Hainan Siter Electronics Co., Ltd. is located in Haian City, Nantong City, Jiangsu Province, with excellent transportation access. Courier and logistics services are highly developed, ensuring that most of the East China region can be reached the next day, whether for large or small shipments.

Hai'an Siter Electronics Co., Ltd. specializes in the production of toroidal transformers and is one of the earliest manufacturers in China to focus on the research and production of toroidal transformers. AdvocatesTall + Small HolesOne of the leading manufacturers, our company's products adhere to the GB8898-2011 national standards, renowned for their excellent quality, reasonable pricing, timely delivery, and attentive service. Our products are exported in large quantities and our company is a major producer of circular transformers in China, with a high level of recognition.

We accept both single sample orders and small batch orders at very fair and reasonable prices.One of our brand's service advantages is the ability to accommodate small batch and single-item orders!

Our company boasts strong technical capabilities and a comprehensive range of production and inspection equipment! We not only offer standard transformer models,We also cater to customers' special requirements for various transformers.One of our brand service advantages!For instanceOffering: Extra-thin, ultra-high, extra-large, extra-small, ultra-high power over 60KVA! Ultra-low power below 5VA, wide frequency range, multi-winding, high current, high voltage, moisture-proof, damp-proof, collision-proof, surge-proof, epoxy potting!

Our company operates 24/7 without any breaks throughout the year!

Our products come with free repairs for the first three years, with only labor costs charged after that. Special requests can extend the warranty period up to five years!

Our company adheres to principles of friendly cooperation, mutual benefits, and integrity. We are eager to establish partnerships with friends from all over the world and create remarkable achievements together!

Varieties of ring transformers (categorized by application): isolation transformers, output transformers, input transformers, waterproof transformers, weatherproof transformers, audio transformers, miniature transformers, autotransformers, step-up transformers, step-down transformers, control transformers, 400Hz intermediate frequency transformers; transformers for packaging machinery, automatic blinds transformers, machine tool transformers, stepper motor transformers, audio power amplifier transformers, noiseless and non-magnetic transformers for high-end audio, peach tree landscape lighting transformers, LED power transformers, air gap ring inductor filters, transformer for chargers, transformer for instruments and meters, CATV power supply transformers, inverter transformers, atomizer transformers, humidifier transformers, vibration disk transformers, automatic door transformers, sewing machine transformers, cutting machine transformers, overlock machine transformers, transformers for various applications requiring voltage transformation, transformers for primary and secondary isolation, and transformers for impedance transformation.