Is electrolytic capacitor and alternative forTantalum ??

[boiler95]

hi Guys,

i have one doubt. I'm building a unipolar stepper driver. (Linistepper). It required a 10uF, 25V Tantalum Capacitors, and 2.2uF, 35V Tantalum. I'm not finding Tantalum capacitor type. Is it fine if i use a Electrolytic type ? Will i have any issues ?

Thanks and Regards,
Srivatsa

 

[chuckey]

In general Tantalum capacitors have a lower series resistance, so you can but try to see if the electrolytics are sufficiently low in impedance for the circuit to work.
Frank

 

[picgak]

generally low uf electrolitic cap has High ESR, you have to search for High quality Electrolitics if you want to use one

 

[jiripolivka]

Tantalum capacitors are also electrolytic devices; other electrolytics use aluminum as the base material.
For the application like yours, the switching process is slow so any electrolytic might work. The IC or semiconductor devices used in the driver may be sensitive to a leakage, this is why tantalum capacitors are often preferred.