08055C104K4T4A

The 08055C104K4T4A is an automotive-grade multi-layer ceramic capacitor (MLCC) from KYOCERA AVX, a global leader in advanced electronic components including capacitors, filters, connectors, and sensors. This 0805-sized MLCC delivers 0.1µF (100nF) capacitance at 50V DC rating with X7R dielectric and ±10% (K) capacitance tolerance. The X7R dielectric material provides a ±15% capacitance change over the full -55°C to +125°C operating temperature range, making it ideal for applications requiring stable performance across wide temperature variations. Qualified to AEC-Q200 automotive standards, this capacitor meets the stringent reliability requirements of the automotive industry. The nickel-barrier with tin (Ni/Sn) termination system provides excellent solderability and resistance to solder leaching during reflow soldering, and is fully compatible with lead-free soldering processes. The 08055C104K4T4A is also known by its KAM series equivalent part number KAM21BR71H104KM — AVX’s KAM series naming convention where “KAM” denotes the automotive MLCC series, “21” indicates the 0805 case size, “R7” designates X7R dielectric, “1H” specifies 50V, and “104” and “K” represent 100nF with ±10% tolerance. With MSL 1 moisture sensitivity classification, these capacitors can be stored indefinitely without dry packing, simplifying inventory management. KYOCERA AVX’s automotive MLCCs are used extensively in powertrain, body electronics, safety systems, and infotainment applications across the automotive industry.

A multi-layer ceramic capacitor (MLCC) stores electrical energy in the electric field between closely spaced conductive electrodes separated by a ceramic dielectric material. The 08055C104K4T4A is constructed by stacking alternating layers of conductive electrode material (typically nickel for cost-effectiveness and compatibility with reducing atmosphere firing) and X7R ceramic dielectric material. The number of layers and the thickness of each dielectric layer determine the total capacitance — more layers and thinner dielectric yield higher capacitance for a given package size. The electrode layers are connected in parallel via end terminations — odd-numbered layers connect to one end, and even-numbered layers connect to the other end — creating a single effective capacitor with capacitance proportional to the number of active layers. X7R is a Class II ceramic dielectric based on barium titanate (BaTiO3) with dopants that modify the Curie temperature and broaden the capacitance-temperature characteristic. The “X” in X7R indicates a minimum operating temperature of -55°C, the “7” indicates a maximum of +125°C, and the “R” indicates ±15% maximum capacitance change over that range. X7R capacitors exhibit capacitance variation with applied DC voltage (voltage coefficient of capacitance, VCC) and also with AC signal amplitude and frequency, which must be considered in design. The nickel barrier termination system consists of a copper base electrode connect layer, a nickel diffusion barrier layer, and a tin outer plating — this structure prevents solder leaching during assembly and ensures reliable solder joints.

The 08055C104K4T4A is a two-terminal surface-mount MLCC with the following terminal characteristics:

• Termination Material: Nickel Barrier / Tin (Ni/Sn) — copper base, Ni barrier, 100% matte tin outer plating
• Polarity: Non-polar — can be mounted in either orientation; MLCCs have no polarity
• Mounting: Surface mount on PCB pads with standard reflow soldering
• Recommended Pad Size: Per IPC standard for 0805 components

Note: MLCCs are non-polarized devices and can be mounted in either direction. For optimal reliability and mechanical strength, ensure proper pad design and solder fillet formation per IPC guidelines and the manufacturer’s recommendations.

• Automotive Powertrain Electronics: Used in engine control units (ECU), transmission control modules, and fuel injection systems for supply rail decoupling, signal filtering, and timing circuit applications requiring AEC-Q200 qualification
• Automotive Body Electronics: Deployed in body control modules (BCM), door controllers, lighting systems, and keyless entry modules for general power supply bypass and signal conditioning
• Safety Systems: Used in ABS/ESC modules, airbag control units, and ADAS sensor circuits where reliable operation and automotive qualification are critical for safety functions
• Power Supply Decoupling: The primary use — provides local decoupling (bypass) for integrated circuits and power supply ICs, supplying transient current and reducing power supply noise across the 0805 package size
• DC-DC Converter Filtering: Used as input and output capacitors in switching DC-DC converters for voltage ripple filtering and energy storage, supporting both buck and boost converter topologies
• Signal Filtering: Implements RC and LC low-pass, high-pass, and band-pass filters for analog signal conditioning in sensor interfaces, audio circuits, and communication systems
• Industrial Control Equipment: Found in PLC modules, motor drives, sensor interfaces, and industrial communication circuits requiring stable performance over wide temperature ranges
• Telecommunications and Networking: Used in telecom infrastructure equipment, routers, switches, and optical transceivers for power filtering, signal coupling, and clock circuit applications