STC05,06P Series surface mount toroidal coils and common mode toroidal choke,SMD Common mode inductor with case
The STC05/06P series SMD toroidal common-mode choke uses a high-frequency design and enclosed structure. It provides excellent common-mode noise suppression performance in high-frequency applications.The high saturation core material ensures stable inductance under high-current bias conditions. The low DCR reduces power loss.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.
High-frequency design – excellent performance
High saturation core material
Low EMI radiation
Low DCR
Enclosed with case structure
SMD package – supports automated placement
Operating temperature – -40°C to +125°C
Storage temperature – -55°C to +125°C
Electronic appliance power filtering
DC-DC conversion (parallel mode)
Isolation coupling (transformer)
Input filtering (series mode)
EMI/RFI suppression
Communication equipment power supplies
High-frequency switching power supplies
Computer peripheral power supplie
Inductance measure at 100KHz 0.1VRms.
Insulation Resistance: 100Vdc 1KMΩmin.
RDC:QuadTech 1880 Milliohmmeter
Operating temperature:-40℃ to +125℃
Storage Temperature: -55℃ to +125℃
Different package available per special request
Max of 35% saturation on DC bias applied
![]()
Q: What is the difference between the STC05 and STC06P series?
A: The STC05 and STC06P series mainly differ in package size and corresponding electrical parameters (inductance, rated current, etc.). The STC06P typically offers higher rated current and better high-frequency performance. For specific selection, please refer to the datasheet or contact our technical support team.
Q: What are the advantages of the high-frequency design for this product?
A: The high-frequency design optimises core material and winding structure. It allows the product to maintain high common-mode impedance and stable filtering performance at higher switching frequencies (such as hundreds of KHz to MHz range). It is suitable for next-generation high-frequency DC-DC converters and switching power supplies.
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.
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.