35mm Mini Split-Core Current Transformer

The CTSA family of mini split-core current transformers offers fast and easy installation into existing AC electric power distribution systems where space is a premium. The split-core current transformers feature a high performance magnetic core in a small physical package, providing highly accurate AC current measurement. The robust packaging features a mechanical hinge for multiple open/ close actions, tight fitting of the mating core halves and secure closure of the current transformer after installation. This feature insures consistent and highly accurate performance over the life of the current transformer.

The robust CTSA split-core current transformer design, manufactured in an ISO9001 certified manufacturing facility, insures many years of defect free operation backed by a strong product warranty of 36 months.



Typical ModelsRated Current (Ampere)Accuracy Class
CTSA035-200A/ 0.333V or mA option200A0.5/ 1.0
CTSA035-300A/ 0.333V or mA option300A0.5/ 1.0
CTSA035-400A/ 0.333V or mA option400A0.5/ 1.0
CTSA035-500A/ 0.333V or mA option500A0.5/ 1.0
  • Input Frequency: 50 to 400 HZ
  • Maximum Primary Voltage: 720 VAC
  • Dielectric Withstand Voltage: 2,500V for 1 minute
  • Dielectric Resistance: 100 MOhms @ 500 VDC
  • Operating temperature: -15ºC to +60ºC
  • Construction:
  • Opening: 35.2mm (1.39″)
  • Core material: Silicon steel CRGO (cold rolled grain oriented)
  • Epoxy encapsulated
  • Case: Nylon UL flame retardant rating 94V-0
  • Standard Leads: 0.61m (2 ft.), UL 1015, twisted pair, 0.34mm2 (22AWG)
  • UL Certification E466650
  • RoHS Compliant
Physical Specifications:
Dimension mm (in)
56.4mm (2.22″)40.8mm (1.61″)83.8mm (3.30″)35.2mm (1.39)

Download CTSA035 Data Sheet (pdf 337kb)

Many of our products can be designed and manufactured to meet the specific application requirements. For a no obligation technical evaluation, contact us with your specific performance requirements.