150D154X0020A2B Capacitors

Series:	TANTALEX®, 150D
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Capacitance:	0.15µF
Tolerance:	±20%
Voltage - Rated:	20V
Type:	Hermetically Sealed
ESR (Equivalent Series Resistance):	--
Operating Temperature:	-55°C ~ 125°C
Lifetime @ Temp.:	1000 Hrs @ 125°C
Mounting Type:	Through Hole
Package / Case:	Axial
Size / Dimension:	0.135" Dia x 0.286" L (3.43mm x 7.26mm)
Height - Seated (Max):	--
Lead Spacing:	--
Manufacturer Size Code:	A
Ratings:	--
Features:	General Purpose
Failure Rate:	--

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Tantalum Capacitors

Tantalum capacitors are non-polarized, solid–state capacitors utilizing tantalum powder as the active electrode and a metal oxide compound, typically tantalum pentoxide, as the dielectric. By far, they are the most plentiful of the non-polarized capacitors and can store up to 100 µF values in practical surface-mounted packages. Their exceptional electrical characteristics and relatively low costs have made them popular in today’s electronics. The 150D154X0020A2B is an axial polarized tantalum capacitor. It has a voltage rating of 10 volts DC, a capacitance of 1uF, and a tolerance of 10%. It is mainly used as a bypass capacitor in power supplies, amplifiers and other high-frequency power circuits.

Application Field and Working Principle

Tantalum capacitors are mainly used for microelectronic applications and power management circuits due to their superior electrical performance, small size, low leakage current, and long lifetime. In general, tantalum capacitors are typically used to filter or bypass small-signal AC in sensitive analog circuits. Tantalum capacitors generally come in two form factors: a molded axial-lead component or a flat-pack component with two solid pins. Both are manufactured by blending powdered tantalum with a conductive polymer resin to form its dielectric. The pins are then soldered onto a printed wiring board. The working principle of a tantalum capacitor is by forming an electric ‘sandwich’ between two compartments, one containing the positive charge and the other containing the negative charge, trapping an electrical field between them. This electric field, when produced, prevents current from flowing through the capacitor; however in reality, some degree of current leakage does occur, which is known as DC leakage and effectively lowers the capacitance of the capacitor. Because the active tantalum deposit is so thin (usually a few um), it is also subject to an effect called “transient voltage drop”. This is basically a phenomenon wherein the dielectric forming material is unable to hold the charges and eventually releases it in the event of a sudden large voltage surge passing through the capacitor. This can lead to a significant voltage drop appearing across the capacitor and may damage the circuit. The transient voltage drop can be minimized by using capacitors with relatively large values, typically above 100µF. In addition, the typical operating temperature range of tantalum capacitors is -55°C to +125°C; while higher temperatures can be achieved, they impose a significant reduction in the life expectancy of the capacitor. The advent of solid tantalum capacitors have made microelectronic devices reliable, since they can enhance electrical performance, reduce size and power consumption. They are also much more economical than their predecessors, and have taken the industry by storm.

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