In the past "Capital Protected" products have not given any great returns, in the international markets (Same rule must apply to Indian markets also)
At the end of tenor, normally you get back your capital and if lucky some meagre returns.
Such funds cannot match equity returns, simply because of the charter of such funds, which allows 10-15% only to be invested in equities.
They operate like this:
Suppose Rs100 invested in 3 years capital protected fund.
90 will be invested on day one in fixed interest bearing security for 3 years, which may yield 10 in three years. Hence 100 capital is protected after three years.
Balance 10 will be put on speculation by buying highly volatile and highly leveraged options or leaps for some outstanding returns.
If the fund manager is successful on this 10 speculation, then the return on 100 improves somewhat.
Otherwise 100 is protected.