Datasheet > ALA8DA431DF500

ALA8DA431DF500

更新时间： 2023-12-06 20:03:39

品牌	Logo	应用领域
基美 - KEMET		/
页数	文件大小	规格书
12页	657K
描述
ALA8D, Aluminum Electrolytic, 430 uF, 20%, 500 VDC, -40/+105°C

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ALA8DA431DF500 数据手册

Snap-In Aluminum Electrolytic Capacitors – ALA8D, +105°C

Mechanical Data

Polarity & Reversed Voltage

Aluminium electrolytic capacitors manufactured for use in DC applications contain an anode foil and a cathode foil. As such,

they are polarized devices and must be connected with the +ve to the anode foil and the -ve to the cathode foil. If this were

to be reversed, then the electrolytic process that took place in forming the oxide layer on the anode would be recreated in

trying to form an oxide layer on the cathode. In forming the cathode foil in this way, heat would be generated and gas given

off within the capacitor, usually leading to catastrophic failure.

The cathode foil already possesses a thin stabilized oxide layer. This thin oxide layer is equivalent to a forming voltage

of approximately 2 V. As a result, the capacitor can withstand a voltage reversal of up to 2 V for short periods. Above this

voltage, the formation process will commence. Aluminium electrolytic capacitors can also be manufactured for use in

intermittent AC applications by using two anode foils in place of one anode and one cathode.

Mounting Position

The capacitor can be mounted upright or inclined to a horizontal position. Special attention should be taken for the safety

vent, which ensures that internal gas generated can escape when the pressure reaches a certain value due to overstress or

catastrophic failure. All mounting positions must allow the safety vent to work properly.

Insulating Resistance

≥ 100 MΩ at 100 VDC across insulating sleeve.

Voltage Proof

≥ 3,500 VDC across insulating sleeve.

≥ 2,500 VAC across insulating sleeve.

Safety Vent

A safety vent for overpressure is featured on the base (opposing end to the terminals). This is a weakened area on the

bottom of the can that is designed to relieve build-up of internal pressure due to overstress or catastrophic failure.

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

A4080_ALA8D • 8/8/2023

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