Ⅰ: Code of product series: three-digit

      164: series 164 rocker switch

Ⅱ: Rating: double-digit

      03: 3A   06: 6A    10: 10A

   12: 12A  16: 16A      20: 20A

Ⅲ: Circuit: single-digit

      1: 1P1T  2: 1P2T   3: 1P3T

    4: 2P1T   5: 2P2T     6: 2P3T

Ⅳ: Code of lamp: single-digit

      0: without lamp    1: with lamp     

Ⅴ: Color of button: sigle-digit

      0: transparent    1: red      2: green

      3: yellow            4: black   5: white

Ⅵ: Type of terminal: single-digit

      1: soldering terminal    2: DIP

      3: quick connect terminal

Ⅶ: Shape of button: single-digit

      0: ellipse     1: rectangle      2: square

Ⅷ: Derivative code: double-digit

      00: without derivation

Ⅸ: Type of package: single-digit

      0=plastic bag       1=shrinked plastic package

      2=tape package       3=tube package

      4=foam package      5=undetermined