T520B686M004ATE070

Series:	KO-CAP® T520
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	68µF
Tolerance:	±20%
Voltage - Rated:	4V
Type:	Molded
ESR (Equivalent Series Resistance):	70 mOhm @ 100kHz
Operating Temperature:	-55°C ~ 105°C
Lifetime @ Temp.:	2000 Hrs @ 105°C
Mounting Type:	Surface Mount
Package / Case:	1411 (3528 Metric)
Size / Dimension:	0.138" L x 0.110" W (3.50mm x 2.80mm)
Height - Seated (Max):	0.083" (2.10mm)
Lead Spacing:	--
Manufacturer Size Code:	B
Ratings:	--
Features:	General Purpose

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Tantalum – Polymer Capacitors

Tantalum-polymer capacitors, also known as polymer capacitors, are a type of dry electrolytic capacitor that use a solid electrolytic tantalum layer and a thermoplastic as the insulation element. They benefit from the combination of tantalum’s high capacitance and low ESR and the polymer’s excellent high temperature stability, low ESR, and high voltage capabilities. The applications and working principles of T520B686M004ATE070 capacitors are discussed below.

Applications of T520B686M004ATE070 Capacitors

T520B686M004ATE070 capacitors are commonly used for their ability to handle high temperatures and voltages. Typical applications include frequency converters, UPS systems, DC/DC converters, and networks for power supplies, renewable energy, medical and automotive systems. In aircraft and automotive applications, T520B686M004ATE070 capacitors can be used for safety-critical circuits in combination with an external fuse. This prevents catastrophic failures. Additionally, these capacitors are popular in power converters such as those used in motor drives, actuators, and sunroofs. They are also used in LED drivers, modern satellite systems, and LED lighting applications. The flexibility of the electrolytic metal film and polymer allow these capacitors to be compact and lightweight. As a result, they are often used in portable electronic devices where small footprint is necessary. These devices range from cellphones, tablets and laptop computers to handheld gaming devices and modern TVs.

Working Principles of T520B686M004ATE070 Capacitors

T520B686M004ATE070 capacitors are constructed using a solid tantalum layer surrounded by a thermoplastic polymer. The combination of these two materials produce capacitors with high capacitance, low ESR, high temperature stability, and high voltage capability. The working principle of T520B686M004ATE070 capacitors is based on the same principle as conventional aluminum electrolytic capacitors. The tantalum layer acts as the anode and is connected to an external anode lead. The cathode layer is composed of the polymer, which is connected to the external cathode lead. The anode lead and polymer cathode are connected in series to form the capacitor. In operation, the positive charge of the anode attracts the negative charge of the polymer cathode, thus creating an electric field between them. This electric field produces a stored electrical energy that is discharged upon application of an external voltage. This electricity is stored within the capacitor allowing it to act as a filter or temporary storage device.

Conclusion

T520B686M004ATE070 capacitors are a great choice for many high temperature and high voltage applications. With excellent sealing and capacitance, these capacitors are ideal for many demanding tasks. Additionally, due to their small footprint, T520B686M004ATE070 capacitors are used in many portable electronic devices. The functioning of these capacitors is similar to conventional aluminum electrolytic capacitors and is based on the electric field created between the anode and cathode layers.

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