Why freads() is not getting the expected bytes?

Im trying to read file in binary mode using C, but it only stores in the buffer the first 43 characters. I want to read the file in groups of 245 bytes. It contains multicharacter bytes and also null chars. This is the content of the file in hex:

323031353037303735393036333130343739332032373231333732534e30323033323545533036303130340000000008557c0000000000693c0000000000000c0000000008557c0000000000693c0000000000000c0000000008557c0000000000693c0000000000000c00001c00001c00001c00000c00000c00000c00001c4d4e202020204942202020204f393920202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202039444b524d4144

And this is the code that I have:

char* to_hex(const char* strin) {
    char * strout = malloc(2 * strlen(strin) + 1);
    int x;

    for (x = 0; x < strlen(strin);x++){
        sprintf(&strout[x+x],"%02x", (int)(*(unsigned char*)(&strin[x])) );
    }

    strout[2 * strlen(strin)]='\0'
    return strout;
}

int main(int argc, char *argv[]) {

    FILE * pfinput = fopen("stack.bin", "rb");
    int lrec = 245;
    char* sbuff = (char *)malloc((lrec + 1) * sizeof(char));

    if (pfinput != NULL) {
        while (fread (sbuff, 1, lrec, pfinput) > 0){
            sbuff[lrec] = '\0';

            printf("len=%d hex=%s\n\n", strlen(sbuff), to_hex(sbuff) );

            // here i want to work with the string.
            // lencampo is would has a variable value depending of the loop.
            //
            // campo       = (char *)malloc((lencampo + 1) * sizeof(char));
            // memcpy(campo, &sbuff[lstart], lencampo);
            // campo[lencampo + 1]='\0';
            // sqlite3_bind_blob(statement, loffset, campo, (lencampo + 1), SQLITE_STATIC);
            // but it only inserts 43 chars too...

        }
    }

    return 0;
}

It returns the following:

len=43 hex=323031353037303735393036333130343739332032373231333732534e3032303332354553303630313034

Why it only reads 43 characters instead of 245? Do you have any alternative to do it? Thank you.