 145.8 × 114.2 × 36 mm, 0.6 kg, for desktop or wall mounting. The built-in DC 52 V 1 A supply takes AC 100–240 V with reverse-polarity and overload protection. Operation runs −10 °C to +70 °C at 5–95 % humidity; quoted MTBF is 50,000 hours.
Which SFP modules do I need for the S4G02GFI-SFP, and what goes at the other end of the fibre?
Use 1000M (1000Base-X) SFP modules, ordered separately: multimode for runs up to about 550 m, single-mode for 20, 40, 60 or 120 km. Both ends must use the same fibre type and matching modules; with single-fibre BiDi modules you need a matched A/B pair. Most NVRs only have RJ45, so at the recorder end put a switch with an SFP slot (for example our S802GIGFI or S8G02G2GFI) or a fibre media converter. Tell us the distance and fibre type and we will quote the right pair.
The S4G02GFI-SFP has no copper uplink: how do I connect a local NVR, router or laptop?
Plug it into any of the 4 gigabit RJ45 ports. PoE detection is automatic, so a non-PoE device such as an NVR, router or laptop is not powered and not damaged. That port is then not available for a camera, so a site with a local recorder plus 4 cameras needs the 8-port S802GIGFI instead.
Is the 52 W on the S4G02GFI-SFP per port or shared, and can it run a 30 W PTZ?
Shared: 52 W is the total for all 4 ports, and any single port can give up to 30 W. One 30 W PTZ therefore leaves about 22 W, enough for 3 fixed cameras at 6 W (18 W) but not for more PTZs. Because the internal supply is DC 52V 1A, keep total camera load comfortably under 52 W, especially in a hot cabinet.
Does the S4G02GFI-SFP have the 250 m extend mode for a camera beyond 100 m?
This page lists 250 m extend mode among the features, but the specification table gives 100 m per copper segment and points to the SFP uplinks for longer runs, so confirm with us for your order. Where extend mode is available, the port drops to 10 Mbps, which suits one camera at a moderate bitrate but not a high-bitrate 4K stream. For a camera far from the switch, the cleaner design is to put the switch near the cameras and run fibre back.
Can I chain several buildings with the two SFP slots of the S4G02GFI-SFP?
Yes, in a line or tree: fibre from the office into SFP 1, then SFP 2 on to the next building's switch, and so on. The switch is unmanaged with no STP or ring protocol, so never connect the last building back to the office as well; that closed loop floods the network. Each 1000M fibre link is shared by every camera behind it, which is ample for a few dozen typical camera streams.
Will the S4G02GFI-SFP power Hikvision, Dahua, Uniview or other brands of IP camera?
Yes, any camera, access point or intercom that follows IEEE 802.3af or 802.3at. The switch supplies power in Mode A (on the data pairs), which standard PoE devices accept. Passive 24 V PoE devices are not 802.3af/at and will not be powered; the switch is unmanaged, so it does not affect which NVR or app you use.
Ordering questions — samples, shipping, payment, lead time and genuine stock — are answered once on our FAQ page.
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