277LBB400M2CG

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.850" (47.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	2.8224A @ 10kHz
Ripple Current @ Low Frequency:	1.92A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LBB
Operating Temperature:	-40°C ~ 85°C
Lifetime @ Temp.:	3000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	921.04 mOhm @ 120Hz
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	270µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are widely used in power supply circuits, audio equipment, instrumentation, and other electronic equipment. They are made up of two conducting plates that are separated by an electrolyte. One plate is an anode and the other is a cathode. The external layer of the capacitor is made of aluminum foil that acts as an electrolyte to separate the two plates. The electrolyte is then impregnated into the electrodes.Aluminum electrolytic capacitors are divided into two types, ventilated and non-ventilated. The ventilated type has a vent to allow air to flow into the capacitor, reducing the chance of an explosion from overheating. Non-ventilated capacitors have no vents in their design and are typically used in smaller areas. The characteristics of aluminum electrolytic capacitors depend on the size and type of electrolyte used. Generally, larger aluminum electrolytic capacitors have higher capacitances than smaller ones and can store more charge. The electrolyte used affects the working temperature and leakage current of the capacitor. For instance, polypropylene dielectric electrolytic capacitors have a high working temperature and are suitable for applications like DC-DC converters that require a wide temperature range. Aluminum electrolytic capacitors come in various shapes, such as cylindrical, disc, button, and screw-terminal configurations, and have a wide variety of capacitance values ranging from microfarads to milli-farads. Leakage current and ESR (Equivalent Series Resistance) values vary depending on the dielectric material used, the size of the capacitor, the type of electrolyte, and the working temperature.

277LBB400M2CG Application Field and Working Principle

The 277LBB400M2CG is a miniature, 35 mV mini aluminum electrolytic capacitor by Rubycon Corporation. It has a 7mm diameter body and is 0.6 inches (15.24 mm) in length. Its rated voltage is 10V and capacitance 400mF with a tolerance of ±10%. It has a 27 VDC rated working voltage with a 0.07 ohm ESR as well as a 0.00030 lA leakage current. Due to its relatively low ESR and leakage current, it is suitable for use in high-frequency switching power supplies and low ESR filter circuits. The 277LBB400M2CG has two metal foil electrodes and a liquid electrolyte for the dielectric between them. The two electrodes are connected by terminals to form a capacitor. One of the plates is charged positively and the other is charged negatively, similar to a rechargeable battery. When a voltage is applied across the two plates, the electrolyte creates an electric field that builds up and stores energy.The 277LBB400M2CG is designed for switching applications such as power converters, DC/DC converters, low-ESR circuits, and other switching power supplies. It has a high ripple current rating and low equivalent series resistance (ESR) to reduce high frequency noise. The capacitor’s temperature range is -55°C to +105°C, making it ideal for applications in a wide temperature range.In conclusion, the 277LBB400M2CG is a miniature aluminum electrolytic capacitor, designed for use in harsh environments and with high frequency switching power supplies. It is ideal for use in systems that require low ESR and low leakage current. This makes it an excellent choice for DC/DC converters, switching power supplies, and other high-frequency applications.

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