S120 20K Hz bandwidth 2000A Clamp On Current Transformer

clamp current transformer

The S120 current clamp is a high performance AC Clamp on current transformer probe with excellent transformation and low phase shift. The high quality magnetic permalloy core and uniform windings provide for accurate measurements up to 3000AAC/2000AAC/1000AAC/500AAC. The "ring type" jaw permits good magnetic conduction and cable positionings. Provide excellent RMS capabilities and reliable signal reproduction.



The S120 clamp on ct is well suited for power quality applications where high accuracy and low phase shift along with wide frequency from 10Hz to 2MHz are important. Measurement range is 100mA to 3000A.
The S120 clamp on current transformer is a general purpose 3000A AC Clamp current probe transformer designed for use with DMMs & BNC, cable fault analysis and loggers instruments that have a current input. It has a 1000:1 or 2000:1 ratio and output of 1mA per amp or 1mV per amp measured in the jaw. The S120 has an integral 2.5m or 5m lead terminated. The rounded jaw design on this clamp probe makes it well-suited for cable fault analysis applications where high accuracy and low phase shift and wide frequency.


  • Cable fault analysis;
  • Power load monitoring;
  • Waveform analysis(oscilloscopes meter);
  • Power quality analyzer(PQA);
  • Power and harmonic meters;
  • Energy meter calibrator;
  • Measuring around cable bundles;
  • Power meter;
  • Data logging/recording;
  • Large industrial loads;
  • Power quality monitoring;
  • CT secondary current detection;


  • Measurement range of 1mA to 3000A AC;
  • Improved ergonomic design & easy operation;
  • High content nickel metal permalloy core;
  • High precision 0.1% for current measurement;
  • Low phase shift for power measurement;
  • Frequency 10-2MHz;
  • Holding wire diameter: φ120mm;
  • Conforms to EN 61010, 600V CAT III;
  • Transformation ratio: 1000:1, 2000:5, 3000:5;
  • Designed for DMMs, recorders, loggers, oscilloscopes, power and harmonic meters;
  • Industrial design & beautiful appearance;
  • UL, CE CNAS mark;


Electrical parameters
Ratio 1000: 1, 2000:5 or 3000:5(customized)
Accuracy class 0.1%, 0.2%, 0.5%
Primary current 0 - 3000A AC
Secondary current 0-1A or 0 - 5A AC (customized)
Secondary voltage 0-2V , 0-5V AC (customized)
Max. Cont. Input current 3600A
Load capacity ≤20Ω, standard 4Ω
Over voltage category CAT III 600V
Output signal (AC current) 500mA, 1A,2A,5A AC at nominal input current
Output signal (AC voltage) 1V, 2V, 5V, 10V AC at nominal input current
Frequency range 10Hz-2MHz
Dielectric strength 3KV 50Hz/60Hz at 1 minute
Temperature range -40°C to +55°C
Output 2.5 meter cable with D01 connector or BNC
Max. voltage not insulated conductors 600 V
Standard EN 61010-1, EN 61010-2-032, EN 61010-2-031
IEC60044-1, & IEC61869-2, 600V CAT III
Installation clamp type
Output mode lead output(2.5m, 5m or 10m)
Connector BNC, 4mm banana, signal cable(2 cores),customized
Range version 100A, 200A, 400A, 500A, 1000A, 2000A, 3000A
Accuracy (3000A Range)
0-10A ≤0.5%
10-100 ≤0.2%
100-3000A ≤0.1%
Phase Shift(3000A Range)
0-10A ≤0.5°
10-100 ≤0.2°
100-3000A ≤0.1°
Mechanical parameters
Dimensions (L x W x H) (mm) 178 x 290 x 30
Weight (g) 1200
Holding wire diameter (mm) φ120
Max. jaw opening (mm) 120
Jaw color Red & Grey
Material PC+ABS, UL94 V0


