About Current Transformers

Current Transformers

A Current Transformer (CT) is a device designed to reduce an alternating current (AC) to a much lower, safer level. It is usually found in electric power systems for metering and/or protective relaying purposes. They are used to measure the level of current flowing through circuits and in most cases are connected to a meter or other monitoring device. The current transformer uses the concepts of electrical transformer to transform current levels between the primary (higher current) and secondary (lower current) windings. A typical current transformer is a wire wound toroidal core transformer, with a single primary winding, connected in series with the load, and a multiple secondary windings designed to provide an output current proportional to the current flowing through the primary.

Current Transformers

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(Ex. GST)(▲▼)		Enter Qty Mounting StyleInductanceCurrent RatingTurns RatioSecondary ResistanceTermination StyleLengthWidthHeightFrequencyFrequency RangeQualification
  
                
CST-1005


Current Transformers CURRENT SENSE TRANSFORMER, PRIMARY CURRENT: 5AMPS
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Triad Availability : 1010
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USD 4.5402
Multiples of: 1

Through_Hole 5 A1000:140 OhmsRadial23.5 mm12 mm24.8 mm 50 Hz / 60 Hz 
7492540100


Current Transformers WE-CST 5.6mH 1:100 40A EE13/7/4 SMT
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Wurth Availability : 1010
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USD 3.0056
Multiples of: 1

SMD/SMT5.6 mH40 A1:1000.805 OhmsSMD/SMT14.48 mm13.3 mm10.5 mm 1 MHz 
7492541000


Current Transformers WE-CST 540mH 1:1000 40A EE13/7/4 SMT
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Wurth Availability : 1009
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USD 3.0056
Multiples of: 1

SMD/SMT540 mH40 A1:100087.64 OhmsSMD/SMT14.48 mm13.3 mm10.5 mm 1 MHz 
BV EI 303 2011


Transformer: encapsulated; 2.3VA; 230VAC; 9V; 255mA; Mounting: PCB
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Hahn Availability : 1009
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USD 3.1546
Multiples of: 1

            
FIS121NL


Current Transformers THT Current Sense 94.5uH 4.5Ohms
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Pulse Availability : 988
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USD 1.6663
Multiples of: 1

            
PAS6322.100NLT


Current Transformers 4.5mH 3500V 50A DCR=.5mOhms T=1:100
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Pulse Availability : 987
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USD 2.7037
Multiples of: 1

PCB Mount           
PAS6322.050NLT


Current Transformers 1.1mH 3500V 50A DCR=.5mOhms T=1:50
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Pulse Availability : 985
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USD 2.6203
Multiples of: 1

PCB Mount1.1 mH50 A1:50 SMD/SMT12.8 mm7 mm    
BV EI 304 2041


Transformer: encapsulated; 2.6VA; 230VAC; 9V; 289mA; Mounting: PCB
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Hahn Availability : 978
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USD 3.0984
Multiples of: 1

            
53020C


Current Transformers 0.08mH 1:20 turns SM Curr Sense Txfr
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Murata Availability : 970
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USD 0.5262
Multiples of: 1000

Smd/Smt80 uH10 A1:20550 mOhmsSmd/Smt8.3 mm7.2 mm5.4 mm 50 KHz to 500 KHz 
PB0026NLT


Pulse Current Transformers CUR SENSE XFMR 100:1
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Pulse Availability : 970
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USD 2.1525
Multiples of: 250

Smd/Smt5.6 mH35 A100:11.4 OhmsSmd/Smt19.91 mm15 mm10 mm 50 KHz to 500 KHz 
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