PassMark Software

USB Short Circuit Testers

USB Short Circuit Tester for USB ports

Also known as USB SOS (Short Circuit, Over Voltage, Sensor)

USB Short Circuit Testers are one of the quickest and easiest ways to check port voltage and short circuit in USB ports and USB chargers.

With the USB Short Circuit Tester, you can:

  • Test over voltage or under voltage on VBUS
  • Check if there is a short circuit between VBUS and any of the data lines.
  • Detect invalid voltage on data lines.

Quantity Price (USD) ORDERING
1 - 4 $24.00 Add to cart
5 - 10 $22.00
11 or more $19.00


  • Protecting expensive USB devices by detecting bad ports
  • Quickly checks voltages on power and data lines
  • Seven red LEDs to indicate different type of failures.
  • Nearly indestructible device to test USB ports (protection up to +-100V).

Technical Specifications

Fault Detection: Over Voltage on VBUS, Under Voltage on VBUS, Short circuit between VBUS and any of the data lines, Invalid voltage on data lines
Pass Indicator: 1x Green "PASS" sign, Illuminates when all voltages are within the specification
Failure Indicators: 7x Red LEDs for indicating a bad voltage on VBUS, D+, D-, SSRX+, SSRX-, SSTX+, SSTX-
VBUS Red LED turns on if: 5.5V < VBUS < 7.75V
D+ or D- Red LED turns on if: V > 3.9V
SSRX+ or SSRX- or SSTX+ or SSRX- Red LED turns on if: V > 1.5V
Over Voltage Protection: Up to +-100V (VBUS and data lines)
Operational Voltage: 3.85V - 5.5V
Operational Current: 90mA
Size: 66mm x 24mm x 15mm
(2.6 x 0.9 x 0.6 inches)
Weight: 15g (0.5oz)
Storage Temperature: -30 ºC to + 80 ºC
Usage Temperature: 0 ºC to 70ºC
Part number: PM119
RoHS (Lead free): Yes

The specifications above are for the PassMark USB Short Circuit Tester hardware revision 001.

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