Model Rate Current Max Current Secondary Current Coil Ratio Burden Resistance Accuracy
S120-200 200A 240A 5A 40:1 2.5VA 0.5%
S120-300 300A 360A 5A 60:1 2.5VA 0.5%
S120-400 400A 480A 5A 80:1 2.5VA 0.5%
S120-500 500A 600A 5A 100:1 2.5VA 0.5%
S120-600 600A 720A 5A 120:1 2.5VA 0.5%
S120-800 800A 960A 5A 160:1 2.5VA 0.5%
S120-1000 1000A 1200A 5A 200:1 2.5VA 0.5%
S120-1500 1500A 1800A 5A 300:1 2.5VA 0.5%
S120-2000 2000A 2400A 5A 400:1 2.5VA 0.5%
S120-3000 3000A 3600A 5A 600:1 2.5VA 0.5%
S120A1-200 200A 240A 1A 200:1 customized 0.2%
S120A1-300 300A 360A 1A 300:1 customized 0.2%
S120A1-400 400A 480A 1A 400:1 customized 0.2%
S120A1-500 500A 600A 1A 500:1 customized 0.2%
S120A1-600 600A 720A 1A 600:1 customized 0.2%
S120A1-800 800A 960A 1A 800:1 customized 0.2%
S120A1-1000 1000A 1200A 1A 1000:1 customized 0.1%
S120A1-1500 1500A 1800A 1A 1500:1 customized 0.1%
S120A1-2000 2000A 2400A 1A 2000:1 customized 0.1%
S120A1-3000 3000A 3600A 1A 3000:1 customized 0.1%
S120A2-500 500A 600A 500mA 1000:1 customized 0.1%
S120A2-600 600A 720A 500mA 1200:1 customized 0.1%
S120A2-800 800A 960A 500mA 1500:1 customized 0.1%
S120A2-1000 1000A 1200A 500mA 2000:1 customized 0.1%
S120A3-800 800A 960A 400mA 2000:1 customized 0.1%
S120A3-1000 1000A 1200A 400mA 2500:1 customized 0.1%
S120A4-250 250A 300A 250mA 1000:1 customized 0.1%
S120A4-500 500A 600A 250mA 2000:1 customized 0.1%
S120A4-1000 1000A 1200A 250mA 4000:1 customized 0.1%
S120V5-200 200A 240A 1V 1000:1 customized 0.1%
S120V5-300 300A 360A 1V 1000:1 customized 0.1%
S120V5-400 400A 480A 1V 1000:1 customized 0.1%
S120V5-500 500A 600A 1V 1000:1 customized 0.1%
S120V5-600 600A 720A 1V 1000:1 customized 0.1%
S120V5-800 800A 960A 1V 1000:1 customized 0.1%
S120V5-1000 1000A 1200A 1V 1000:1 customized 0.1%
S120V5-2000 2000A 2400A 2V 1000:1 customized 0.1%
S120V5-3000 3000A 3600A 3V 1000:1 customized 0.2%
S120V6-200 200A 240A 5V 1000:1 customized 0.1%
S120V6-300 300A 360A 5V 1000:1 customized 0.1%
S120V6-400 400A 480A 5V 1000:1 customized 0.1%
S120V6-500 500A 600A 5V 1000:1 customized 0.1%
S120V6-600 600A 720A 5V 1000:1 customized 0.1%
S120V6-800 800A 960A 5V 1000:1 customized 0.1%
S120V6-1000 1000A 1200A 5V 1000:1 customized 0.1%
S120V6-2000 2000A 2400A 5V 1000:1 customized 0.1%
S120V6-3000 3000A 3600A 5V 1000:1 customized 0.2%
S120V8-200 200A 240A 10V 1000:1 customized 0.1%
S120V8-300 300A 360A 10V 1000:1 customized 0.1%
S120V8-400 400A 480A 10V 1000:1 customized 0.1%
S120V8-500 500A 600A 10V 1000:1 customized 0.1%
S120V8-600 600A 720A 10V 1000:1 customized 0.1%
S120V8-800 800A 960A 10V 1000:1 customized 0.1%
S120V8-1000 1000A 1200A 10V 1000:1 customized 0.1%
S120V5-3000 30/300/3000A 36/360/3600A 1V or 3V 1000:1 customized 0.2%

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