The STC01-04 series SMD toroidal common-mode choke uses an enclosed design and toroidal core structure to effectively reduce electromagnetic radiation. It is suitable for EMI-sensitive power and signal line filtering applications.The product offers multiple package sizes. The low DCR and high saturation core material ensure stable performance under high-current conditions.The SMD package supports automated pick-and-place assembly, compatible with SMT production lines.It is widely used in electronic appliances, DC-DC conversion (parallel mode), isolation coupling, input filtering (series mode), and EMI/RFI suppression.
Inductance measure at 100KHz 0.1VRms.
Insulation Resistance: 100Vdc 1KMΩmin.
Operating temperature:-40℃ to +125℃
Storage Temperature: -55℃ to +125℃
RDC:QuadTech 1880 Milliohmmeter
Soldering temperature:260℃ for 4±1 seconds
Different package available per special request
Max of 35% saturation on DC bias applied
Q: What are the differences between the STC01-04 series models?
A: The STC01, STC02, STC03, and STC04 series mainly differ in package size and corresponding electrical parameters (inductance, rated current, etc.). STC01 is the smallest size, suitable for compact designs. STC04 is the largest size, suitable for higher power applications. For specific selection, please refer to the datasheet or contact our technical support team.
Q: What are the advantages of the enclosed structure?
A: The enclosed structure fully encapsulates the core and windings within the housing. It provides physical protection and better insulation performance, while further reducing EMI radiation. The enclosed design also prevents foreign objects from contacting the windings, improving product reliability in harsh environments.
Q: What are the advantages of high saturation core material?
A: High saturation core material offers higher saturation flux density. It is less likely to saturate under high-current bias conditions, ensuring the common-mode choke maintains stable inductance and filtering performance within the rated current range. The DC bias saturation is up to 35%, providing sufficient current margin.