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6-Port Gigabit PoE Switch
6-Port Gigabit PoE Switch - Image 2
6-Port Gigabit PoE Switch - Image 3
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6-Port Gigabit PoE Switch

HD-U890-4G2G-48

● 4×10/100/1000Mbps PoE Ports & 2 Gigabit Ports
● 100-240V AC 50/60Hz
● Standard PSE Chip
● AI/Watchdog function
● Network Port Support 6KV Common Mode & 6KV Differencial Mode Surge Protection
● Power Board Support 6KV Common Mode & 2KV Differencial Mode Surge Protection

Download the datasheet

Why You Want It

IEEE802.3af/at

Compliant with both IEEE802.3af (PoE) and IEEE802.3at (PoE+) standards, and meets IEEE 802.3, 802.3u, 802.3x, 802.3ab standards for reliable performance.

Class A EMI/EMC Compliant

Certified to Class A industrial standard for EMI/EMC. Delivers strong resistance to electromagnetic interference.

6KV Surge Protection

6KV Common Mode & 6KV Differential Mode surge protection (RJ45 port)； 6KV Common Mode & 2KV Differential Mode surge protection (power board).

Standard PSE Chip

Standard PSE chip, smart power matching, compatible with all af/at devices – safe and reliable.

3 Modes + Watchdog

Normal（Standard switching, 100m）; VLAN(Port isolation, prevents broadcast storms); Extend(10Mbps, up to 250m,supported on ports 3-4); Watchdog(Auto‑reboots faulty devices, lowers maintenance).

Plug-and-play

Simply connect the cable and power on – no configuration required, auto-detection works instantly.

4 x Gigabit PoE ports + 2 x Gigabit uplink ports

● Equipped with 4 x Gigabit PoE ports (30W per port, 48W total budget) and 2 x Gigabit uplink ports. Delivers 12Gbps switching capacity and 1.488Mpps/port packet forwarding rate.
● Built with standard PSE chip, Class A EMI/EMC compliant, and 6KV dual surge protection. Supports 3 operating modes (Normal / VLAN / Extend) + AI Watchdog.
● Note：Extend mode is supported on ports 3-4 only (up to 250m/10Mbps); ports 1-2 operate in standard Gigabit mode (100m).
4-port Gigabit PoE switch with 2 Gigabit uplink ports, 48W PoE budget, 12Gbps switching capacity, AI Watchdog, VLAN Extend modes, and 6KV surge protection.

Standard PSE Chip – Safe & Reliable

Adopts IEEE standard PSE chip, fully compliant with PoE protocol. Intelligently detects connected devices and delivers precise power matching. Eliminates compatibility issues of non-standard chips. No risk of burning powered devices – safe, reliable, plug-and-play.
4-port Gigabit PoE switch with standard IEEE PSE chip, smart PD detection, precise power matching, IEEE 802.3af/at compliance, and safe plug-and-play PoE power delivery.

6KV Dual Surge Protection

● RJ45 port: 6KV Common Mode + 6KV Differential Mode.
● Power board: 6KV Common Mode + 2KV Differential Mode.
● Plus ESD protection: air 15KV / contact 8KV. Effectively protects against lightning strikes, grid fluctuations, and ESD events – ensures stable operation in harsh environments.
4-port Gigabit PoE switch with 6KV dual surge protection, RJ45 6KV common and differential mode protection, power board surge defense, and 15KV air 8KV contact ESD protection.

Specification

ModelHD-U890-4G2G-48
ProductPoE Switch with Standard PSE Chip
Ports
Network Port6
PoE Port4, 1000Mbps;  RJ45 ports; Max. 30W Output of Single PoE Port

Transmission distance:0~100m or 0~250m selected by switch

Uplink Port2, 1000Mbps; Transmission Distance: Defaulf: 0-100m
PWR(Power supply Indicator)Light on: Powering
Light off: No Power
Mode(Slide Switch)Green light off: Normal/Default mode
Green light on: VLAN mode
Green ligh flash: Extend mode
1-6 IndicatorGreen light off:  Link is disconnected
Green light on:  Link is connected
Green light flash: Data Transmitting
Standard
Network ProtocolIEEE 802.3,IEEE 802.3u,IEEE 802.3ab,IEEE802.3x
Performance
Switching Capacity12Gbps Full duplex
Packet Forwarding Rate1.488Mpps/port
Forwarding ModeStore-and-forward
Packet Buffer1Mb
MAC Address Table2K
VlanSupport
WatchdogSupport
Power Over Ethernet
PoE StandardIEEE802.3af, IEEE802.3at
PoE Power Supply1/2(+),3/6(-)
Transmission Distance0-100m/1000Mbps or Port 3-4 Max. 250m/10Mbps via Cat.5e or more under Extend mode
PoE FeatureAll ports support MDI/MDIX
General
Power SourceBult-in Power Supply
Input: 100-240VAC, 50/60Hz
PoE Power Budget48W
Power Consumption<5W
ESDAir discharge: 15KV
Contact discharge: 8KV
Surge Protecton-RJ45 PortCommon mode:  6KV
Differential mode/PoE :  6KV
Differential mode/Signal:  6KV
Surge Protecton-Power SupplyCommon mode: 6KV
Differential mode: 2KV
Working Temperature-10℃-50℃
Humidity10%-90% , non-condensing
Storage Temperature-40℃-70℃
ColorBlack
Weight0.56kg(not include input cable & packaging)
Dimension(L×W×H)200*118*44mm

Dimensions (mm)

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