GuangDong TOPAZ Electronic Technology Co., Ltd. - Aluminum Electrolytic Capacitor Guidelines

This document provides essential guidelines for the optimal performance and extended lifespan of Aluminum Electrolytic Capacitors manufactured by GuangDong TOPAZ Electronic Technology Co., Ltd. It covers critical usage considerations, from polarity and voltage ratings to temperature, frequency, and handling during soldering and storage.

Product Attributes

Brand: TOPAZ
Origin: Guangdong, China
Product Type: Aluminum Electrolytic Capacitors

Technical Specifications

Item	Description
Polarity	DC electrolytic capacitors are polarized. Ensure correct polarity to prevent short circuits or damage. Use bipolar capacitors for uncertain polarity. Not suitable for AC applications.
Bipolar Capacitors	Suitable for pulse and polarity reverse circuits. Not applicable for pure AC or high ripple current circuits.
Voltage Rating	Do not exceed rated voltage. Recommended working voltage is 70-80% of rated voltage for extended life.
Ripple Current	Do not allow ripple current to exceed permissible limits (generally not more than 80% of rated current) to prevent overheating, capacitance reduction, and damage.
Charge/Discharge Circuits	Use specially designed capacitors for circuits with rapid charge and discharge cycles to prevent damage, capacitance decrease, and heat rise.
Operating Temperature	Capacitor characteristics vary with temperature. Lower temperatures ensure longer life.
Temperature and Life Relationship	Life is generally doubled for every 10 decrease in temperature from the rated temperature. Formula provided for calculation: Ls = L0 * 2^((T0-Tx)/10) * sqrt((I0/Ix)*(Tm-Tx)/(Tm-T0)) where L0 is useful life at rated ripple current I0 and max operating temperature T0; Tx is actual operating temperature; Ix is actual ripple current; Tm is max operating temperature. (Note: The provided formula in the source text appears to have some formatting issues and might require further clarification for precise calculation.)
Operating Frequency	Capacitance is typically measured at 100Hz or 120Hz. Capacitance decreases and tg increases with higher frequencies, leading to increased ambient temperature.
Storage	For capacitors stored for a long time, apply rated DC voltage gradually before use. Storage may increase leakage current and decrease withstand voltage.
Case Insulation	The capacitor case is not insulated from the cathode terminal. Insulation measures are required at the mounting point if case insulation is necessary.
Terminal/Lead Force	Do not apply excessive force to terminals and leads to prevent breakage, separation, or internal connection failure.
Bending Leads	Maintain a 2mm safe spacing between the bend and the capacitor body when bending leads for horizontal mounting to prevent internal structural damage.
Circuit Board Cleaning	Use recommended solvents (Methanol, Isopropanol, Ethanol, Isobutanol, Petroleum Ether, Propanol, detergents) for cleaning. Avoid halogenated solvents (trichloroethylene, xylene, acetone) to protect sleeve, marking, and sealing materials.
Soldering	Keep soldering irons away from plastic sleeves. Recommended soldering temperature is within 260 for no more than 10 seconds to avoid damaging the capacitor unit.
PCB Hole Layout	Ensure mounting hole spacing equals lead spacing to avoid stress on leads. Carefully consider hole layout to prevent solder splashing onto the vinyl sleeve.

2304140030_Guangdong-TOPAZ-Elec-Tech-ECRE0611101M016P00_C156877.pdf

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