Information

17
Design and specifi cations are subject to change without notice. Ask factory for technical specifi cations before purchase and/or use.
Whenever a doubt about safety arises from this product, please contact us immediately for technical consultation.
Gold Capacitors Technical Guide
Product Type & Selection Method of Gold Capacitors
3-4 How to Select a Gold Capacitor
3-4-1 Estimated initial back-up time
Back-up time for Gold capacitors decrease with use and over time. Especially, when the applied current is large or
operating conditions are severe (e.g. high temperature).
Initial back-up time should be considered with enough margins.
Avoid setting the minimum back-up time. (Refer the life design for details)
3-4-2 Select the optimum Gold capacitor according to applied Current
Where the applied current to a Gold capacitor is large, fl ash voltage drop (IR drop) may occur when changing to
back-up mode. Therefore, the product should be selected according to operating applied current. The amount of
applied current (discharge current) has different resistance values vs. product type.
Recommend currents are shown below. (Please contact local technical support when the applied current used is
beyond the recommended range.)
Series
Maximum operating (discharge) Current
0.047F 0.1 to 0.33F 0.47 to 1.5F 3.3 to 4.7F 10F to 50F
SG, SD, SE, NF
200
µA 300µA
1mA
−−
F
200
µA 300µA 300µA −−
EL
− 300µA
1mA
−−
EN
− 10µA −−−
HW
−−
100mA 300mA 1A