Advantech BB-UHR401

Ruggedised USB Isolator

  • 4 kV Isolation
  • High Retention USB Connectors
  • ESD Protection – 15 kV Air
  • Heavy Duty Case – Panel Mount or optional DIN rail adaptor clips
  • USB 2.0 – Full Speed
  • One and Two Port Version


The UHR401 and UHR402 are One and Two Port Ruggedized Isolators. They are designed and tested to meet heavy industrial EMC standards. High retention USB connectors hold standard USB cables tight and are perfect for high vibration applications – requiring up to 3.2 lbs-force to disconnect them. They have 4 kV Isolation between the upstream and downstream USB ports to protect expensive equipment from dangerous ground loops and to help ensure data integrity.

The Heavy Industrial EMC specifications allow these isolators to operate in unfriendly electrical environments – such as near variable frequency drives, motor control centers, welding, and other large electrical loads.

They are powered from an external 10 to 30 VDC power supply unit. The product comes with an international power supply that has US, EU, and UK blades.

The downstream port(s) provides up to 500 mA of power to connected USB devices.

Part Number Description
BB-UHR401 1 Port Rugged USB Isolator
BB-UHR402 2 Port Rugged USB Isolator
USB Interface
Standards USB 1.1 & 2.0 (12 Mbps)
Upstream Port (1) Type B Female – High Retention
Downstream Port (1 or 2) Type A Female – High Retention
Speed 12 Mbps Multi-transaction Translator, 1 per port
Isolation 4 kV – Upstream to Downstream
ESD 15 kV Air, 8 kV Contact
High Retention USB Ports require 15 N (3.2 lbs-force) withdrawal force using standard USB Cable
USB Ports High Retention USB Type B (Upstream) , Type A (Downstream), Minimum withdrawal force of 15 Newtons (~3.4 lbs-force)
LED Indicators Power from USB bus
Source External
Power Connector Threaded barrel jack
Input Voltage 10 to 30 VDC
PSU Input :110 – 240 VAC, 50 / 60 Hz
US, EU, UK Blades Included
Output: 12 VDC
Barrel Jack Barrel Jack, Center Positive
Power UHR401 – 4 Watts (External Source)
UHR402 – 7 Watts (External Source)
Locking / Threaded, Center Positive
Downstream Power 500 mA per port
Power Green LED
Port Ready Green LED
Dimensions 7.9 x 5.4 x 2.7 cm (3.1 x 2.1 x 1.1 in)
Enclosure IP 30, Plastic
Weight 0.15 lbs (80 g)
MTBF UHR401 375842 Hours
MTBF UHR402 353807 Hours
MTBF Calc. Method MIL 217F Parts Count Reliability
Operating Temperature 0 to 50°
Storage Temperature -40 to 85°C
Operating Humidity 0 to 95% Non-condensing
Approvals / Certifications
Emissions FCC Class B, CISPR Class B (EN55022)
CE EN61000-6-2:2005 (Heavy Industrial)
EN61000-4-2:2008 (ESD) +/- 8kV contact, +/-15 kV air
EN61000-4-3:2006 (RI) 10 V/m, 80-1000 Mhz; 3 V/m 1.3 to 2.7 GHz
EN61000-4-4:2004 (EFT Burst) +/- 2kV DC ports; +/- 1 kV signal ports
EN61000-4-5:2005 (Surge) +/- 2 kV com; +/- 1 kV differential
EN61000-4-6:2008 (CI) 10 Vrms, 0.15 to 80 MHz
EN61000-4-8:2001 (Magnetic) 10 A/m, 50 Hz & 60 Hz

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