UPX1A102MHD

Lifetime @ Temp.:	20000 Hrs @ 105°C
Operating Temperature:	-55°C ~ 105°C
Polarization:	Polar
Ratings:	--
Applications:	General Purpose
Ripple Current @ Low Frequency:	756mA @ 120Hz
Ripple Current @ High Frequency:	1.008A @ 100kHz
Lead Spacing:	0.197" (5.00mm)
Size / Dimension:	0.492" Dia (12.50mm)
Height - Seated (Max):	1.043" (26.50mm)
Surface Mount Land Size:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Can
Series:	UPX
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Not For New Designs
Moisture Sensitivity Level (MSL):	--
Capacitance:	1000µF
Tolerance:	±20%
Voltage - Rated:	10V
ESR (Equivalent Series Resistance):	--

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Aluminum Electrolytic Capacitors are widely used in various applications which requires large capacitance and relatively low equivalent series resistors. In order to meet customer demand, many types of aluminum electrolytic capacitors are available, and a example of them is UPX1A102MHD, which has many advantages and is popularly used in a variety of applications. This article mainly discuss its application fields and its working principle.Application FieldsUPX1A102MHD aluminum electrolytic capacitors are commonly used in a variety of fields, such as the power electronics and the telecommunications industry. It is popularly used for smooth operation and power factor correction of motor drives, energy monitoring, rectification, smoothing, peak load compensation and power supply circuits in the power electronics industry. It is also used in Telco and LAN systems, ISDN, ADSL ATM, STM-1, DECT and Polycom. It finds use in wireless communication, digital electronics, electronic power supplies, electronic subsumption, semiconductor test equipment, audio equipment and aerospace systems.Working PrincipleThe UPX1A102MHD aluminum electrolytic capacitor is constructed with an anode of aluminum foil with a rectifying effect which is rolled into a spiral shape and an electrolyte filled in the wound cathode, also called \'electrolytic paper\'. The anode is etched with radial lines in order to provide an effective increase in the effective surface area and efficient distribution of the electric current. When a voltage is applied, the anode generates an electric field in the electrolyte which is inside in the cathode, and a dielectric is formed on the anode surface. This forms a metal-oxide-electrolyte interface which induces a high capacitance value.Furthermore, in order to maintain the capacitance of the UPX1A102MHD aluminum electrolytic capacitor, a temperature sensing circuit is employed. This circuit consists of a temperature sensor, such as a thermistor, a varistor, and a temperature compensation circuit. When the temperature of the electrolytic capacitor rises, the value of the electrolyte resistance increases due to the increased thermal expansion of the electrolyte. This causes the dielectric height to decrease, resulting in an increase in the leakage current. The temperature sensing circuit is used to react to these temperature changes and thus to maintain the capacitance of the capacitor.ConclusionThe UPX1A102MHD aluminum electrolytic capacitor is a highly reliable and affordable component which is commonly used in a variety of applications. Its wide application fields includes power electronics, telecommunications, wireless communication, digital electronics, electronic subsumption, semiconductor test equipment, and aerospace systems. Its excellent performance mainly based on its working principle which is the formation of an electric field in the electrolyte and a dielectric on the anode surface which forms a metal-oxide-electrolyte interface and thus induces a high capacitance. In addition, it also has a temperature sensing circuit which is activated in response to temperature changes in order to maintain the capacitance.

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