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Part1:Precautions For The Use Of Aluminum Electrolytic Capacitors

Date: 2019-05-09
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1 Considerations In Circuit Design

(1) Designed In The Range Of The Rated Performance Of The Capacitor Specified In The Product Catalog Or The Specification Approval Application (Hereinafter Referred To As The Delivery Approval) Of The Capacitor, Based On The Confirmation Of The Use Environment And The Installation Environment.

(2) The Temperature Of Use And The Ripple Current Used Shall Not Exceed The Limits Specified In The Catalog Or Delivery Acknowledgement.

1 Do Not Use At Temperatures Above The Upper Limit Temperature (Maximum Operating Temperature).

2 No Current Can Be Connected (Current Exceeding The Rated Ripple Current).

(3) When Designing The Circuit, Use A Capacitor That Matches The Life Of The Machine.

(4) The Capacitor Is A Polar Capacitor. Be Sure To Connect The Reverse Voltage Or AC Voltage. Use A Bipolar Polarity Capacitor In The Polarity Reversal Circuit. However, Bipolar Capacitors Cannot Be Used In AC Circuits.

(5) Select A Capacitor That Matches The Conditions Of Use In The Circuit That Repeats The Rapid Charge And Discharge. As A Circuit That Repeats Rapid Charging And Discharging, Such As An Electric Welder, A Camera Flash, And The Like. In Addition, The Control Circuit Of A Rotating Machine Such As A Servo Motor With A Large Fluctuation In Circuit Voltage Repeats Rapid Charge And Discharge. For Repeating The Capacitor Used In The Rapid Charge And Discharge Circuit, Please Contact Us.

(6) Please Confirm That There Is No Excess Voltage (Voltage Exceeding The Rated Voltage) Through The Capacitor.

1 Note That The Peak Value When The Ripple Voltage (AC Part) Overlaps With The DC Voltage Cannot Exceed The Rated Voltage.

2 When Two Or More Capacitors Are Connected In Series, The Voltage Passing Through Each Capacitor Should Be Controlled Below The Rated Voltage. Further, At This Time, A Voltage Dividing Resistor In Consideration Of The Leakage Current Is Added In Parallel With Each Capacitor.

(7) The Capacitor Should Be Completely Isolated From The Circuit Between The Following.

(The Aluminum Oxide And Cathode Terminals Of The Capacitor Are Connected By The Natural Oxide Film On The Inside Of The Case And The Unstable Resistance Part Of The Electrolyte)

1 Between The Aluminum Shell And The Cathode Terminal (Except For The Reverse Of The Lead Terminal) And Between The Anode Terminal And The Circuit Board.

2 Substrate Between The Self-Standing Blank Terminal And Other Anode Terminals And Between The Cathode Terminal And The Circuit Board.

3 Between The Two Terminals Of The Bipolar Capacitor And The Aluminum Case.

(8) The Package Sleeve Of The Capacitor Is Not Insulated To Ensure Shape. Do Not Use In Places Where Insulation Is Required. Please Consult Us If You Need A Jacket With Insulation.

(9) Capacitors May Sometimes Malfunction If They Are Used In The Following Environments.

1 Ambient (Weather Resistance) Conditions

(A) Direct Splashing Environment, High Temperature And High Humidity Environment And Dew Condensation Environment (B) Direct Splashing Environment And Oil Mist Filled Environment

(C) Direct Splashing Of Salt Water And A Salt-Filled Environment

(D) Environments Filled With Toxic Gases (Hydrogen Sulfide, Sulfurous Acid, Chlorine, Bromine, Methyl Bromide, Ammonia, Etc.) (E) Environments With Direct Sunlight, Ozone, Ultraviolet Light And Radiation

(F) An Environment In Which Acidic And Alkaline Solvents Are Splashed

2 Harsh Or Shock Conditions Exceed The Harsh Environment Specified In The Delivery Acknowledgment

(10) When Mounting The Capacitor On A Printed Circuit Board, Please Confirm The Following Beforehand And Design.

1 Align The Hole Spacing Of The Printed Circuit Board With The Terminal Spacing Of The Capacitor.

2 The Wiring And Circuit Board Should Not Be Placed Close To The Pressure Valve Part Of The Capacitor During Design.

3 As Long As There Is No Provision In The Delivery Confirmation, The Interval Of The Pressure Valve Part Of The Capacitor Shall Be As Follows. Product Diameter Interval

Φ8 ~ Φ16mm 2mm Or More

Φ18 ~ Φ35mm 3mm Or More


1 When The Pressure Valve Of The Capacitor Is Installed On One Side Of The Printed Circuit Board, Please Align The Position Of The Pressure Valve And Open The Vent Hole When The Pressure Valve Is Working.

2 Place The Screw Terminal-Shaped Sealing Part Up. Also, When Placing It Horizontally, Place The Anode Terminal Up.

(11) If There Is A Template On The Lower Surface Of The Capacitor Sealing Part, If The Electrolyte Leaks, The Circuit May Be Short-Circuited, Causing Leakage Or Migration. Therefore, Do Not Route The Circuit Board Under The Capacitor Sealing Part.

(12) Do Not Place Heat-Generating Parts Around The Capacitor And On The Back Side Of The Printed Circuit Board (Below The Capacitor).

(13) The Pad Pattern Of The Printed Circuit Board For Chip Capacitors Should Be Designed With Reference To The Recommended Pattern Of The Product Catalog Or Delivery Approval.

(14) The Electrical Characteristics Of The Capacitor Vary Depending On Changes In Temperature And Frequency. Please Design The Circuit Based On The Confirmation Of The Change.

(15) When Mounting A Capacitor On A Double-Sided Printed Circuit Board, When Designing The Circuit, Design The Circuit So That There Are No Excess Printed Circuit Board Holes And Through-Holes For Connecting The Front And Back Sides Of The Capacitor.

(16) The Tightening Torque Of The Screw Terminal And The Tightening Torque Of The Capacitor For The Subject Installation Shall Not Exceed The Range Specified In The Delivery Confirmation.

(17) When Two Or More Capacitors Are Connected In Parallel, It Is Necessary To Fully Consider The Current Balance.

(18) When Connecting Two Or More Capacitors In Series, Consider The Voltage Balance And Insert The Voltage Divider Resistor In Parallel With The Capacitor.

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