Z0402C121ESMST

Overview

The KEMET Z0402C121ESMST is a surface-mount multilayer ceramic capacitor (MLCC) designed for high-frequency applications. It features a 120 pF nominal capacitance with a ±25% tolerance, rated at a DC voltage of 50 V. The component utilizes a C0G (NP0) dielectric material, ensuring stable electrical characteristics over varying temperature and voltage conditions. Housed in a compact 0402 (1005 metric) package, it offers low equivalent series resistance (ESR) and inductance (ESL), making it suitable for RF circuits and decoupling applications where space constraints are critical.

Feature Summary

• Utilizes C0G (NP0) dielectric for exceptional capacitance stability across temperature and voltage ranges.
• Compact 0402 footprint enables high-density board layouts in portable electronics.
• Low parasitic inductance and resistance support high-frequency signal integrity.

Applications

• RF matching networks in wireless communication devices
• High-frequency decoupling in mobile processors
• Oscillator tuning circuits requiring precise frequency stability

Procurement Notes

Verify the complete part number against official KEMET documentation to ensure correct suffixes for termination and packaging specifications. Confirm RoHS compliance status and lead-free solderability requirements prior to integration into production lines. Cross-reference with authorized distributors to validate authenticity and traceability.

Selection Notes

Select this component when circuit design demands minimal capacitance drift under thermal stress or bias voltage changes. The C0G dielectric ensures predictable performance in precision analog and RF environments. Evaluate physical size constraints against the 0402 package dimensions to confirm compatibility with existing PCB footprints and assembly capabilities.

Part Context

This MLCC belongs to KEMET's general-purpose high-reliability ceramic capacitor family. It is engineered for consumer electronics and industrial equipment requiring robust performance in small form factors. The product line emphasizes consistency in manufacturing processes to maintain tight tolerance control and long-term reliability standards across global supply chains.

Replacement Considerations

Consult manufacturer cross-reference guides for direct equivalents from other suppliers offering identical 0402 C0G packages with matching 120 pF capacitance and 50 V ratings. Ensure substitute components meet the same AEC-Q200 or MIL-PRF-55681 qualification standards if required by the application environment.

FAQ

What is the temperature coefficient of the Z0402C121ESMST?

The capacitor uses C0G (NP0) dielectric, which provides a near-zero temperature coefficient, typically within ±30 ppm/°C, ensuring stable capacitance over a wide operating temperature range.

Is this component suitable for high-voltage pulse applications?

While rated for 50 V DC, C0G capacitors generally handle voltage pulses well due to their linear dielectric properties, but specific peak voltage limits should be verified against the manufacturer's absolute maximum ratings sheet.