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**Tech Detail: TDK MMZ0402EUC Series Patch Magnetic Beads**
TDK Corporation has introduced the MMZ0402EUC series of **patch magnetic beads**, designed to enhance performance in modern mobile devices. These components are known for their **lowest DC resistance** among similar-sized chips, making them ideal for power and signal circuits in smartphones, tablets, and other portable electronics.
At 100MHz, the two new patch beads offer impedance values of **150Ω** and **180Ω**, with DC resistances as low as **0.62Ω** and **0.69Ω**, respectively. This combination significantly reduces power loss while delivering superior noise suppression. Despite its compact size—measuring just **0.4mm x 0.2mm x 0.2mm**—the MMZ0402EUC provides **20% higher impedance** compared to TDK’s existing MMZ chip beads with the same DC resistance rating. Additionally, it supports a higher rated current of **350mA** and **300mA**, further improving efficiency in high-demand applications.
The MMZ0402EUC series is built using advanced TDK materials, which optimize the ratio of impedance to DC resistance. It operates reliably across a wide temperature range of **-55°C to +125°C**, ensuring stability in various environments. TDK plans to expand the available impedance options in this small form factor to meet the evolving needs of mobile device designers.
Mass production of the MMZ0402EUC series began in **August 2017**, marking a significant advancement in the field of **EMC (Electromagnetic Compatibility)** components. With its excellent performance and miniaturized design, these magnetic beads are a key solution for reducing electromagnetic interference in next-generation devices.
**Key Applications**
- Smartphones
- Tablets
- Other mobile devices
**Main Features & Benefits**
- **Lowest DC resistance** for its size (as low as 0.62Ω)
- Impedance of 150Ω and 180Ω at 100MHz
- 20% higher impedance than similar-sized chips
- Compact size: 0.4mm x 0.2mm x 0.2mm
- Wide operating temperature range (-55°C to +125°C)
- Higher rated current (350mA and 300mA)
This innovative product line showcases TDK’s commitment to developing high-performance, space-saving components that support the growing demands of modern electronics. Whether for power management or signal integrity, the MMZ0402EUC series is a reliable choice for engineers looking to improve system performance and reduce noise in mobile applications.