Switch replacement for Weller PU120 [WTCPS, WTCPT base]

Finding the correct illuminated (neon lighted) rocker switch used in the base units for the Weller WTCPS and WTCPT (also WCC100) soldering stations can be a daunting task.

Through the years, Weller has used different suppliers for this switch C&K (ITT) and Carling (621 series) switches, but finding these switches readily available is difficult. Some manufacturers have eliminated the specific model, while others require a special order with a quantity of 100 to 1,000 units.

Specifications of the switch

120 VAC at 8 A SPST (On-None-Off) 120 VAC neon illumination .187" quick disconnects for ease of replacement with existing Weller PU120 wiring

NKK switch and Cherry make 2 candidate switches.

NKK CWSB21CACF (this is DPST version) .. which works by NOT using the "2a" contact (heat shrink insulation over QC lug). Allied Electronics part number: 870-0119 Allied & NKK did not list the SPST version in the catalog. I have personally used this part for replacing a defective switch in a PU120 based unit (WTCPS) - it works fine.

Cherry LR Series ... LRA22H2BBRLN --- SPST Allied part number 908-0105 I have not used this switch, but appears that it should also work (at 97 cents - its an inexpensive trial)

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Keep the Weller stations running !

Greg w9gb

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