CGJ4J2X7R1C684K125AA CGJ4J2X7R1C684K125AA Ceramic Capacitor (MLCC)

CGJ4J2X7R1C684K125AA is a high-reliability grade ceramic capacitor (MLCC) manufactured by TDK, a global leader in electronic components. This specific component, categorized under Passive Components > Capacitors > Ceramic Capacitors (MLCC), is designed to provide stable capacitance in demanding environments. Ceramic capacitors are essential passive components used to store and release electrical energy, filter noise, and stabilize voltage in electronic circuits. The TDK CGJ4J2X7R1C684K125AA, despite its ‘Obsolete’ product status, remains a critical part for legacy systems or specific design requirements where its unique attributes are indispensable. Its robust construction and performance characteristics make it suitable for applications requiring stringent reliability standards.

Key Specifications

This TDK ceramic capacitor boasts several key specifications that define its performance and suitability for various applications. The ‘Apps.’ attribute, indicating ‘High Reliability Grade’, signifies that this capacitor is engineered for critical applications where consistent performance under challenging conditions is paramount. The ‘Brand’ is TDK, a testament to its quality and manufacturing excellence. The ‘Feature’ of ‘AEC-Q200General’ and the explicit ‘AEC-Q200’ value of ‘YES’ confirm its qualification for automotive applications, meaning it meets the rigorous stress test standards for passive components used in automotive electronics. A ‘Tolerance’ of ‘±10%’ for capacitance indicates a relatively tight manufacturing precision, ensuring the actual capacitance value is close to the nominal 680nF. The ‘L x W Size’ of ‘2.0mm x 1.25mm [EIA 0805]’ specifies its physical dimensions, corresponding to the widely recognized 0805 imperial case size, which is a common footprint for surface-mount components. The ‘Capacitance’ of ‘680nF’ (nanofarads) is the primary electrical storage capacity of the component. ‘T(Max.) / mm’ at ‘1.45’ refers to the maximum thickness of the component in millimeters. The ‘Temp. Chara.’ of ‘X7R’ denotes the temperature characteristic, signifying that the capacitance change over the operating temperature range is within ±15% (as confirmed by ‘Cap.Change or Temp.Coef.’). X7R dielectrics are known for their relatively stable performance across a wide temperature range. The ‘Component Type’ is clearly identified as ‘Ceramic Capacitor (MLCC)’. The ‘Product Status’ is ‘Obsolete’, which is an important consideration for new designs but does not preclude its use for maintenance or existing product lines. A ‘Rated Voltage [DC] / V’ of ’16’ indicates the maximum DC voltage that can be continuously applied across the capacitor without failure. Finally, an ‘Operating Temp. Range / °C’ of ‘-55 to 125’ highlights its ability to function reliably in extreme cold and hot environments, further supporting its high-reliability grade designation.

Features and Benefits

* **AEC-Q200 Qualified:** This capacitor meets the stringent AEC-Q200 standards, making it suitable for automotive and other high-reliability applications where robust performance under harsh conditions is required. * **Wide Operating Temperature Range:** With an operating temperature range from -55°C to 125°C, the CGJ4J2X7R1C684K125AA ensures stable operation across extreme thermal variations, crucial for industrial and automotive environments. * **Stable X7R Dielectric:** The X7R temperature characteristic provides a capacitance change of only ±15% over the full operating temperature range, offering predictable and reliable performance. * **Compact 0805 Package:** The 2.0mm x 1.25mm (EIA 0805) surface-mount package allows for space-efficient designs, enabling miniaturization of electronic products. * **High Capacitance in Small Footprint:** A capacitance of 680nF in an 0805 package provides significant energy storage and filtering capabilities for its size.

Typical Applications

The TDK CGJ4J2X7R1C684K125AA ceramic capacitor, with its high-reliability grade and AEC-Q200 qualification, finds application in a diverse range of demanding electronic systems: * **Automotive Electronics:** Due to its AEC-Q200 compliance, it is ideal for use in various automotive modules such as engine control units (ECUs), infotainment systems, advanced driver-assistance systems (ADAS), and body electronics, where reliability under vibration and temperature extremes is critical. * **Industrial Control Systems:** In industrial environments, where equipment is exposed to wide temperature fluctuations and electrical noise, this capacitor can be used for power supply decoupling, signal filtering, and timing circuits in PLCs, motor drives, and sensor interfaces. * **Medical Devices:** For non-life-sustaining medical equipment, its high reliability ensures stable operation in diagnostic tools, monitoring systems, and laboratory instruments where consistent performance is essential. * **Telecommunications Infrastructure:** It can be employed in base stations, network routers, and other communication equipment for voltage regulation, noise suppression, and impedance matching, contributing to stable signal integrity. * **Power Management Circuits:** The 680nF capacitance and 16V rating make it suitable for input/output filtering and decoupling in DC-DC converters, voltage regulators, and power supply modules, enhancing overall system stability and reducing ripple.

Summary

The TDK CGJ4J2X7R1C684K125AA is a robust, high-reliability grade ceramic capacitor designed for demanding applications. Its AEC-Q200 qualification, wide operating temperature range, and stable X7R dielectric make it a dependable choice for automotive, industrial, and other critical electronic systems. Despite its obsolete status, its proven performance attributes ensure its continued relevance for specific design and maintenance requirements. This component is stocked and shipped across India by Cirkit Electro Components, Mumbai.

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