Current transformers, a key passive component for measuring and protecting circuitry, are available in standard and custom specifications in China, one of their largest manufacturing hubs.
Typical units have a rated voltage rating of 0.5, 3, 6, 10, 35, 110, 220, 330 or 500kV, rated primary current range of 1 to 1,000A, rated secondary current range of 0 to 5A, CT ratio of 100:1 to 10,000:1, accuracy class of 0.001 to 1 and operating temperature of -40 to 75 C. For applications requiring water resistance features, there are configurations with more than an IP65 rating.
To attract market attention, suppliers continue to enhance features such as accuracy, reliability and anti-EMI. At the same time, they ensure industry quality standards are met and offer current transformers that are UL-listed, CE-marked and comply with ETL and RoHS requirements.
The main components are cores, and primary and secondary coils. Manufacturers source materials such as silicon steel sheet, ferrite, copper and aluminum wires, epoxy and polyamide from domestic or foreign providers, depending on buyers’ preferences. The cost of these inputs is expected to stay the same and keep product prices unchanged in the months ahead.
China is one the largest production bases for current transformers and will be benefiting from rising demand.
Globally, the product category is forecast to post a CAGR of 6.6 percent from 2023 to 2030, according to S&P, a Beijing-based consulting firm. In 2023, the market reached $9.4 billion.
Here are select current transformers from verified suppliers on GlobalSources.com.
Current transformer, 300A rated current
Company: Anhui Shirui Electronic Technology Co. Ltd
The CT1113-1-1-1-1-3535 current transformer from Anhui Shirui has a rated current of 300A. It is CE-approved and RoHS-compliant.
MOQ: 2,000 units
Lead time: 7 days
Current transformer, 30 to 200A variants
Company: Anhui Shirui Electronic Technology Co. Ltd
Anhui Shirui’s current transformer, the SRE-26XXX, is available in variants with a rated current of 30, 50, 100 or 200A. It is used for measuring AC, DC, pulse and other complex current signals. This unit, with a low-profile design, is RoHS-compliant.
MOQ: 100 units
Lead time: 7 days
Current transformer, 0.2 to 0.5s accuracy class
Company: Hubei Tianrui Electronic Co. Ltd
The TRFK-10A current transformer from Hubei Tianrui has 0 to 75A rated input current, 0 to 50mA rated output current at 0 to 1V, 0.2, 0.3, 0.5 or 0.5s accuracy class, 0.4, 0.66 or 0.72kV voltage level, 50/60Hz rated frequency and 1,000Mohm dielectric strength at 500V/min. The operating temperature is -40 to 70 C.
MOQ: 5 units
Lead time: 15 days
Current transformer, 0 to 800A rated input current
Company: Hubei Tianrui Electronic Co. Ltd
Hubei Tianrui’s current transformer, the TRSK-50A, has a rated input current of 0 to 800A, rated output current of 0 to 100mA at 0 to 7V, accuracy class of 0.2, 0.3, 0.5 or 0.5s, voltage level of 0.4, 0.66 or 0.72kV, rated frequency of 50/60Hz, dielectric strength of 1,000Mohms at 500V/min and operating temperature of -40 to 70 C.
MOQ: 5 units
Lead time: 15 days
Current transformer, 0 to 120A input current
Company: Jiangyin Spark Electronic Technology Co. Ltd
Jiangyin Spark’s XH-SCT-T16 current transformer has 0 to 120A input current, 0.66kV rated voltage, 50/60Hz rated frequency, 3,500V insulation voltage and -20 to 70 C operating temperature. It meets UL, CE and RoHS requirements.
MOQ: 10 units
Lead time: 3 days
Current transformer, IP67 rating
Company: Jiangyin Spark Electronic Technology Co. Ltd
An IP67 current transformer, the XH-FSCT-T36 from Jiangyin Spark has 100 to 600A rated current, 0.66 or 0.72kV maximum voltage, 50 to 400Hz rated frequency, 100Mohm at 500VDC and 3kVAC/min insulation resistance and strength, and -40 to 70 C operating temperature. Its accuracy class is 0.5 or 1.
MOQ: 10 units
Lead time: 3 days
