# 5.5V Coin Type Supercapacitor for RTC and Memory Backup Circuits
RTC and memory backup circuits usually require a compact and stable backup component. When the main power is off, the circuit may still need to keep time information, device settings or basic stored data. A 5.5V coin type supercapacitor is a practical option for many low-power backup designs.
## Buyer concern
For engineering buyers, the biggest concern is whether the backup time is enough and whether leakage current will shorten standby performance. A low leakage supercapacitor is especially important for RTC backup and memory backup applications where the circuit may remain in standby mode for a long time.
## Typical model range
LORIDA supplies 5.5V coin type supercapacitors from 0.1F to 4F. Small capacitance models such as 0.1F and 0.22F are often used for small RTC backup circuits. 0.47F, 1F and 1.5F models are commonly selected when longer backup time is required. 4F can be considered when the design needs higher capacitance within the available space.
## What to confirm
To choose the right RTC backup supercapacitor, confirm rated voltage, capacitance, load current, expected backup time, diameter, height and lead type. If the PCB has already been designed, lead pitch and mounting direction must also be checked carefully.
## Replacement support
If you are replacing an existing memory backup capacitor, send the original part number, datasheet or sample photo. LORIDA can help check whether a 5.5V supercapacitor replacement model is available and whether sample testing should be arranged before bulk order.
## Need Support?
Looking for a supercapacitor for RTC circuit backup? Send us your load current, backup time and PCB space. LORIDA will recommend a suitable model for testing.
