UL Listed Current Transformer – 5AS by Sentran Corp

Product Description

The 5AS by Sentran Corporation is a UL Listed current transformer that can take an input from 50A to 6000A and output a corresponding 5A or 1A output.

The 5AS instrument current transformer is available in many different window sizes.  See the chart on the tab All Available Window Sizes for a full list of options.  The CTs in the drop-down are common sizes (that are often stocked).  This UL Listed current transformer incorporates internal  transient voltage suppressors (TVS) for shock protection in case the output leads are not terminated.

The output is linear from 10% to 100% of range with a ratio accuracy of +/- 0.5% full scale, depending on burden value.  The 5AS is UL Listed under UL2808 and IEC61010-1.

Additional Configuration Options (may increase lead time):

  • Accuracy can be adjusted to +/-0.5% full scale when known burden value is provided by customer
  • Relay protection is available up to C800 sizes.
  • Voltage withstands are available for up to 4700 Vac.

Compatible power meters accept an amperage input.  Look for meters on our website that start with this symbol:


You can view all of our current sensors here.


  • Standard 1 or 5 amp AC out, 600VAC rated
  • Up to C800 rating, many sizes
  • Select from 100A – 6,000A input
  • Ratio accuracies per C57.13-2007
  • Shock protection diodes
  • Meets UL2808, IEC61010-1 & C57.13
  • Overvoltage Category CAT IV rated
  • Input Current: AC current, sine wave, single phase 50/60Hz
  • Voltage Rating: 600VAC, tested CAT IV Overvoltage per UL2808
  • Output Current: Select either 1A or 5A and specify the burden and distance to metering instrumentation for optimal configuration.
  • Ratio and Linearity Accuracy: +/-1% full scale from 5% to 100% of FLA and exceeds IEC 60044-1, Table 11
  • Optional Accuracy: Opt 0.5: +/-0.5% full scale 5% to 100% of FLA and exceeds IEC 60044-1, Table 11
  • Bandwidth: 40Hz to 400Hz
  • Phase Relationship: Arrow points direction of source input current that produces positive output voltage on white wire
  • Temperature Range: -40°C to +70°C
  • Construction: Plastic housing 115°C. Designed and tested to UL2808 & CAN/CSA C22.2 No. 61010-1-12
  • Lead Wires: 8′ twisted black/white, 14AWG, UL1015. Custom lengths are available

Data Sheet

Technical Spec


UL Listed


Made in USA

ISO 9001

rohs compliant

All Available Window Sizes

5AS Sizes



Additional information

Weight2.15 lbs
Dimensions2 x 6 x 6 in
Input Amperage

100A, 200A, 400A, 600A, 800A, 1200A, 1600A, 2000A, 2500A, 3000A

Output Amperage

1A, 5A


1.25"x1.25", 1.5"x1.5", 2"x2", 3"x3.5", 5"x5", 4"x6", 5"x7"

Accuracy Class

0.5, 1.0

Lead Time

In-Stock, 1-2 weeks