AC Current Sensors
CS-450/475 & SC-550/575




  • Three ranges per unit reduces inventory
  • No field adjustment necessary, factory calibrated
  • Average measurement is equivalent to True RMS  for pure sine waves for the CS-450 / SC-550 series.
  • True RMS measurement for sine waves or variable frequency drives for the CS-475 / SC-575 series.
  • Input / Output isolation via current transformer
  • Solid-state reliability
  • Small compact size
  • Solid, reliable mounting method







The CS-450 / 475 and SC-550 / 575 series of AC current sensors are solid-state transducers that convert a primary circuit current to a proportional output signal. The sensors can monitor up to 200 Amps continuous and feature three jumper selectable current ranges for the highest accuracy. All sensors are factory calibrated to ensure better than 1% accuracy. The CS-450 and the SC-550 are available with 0-5, 0-10 Vdc or 4 -20 mA output signal types. The CS-475 and the SC-575 feature a true RMS 4-20 mA loop-powered output signal. All models are CSA certified, UL approved and CE compliant.



Input Current Ranges: Three field selectable ranges (See Below)
AC Conductor Hole: Split Core -20mm
Split Core -24 x 19 mm
Enclosure Size
(H x W x D):
Solid Core -49 x 87 x 25 mm
Split Core -70 x 87 x 30 mm
Operating Humidity: 0 to 95 % RH, non-condensing
Protection Circuitry: Reverse voltage protected and output limited
Wiring Connections: Solid Core -Barrier strip
Split Core - Screw terminals (14 to 22 AWG)
Enclosure Material: UL 94 V-0 flammability rated ABS
Manufacturing: ISO 9002 Certified

CS-450/SC-550           CS-475/SC-575          
Power Supply: 0-5/0-10 Vdc models are self-powered, 4-20 mA model requires 15-42 Vdc at sensor 15-42 Vdc at sensor (loop powered)
Maximum Input Current: 10/20/50 Amp ranges-80/120/180 Amps continuos
50/100/200 Amp ranges-120/200/325 Amps continuos
2/5/10 Amp ranges - 35/60/90 Amps continuous
10/20/50 Amp ranges -80/120/200 Amps continuos
50/100/200 Amp ranges -175/300/400 Amps continuos
Response Time: 100 mS (0-90%) 250 mS (0-90%)
Output Loading Error (0-5/0-10): Calibrated with 1 M ohm load, add 1.2% error with 100k ohm load N/A
Operating Temperature: -30 to 70 (-22 to 158 F) 0 to 70 (32 to 158F)
Output Signal & Accuracy 0-5 Vdc, 0-10 Vdc or 4-20 mA Better than 1% FS on all 3 ranges 4 to 20 mA represents 0 to 100% of current span Better than 1% FS on all three ranges