KEMET C1812W154KBRAC7800

KEMET's ArcShield high-voltage surface-mount X7R dielectric capacitors are designed for high-voltage applications prone to surface flashover (arc discharge).

Surface flashover is caused by high voltage gradients between the two termination faces within the ceramic body, or between one termination face and the opposing internal electrode structure. This phenomenon most commonly occurs when the applied voltage reaches or exceeds 300 V, in high-humidity environments, and in chip sizes with minimal spacing (creepage distance) between terminations. It can damage surrounding components or cause dielectric breakdown, ultimately resulting in a short circuit (catastrophic failure mode).

The patented ArcShield technology employs KEMET's highly reliable base metal dielectric system combined with a unique internal shielding electrode structure, designed to suppress arc discharge events while increasing available capacitance. This internal system is developed based on a partial Faraday cage principle, delivering unmatched performance and reliability compared to external surface coating technologies.

To enhance reliability, KEMET's flexible termination technology is an optional solution offering superior flex crack resistance compared to standard termination systems. It is designed to address flex cracking — the primary failure mode of MLCCs — typically caused by excessive tensile and shear stresses during board flexing and thermal cycling. The flexible termination technology suppresses the transfer of board stress to the rigid MLCC body, reducing flex cracks that can lead to low insulation resistance or short circuit failures.

KEMET's ArcShield high-voltage surface-mount MLCCs are available in automotive-grade versions, which are subject to more stringent testing protocols and inspection standards. Whether under the hood or in-cabin, these devices are suitable for mission-critical and safety-critical automotive circuits, or applications requiring reliable performance in harsh environments. Automotive-grade devices comply with the AEC-Q200 qualification requirements of the Automotive Electronics Council.

• Patented technology
• Permanent internal arc protection
• No protective surface coating required
• Base metal electrode (BME) dielectric system
• Industry-leading capacitance-voltage (CV) values
• Operating temperature range: -55°C to +125°C
• Superior high-frequency performance
• Pb-free, RoHS and REACH compliant
• Available in EIA 0402, 0603, 0805, 1206, 1210, 1808, 1812, 1825, 2220, and 2225 case sizes
• DC voltage ratings of 500 V, 630 V, and 1 kV
• Capacitance range from 1000 pF to 560 nF
• Capacitance tolerances of ±5%, ±10%, and ±20%
• Low ESR and ESL
• Non-polarized device, reducing mounting concerns
• Available in commercial and automotive grade (AEC-Q200) versions
• 100% pure matte tin-plated termination finish for excellent solderability
• Tin-lead (SnPb) termination finish option available upon request (minimum 5% lead content)
• Flexible termination option available upon request