Ⅰ: Code of product series: three-digit

      154: series 154 tact switch

Ⅱ: Code of product dimension: single-digit

      1: length×width=10.2mm×0.2mm

      4: length×width=7.5mm×7.5mm

Ⅲ: Code of free position (FP): double-digit

      86: FP=8.6mm    10: FP=10mm   05: FP=5mm

Ⅳ: Code of fixed method: single-digit

      0: SMT,  type "一" terminal

      1: SMT,  type "Z"  terminal

      2: SMT,  type "V" terminal

      3: DIP,  type "S"  terminal

Ⅴ: 4-direction operating force: double-digit

      16: OF=160gf      09: OF=90gf

Ⅵ: Product life: single-digit

      1: 6M times    2: 10M times     3: 30M times

Ⅶ: Derivative code: double-digit

     00: without special items

Ⅷ: Package: single-digit

     0=plastic bag        1=shrinked plastic package

     2=tape package    3=tube  package 

     4=foam package   5=undetermined