Hello Jinliang,
The KMZ41 and KMZ49 share the same package type and pinout; however, they have some differences in the limiting values and characteristics. We recommend you to take a look at the datasheets (tables 4 and 6 and to check fig. 2 as well) to check if that meets your requirements.
KMZ41
KMZ49
Have a great day,
Paulina
