https://www.allclaveparts.com/autoclave-parts/tuttnauer-174/3870-series/3870m-autoclave-parts/3870m-door-switch
3870M DOOR SWITCH [TUS014-2247] - $39.97 :
3870M DOOR SWITCH [TUS014-2247] - Part #TUS014-2247 Tuttnauer Part #01910190 DOOR SWITCH 15A @ 125-250V Includes all parts as shown 1/4" quick connect tabs...
door switch