Import Grewin Electrical Supply Toroidal Transformer — Buy in wholesale FOB from Supplier in China

The Grewin Electrical Supply Toroidal Transformer series from Tianjin Grewin Technology Co., Ltd. offers power ratings from 50VA to 5000VA, with standard input voltage options of 220V or 230V and output voltage of 12V across all models. Dimensions scale with power, ranging from 80x38mm for the 50VA unit to 230x135mm for the 5000VA model, with corresponding weights increasing from 0.74kg to 24kg. Each transformer uses a 100% copper core, as confirmed by the supplier’s technical documentation and test reports.

Toroidal transformers in this series typically achieve efficiency ratings between 75% and 98%, depending on load and design, with external diameters spanning 40mm to 300mm and heights from 13mm to 130mm for custom configurations. The supplier’s production process includes nine rigorous tests: no-load, inductive voltage, load, temperature rise, insulation resistance, hi-pot, leakage inductance, DC resistance, and surface inspection. These transformers are suited for applications in audio equipment, electric controls, computers, instrumentation, telecommunications, and mid to high-end video systems due to their low electromagnetic interference and compact design.

Buyers source these transformers for use in industrial control panels, renewable energy systems, and specialized audio applications where space efficiency and reliable performance are critical. The supplier supports customization for installation dimensions, voltage specifications, and power requirements, with a production history of 14 years in the transformer industry. Standard export packaging includes cartons and pallets, with all units manufactured to IEC standards and backed by ISO9001:2015, CE, and SGS approvals.

Tianjin Grewin Technology Co., Ltd. is based in Tianjin, China, with its registered address at 2# Meinian Plaza, No.16 Dongting Road, 300222. The company holds a Harbor trust tier on the platform and has obtained certifications including ISO9001:2015, CE, SGS, VDE, and UL, alongside IEC compliance reports. Its product line focuses exclusively on toroidal and specialized transformers, with a stated commitment to quality control through a nine-step testing process.

The supplier has 14 years of experience in transformer manufacturing and offers customized solutions for audio, solar, and other industrial applications. While the response rate and average response time are currently listed as zero, the company emphasizes technical support and long-term service, with a sales and engineering team providing 5 to 10 years of post-purchase assistance. All production follows export-standard packaging and adheres to international electrical safety and performance standards.