ASUS RT-AC51U

20Ratings
Test reportsGood based on 2 tests
Currently out of stock

Product details

The ASUS RT-AC51U dual-band AC750 WLAN router offers both fast WLAN speed and excellent value for money to upgrade your home network to the latest 802.11ac WLAN technology. Experience simultaneous dual-band
connectivity and enjoy speeds of 300 Mbps on the 2.4 GHz frequency and up to 433 Mbps in the 5 GHz band. Thanks to its multi-purpose USB port, RT-AC51U is much more than just a router. Plug in a USB hard disk drive and you have an instant file server - and one that extends into the cloud via ASUS AiCloud. Alternatively, you can connect a USB printer to RT-AC51U to create a print server to share a device with multiple users. The USB port even has room for mobile 3G / 4G broadband dongles for two broadband connections (WAN) on a router, so you never have to worry about your Internet access going down again. The port can even be used to power devices like smartphones and tablets, making it a convenient charging station. ASUSWRT's user-friendly graphical user interface unleashes the power of the RT-AC51U and provides robust control to optimize your network for you. With 30-second setup and easy traffic management, even network novices can take advantage of its sophisticated features, while power users will love the IPv6 support, multiple wireless SSIDs and encrypted VPN access.

Key specifications

Router type
4G router, 
Wi-Fi router
Number of ports
4 ports
Network connections
RJ45 (1x)
Wi-Fi standard
Wi-Fi 1 / 802.11b, 
Wi-Fi 2 / 802.11a, 
Wi-Fi 3 / 802.11g, 
Wi-Fi 4 / 802.11n, 
Wi-Fi 5 / 802.11ac
Router functions
Firewall, 
Quality of Service (QoS), 
VPN
5 GHz transfer rate
433 Mbit/s
2.4 GHz transfer rate
300 Mbit/s
Item number
10144235

General information

Manufacturer
ASUS
Category
Routers
Manufacturer no.
90IG0150-BM3G00
Release date
4.2.2015

Colour

Colour group
Black
Exact colour description
Black

Router properties

Router type
4G router, 
Wi-Fi router
Router functions
Firewall, 
Quality of Service (QoS), 
VPN
VPN support
IPSec, 
L2TP, 
OpenVPN, 
PPTP

Wi-Fi

Wi-Fi standard
Wi-Fi 1 / 802.11b, 
Wi-Fi 2 / 802.11a, 
Wi-Fi 3 / 802.11g, 
Wi-Fi 4 / 802.11n, 
Wi-Fi 5 / 802.11ac
Wi-Fi frequency band
Dual band
Wi-Fi encryption
WPA-EAP, 
WPA-PSK, 
WPA2-EAP, 
WPA2-PSK
WLAN functions
Guest access, 
Multi-User MIMO, 
WPS (WiFi Protected Setup)
Number of antennas
3 x
5 GHz transfer rate
433 Mbit/s
2.4 GHz transfer rate
300 Mbit/s

Mobile internet properties

Mobile phone standard
4G

Network interface

Number of ports
4 ports
Network connections
RJ45 (1x)
Max. port speed
100 Mbit/s

Mesh networking properties

Mesh networking type
Mesh satellite

Scope of delivery

Scope of delivery
RJ-45 Cable

Product dimensions

Length
12.90 cm
Width
18.90 cm
Height
3.60 cm
Weight
270 g

Package dimensions

Length
28.20 cm
Width
5.80 cm
Height
21.20 cm
Weight
604 g

Reviews & Ratings

Statutory warranty score

How often does a product of this brand in the «Routers» category have a defect within the first 24 months?

Source: Galaxus
  • 9.Teltonika
  • 13.AVM
  • 14.ASUS
  • 14.Synology
  • 16.MikroTik

Statutory warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Galaxus
  • 12.Zyxel
  • 16.Synology
  • 17.Acer
  • 18.ASUS
  • 19.Telekom

Return rate

How often is a product of this brand in the «Routers» category returned?

Source: Galaxus
  • 14.Google
  • 14.Synology
  • 16.ASUS
  • 17.Acer
  • 18.Huawei
Source: Galaxus

Translation: machine translated
Overall ratingGood76/100
Satisfying56/100Rank 10 out of 11
CHIP OnlineWLAN-ac-Router bis 99 Euro im Test: Günstiger TopspeedReleaseSeptember 2015

The overall conclusion for this router is adequate, but there are clearly better alternatives in the price range up to 99 euros in this comparison test. The price of the Asus RT-AC51U is around 40 euros, which is a very fair price considering its performance. However, you should not expect too much in terms of pure performance, especially since the equipment is also below average...

Very good95/100Rank 1 out of 8
Guter Rat Logo
Guter RatReleaseApril 2015
  • PositiveStatus display
  • Positivevery good help texts
  • Positiveexcellent user guidance
  • NegativeRange in the 5 GHz range below average

The test winner is characterised by a very simple installation, which even non-professionals should not have any problems with. Unfortunately, the range of the router is not very high, so you should carefully choose the place where it is installed. However, the model works very reliably and can be configured very easily using a browser...