- Add "R" for waterproof. Available in TFS3 & TFS4
- Add "Z" for aluminum housing. Available in TFS1, TFS3 & TFS4
- TFS5 series has TFS-504, TFS-505, TFS-506. Inside Micro-Switch is the same as TFS3 series
Note TFS-105, TFS-305,TFS-405 are press-on, press-off models