The T494D157M010AS is a tantalum surface mount capacitor manufactured by Kemet. It is part of the T494 series, known for its high reliability and stable performance in demanding applications. This capacitor is designed for general purpose use in a wide range of electronic circuits.

Applications

• Bypass Capacitors: Used to filter out unwanted noise and voltage spikes in electronic circuits.
• Decoupling Capacitors: Employed to provide a stable voltage source for integrated circuits, reducing voltage fluctuations.
• Filtering Applications: Used in power supplies and signal processing circuits to smooth out voltage and current variations.
• General Purpose Coupling: Can be used to couple signals between different stages of an electronic circuit.
• Timing Circuits: Suitable for timing applications where precise and stable capacitance is required.

Features

• Capacitance: 150 µF (Microfarads).
• Voltage Rating: 10 VDC (Volts Direct Current).
• Case Size: D Case (EIA 7343-31).
• Tolerance: ±20%.
• ESR (Equivalent Series Resistance): Specified ESR value depending on the datasheet. The lower the ESR, the better the capacitor performs in high-frequency applications.
• Operating Temperature Range: Typically -55°C to +125°C.
• Termination: Surface Mount (SMD).
• RoHS Compliant: Compliant with Restriction of Hazardous Substances directive.

Benefits

• High Reliability: Tantalum capacitors are known for their stable performance and long lifespan.
• Small Size: SMD design allows for high-density circuit layouts.
• Stable Performance: Provides consistent performance over a wide range of temperatures and frequencies.
• Low ESR: Minimizes power loss and heat generation, improving circuit efficiency.
• RoHS Compliance: Environmentally friendly due to the absence of hazardous substances.

Additional Details

The T494 series from Kemet is designed to meet the demanding requirements of modern electronic devices. This particular capacitor, the T494D157M010AS, features a D case size, which offers a good balance between capacitance and physical dimensions. Its 150µF capacitance and 10V voltage rating make it suitable for a wide array of applications. The surface mount design simplifies the assembly process and reduces the overall size of the circuit board.

Tantalum capacitors are polarized, meaning they must be connected with the correct polarity in the circuit. Reversing the polarity can damage the capacitor and potentially the entire circuit. Always refer to the datasheet for specific ESR values and other performance characteristics. The capacitor's construction utilizes tantalum powder, which is sintered to form a porous anode. A dielectric layer of tantalum pentoxide (Ta2O5) is then formed on the anode surface. This dielectric layer provides the insulating properties of the capacitor.