The rise in automotive electrification, renewable energy systems, and high-density industrial power supplies is driving demand for power electronics that deliver more performance in less space, all without compromising safety or long-term reliability. In particular, engineers need compact safety-certified components that support high-voltage operation and stringent insulation requirements.
To support these demands, Knowles has expanded our X1/Y2 safety-certified surface-mount multilayer ceramic capacitor (MLCC) portfolio. Our new 3825 case size offers enhanced capacitance options, optimized creepage distance, and proven durability for high-voltage applications.
Our new 3825 case size safety-certified MLCC range builds on our established safety capacitor portfolio by extending capacitance values up to 18nF at 310Vac. This supports reliable interference suppression and insulation performance in compact designs where board space is at a premium. Plus, the combination of higher capacitance options with a compact surface-mount footprint gives engineers greater flexibility when designing AC and DC line filtering solutions for modern power conversion systems.
Our expanded X1/Y2 MLCC range delivers several performance advantages designed to meet the safety and reliability needs of demanding automotive and industrial environments. Key features include:
Enhanced safety ratings: Industry-leading Class X1/Y2 certification with an extended capacitance range up to 18nF at 310Vac for robust interference suppression
Optimized high-voltage footprint: Minimum 7mm creepage distance in a 3825 case size, enabling safe operation in high-voltage environments while maximizing PCB real estate
Superior environmental durability: Rated for 1500Vdc and certified to Humidity Grade IIIB (85°C/85% RH for 1,000 hours), ensuring long-term reliability in harsh, moisture-prone conditions
Automotive-grade reliability: AEC-Q200 qualified with flexible terminations to withstand mechanical flexure and thermal shock from -55°C to +125°C
Engineers can choose from multiple capacitance and voltage combinations within the new 3825 case size, with values ranging from 1nF to 18nF and voltage ratings spanning 310Vac through 660Vac as shown in the table below.
This flexibility supports a wide range of global design requirements and regulatory standards, making the new X1/Y2 MLCCs suitable for diverse markets and applications.
As EVs, datacenter servers, and renewable energy inverters continue to scale in power and complexity, component selection plays a critical role in meeting safety, compliance, and performance goals. Our new X1/Y2 surface-mount MLCCs are designed to help engineers meet stringent insulation and surge testing requirements, while also supporting miniaturization trends across EV power electronics and industrial energy systems.
These new safety certified MLCCs are available for purchase now through Digikey.
Explore our full portfolio of safety-certified MLCCs to find the right solution for your next high-voltage design.