MA0805XR-106K-6R3ER

The Meritek MA0805XR-106K-6R3ER is a surface-mount multilayer ceramic chip capacitor from the MA Series, engineered for low-voltage (≤50VDC) general-purpose applications. As part of Meritek’s extensive MLCC portfolio, this component achieves a capacitance of 10µF within the compact 0805 (2012 Metric) footprint, making it an excellent choice for high-density PCB designs where board real estate is at a premium.

The X7R Class II dielectric provides a capacitance stability of ±15% across the full operating temperature range of -55°C to +125°C, ensuring reliable performance under varying environmental conditions. The 6.3VDC voltage rating positions this capacitor ideally for 3.3V and 5V power rail decoupling in digital and mixed-signal circuits.

Meritek employs advanced multilayer ceramic technology with precision layering to achieve high capacitance density. The termination structure consists of a copper (or silver) base electrode, a nickel barrier layer to prevent migration, and a pure tin outer layer for lead-free soldering compatibility. This construction ensures robust solder joint integrity and long-term reliability in demanding applications.

The MA Series is fully RoHS and halogen compliant, meeting current environmental regulations for global electronics manufacturing. With MSL 1 (unlimited floor life), the component requires no special moisture handling during assembly, simplifying production logistics.

1. Multilayer Ceramic Structure: The MA0805XR-106K-6R3ER consists of multiple alternating layers of X7R ceramic dielectric and internal metal electrodes, stacked and co-fired into a monolithic block. Each adjacent electrode pair forms an individual capacitor, and the parallel connection of dozens to hundreds of such layers yields the total 10µF capacitance within the small 0805 footprint.

2. X7R Dielectric Behavior: The X7R (Class II) barium titanate-based ceramic exhibits a relative permittivity (K) typically in the range of 2000–4000, enabling high capacitance density. The capacitance varies by no more than ±15% over the -55°C to +125°C range. However, Class II dielectrics exhibit DC bias effects — at 6.3V rated voltage, applying the full operating voltage can reduce effective capacitance by 20–40%, which must be accounted for in design margins.

3. Termination and Conduction Path: External terminals are constructed with a Cu/Ag base for electrical contact, a Ni barrier layer (≥2µm) to prevent silver ion migration and protect against solder leaching, and a pure Sn outer layer (≥3µm) for lead-free soldering. The wraparound terminal design ensures low equivalent series resistance (ESR) and low equivalent series inductance (ESL), critical for high-frequency decoupling performance.

4. Frequency-Dependent Performance: At low frequencies (1kHz), the capacitor behaves as a near-ideal capacitance. As frequency increases, the parasitic ESL and ESR become significant. The 0805 form factor’s relatively low ESL makes this component effective for mid-frequency noise suppression (100kHz–10MHz), particularly in switch-mode power supply output filtering and digital IC bypass applications.

Note: MLCCs are non-polarized components; Terminal A and Terminal B are interchangeable. The 0805 package uses wraparound terminations on opposite ends of the ceramic body.

• 3.3V/5V Power Rail Decoupling: Placed adjacent to digital ICs (MCUs, FPGAs, SoCs) to suppress transient voltage fluctuations and provide local charge storage for fast switching events
• DC-DC Converter Output Filtering: Used at the output of buck/boost regulators to smooth ripple voltage and reduce output noise in battery-powered devices
• Consumer Electronics Power Management: Bulk decoupling in smartphones, tablets, and wearables where 3.3V or lower supply rails are prevalent and 0805 footprint is preferred for space efficiency
• Telecommunication Module Bypass: Noise filtering on power supply lines in RF modules and baseband processors, ensuring signal integrity in communication systems
• Portable Device Battery Line Filtering: Stabilizing battery voltage at the input of LDO regulators and power management ICs in handheld and IoT devices