- the cost differential is negligible, but when you are buying thousands of them perhaps manufacturers sometimes make savings where they shouldn't. Thats 100% true - we're using only BTA48/800 or BTA48/600 for each unit - the most important thing is look on i2t parameter - must be higher than i2t of the protecting circuit that means that fault will start the protection - not firing your triac. The other thing is have good choke with high risetime - because energy of the short circuit can be stored on good choke until the breaker tripped... But good chokes and triacs COST money.
