Swich Basics and Applicaions Selecion Service Speed
Inroducion Basic Swich Types and Applicaions Swich Funcion - Mechanical Poles and Throws, Mechanical Characerisics Swich Funcion - Elecrical Volage and Curren Raings, Conac Resisance Process Applicaions Hand Solder, Wave Solder, SMT Selecion Service Speed
Basic Swich Types Push-Buon and Toggle Swiches Power Swiches Slide Swiches Roary Swiches Key Lock Swiches Tac Swiches and Domes Selecion Service Speed
Tac Swiches and Domes TYPICAL APPLICATIONS Low power, miniaure devices, digial swiching - pda s, cell phones ec. Tacile operaor feedback required- swich confirmaion, fel click when he swich is depressed Long life ypically required, SMT and wash igh capabiliy Selecion Service Speed
Push-buon and Toggle Swiches TYPICAL APPLICATIONS Medium power, bench-size devices, analog swiching - audio, measuremen equipmen ec. Mechanical laching operaion and Agency Approvals opion Design ypically has subsanial amoun of self-cleaning capabiliy due o conac wipe acion Selecion Service Speed
Power Swiches TYPICAL APPLICATIONS High power, on-off swiching, consumer, indusrial - audio, measuremen equipmen ec. Mechanical laching operaion ypical, indicaor lighing opion Mos are snap acion ype consrucion, wih minimal conac wipe Agency approvals required (UL, CSA, CE ec.) Selecion Service Speed
Slide Swiches TYPICAL APPLICATIONS Low power, on-off swiching, consumer, indusrial - audio, measuremen equipmen, oys, low-cos applicaions ec. Self cleaning conacs due o wiping acion (ypically) Unique swiching conac groups available Selecion Service Speed
Roary Swiches TYPICAL APPLICATIONS Low power, on-off swiching, digial, indusrial - audio, measuremen equipmen ec. Several conac groupings available, up o 4 poles Self cleaning conacs, due o wiping acion Selecion Service Speed
Key Lock Swiches TYPICAL APPLICATIONS High power, on-off swiching, consumer, indusrial - safey lock- ou capabiliy Muliple posiions available Mos are sliding acion ype consrucion, wih subsanial conac wipe Agency approvals available (UL, CSA, CE ec.) Selecion Service Speed
Swich Funcion Mechanical Swich Consrucion - Poles and Throws Mos Common Single Pole - Single Throw, Single Pole - Double Throw Double Pole - Single Throw Double Pole - Double Throw Selecion Service Speed
Swich Funcion Mechanical FORCE / DEFLECTION CURVE - Tac or Dome Selecion Service Speed
Swich Funcion Mechanical FORCE / DEFLECTION CURVE - Push Buon Selecion Service Speed
Swich Funcion Mechanical FORCE / DEFLECTION CURVE Snap Acion Selecion Service Speed
Swich Funcion Elecrical CONTACT RATING Vols AC or Vols DC - measured in VAC or VDC Curren Raing - measured in milliamps or amps Elecrical Life (cycles under load) Conac Resisance - milli-ohm measuremen Conac Maerial - gold or silver (ypically alloyed) Selecion Service Speed
Swich Funcion Elecrical INSULATION RATING Insulaion Resisance - Meg-ohms Dielecric Wihsanding - Vols AC or DC (Dielecric Wihsanding) - High-po Selecion Service Speed
Process Applicaions HAND SOLDER 15-30 wa solder iron ypical Typical solder iron ip emperaure 650-700 F Typical so lder dwell ime - 3 seconds No-clean fluxes generally used, if no, cleaning is required (boom-side only) Selecion Service Speed
Process Applicaions WAVE SOLDER Typical solder emperaure - 500 F. (260 C.) Typical solder dwell ime - 3 seconds Typical bel speed - 20 inches/minue Typical prehea emperaure - 266 F. (130 C.) OA (organic acid) waer wash fluxes generally used Waer wash or hand cleaning required Selecion Service Speed
Process Applicaions TYPICAL WAVE SOLDER EQUIPMENT WAVE ZONES (3) FLUX PREHEAT WAVE SOLDER Selecion Service Speed
Process Applicaions SMT Typical max emp - 464 F (240 C) Typical bel speed - 20 inches/minue No-clean or OA fluxes ypically used SOLDER PRINT PICK & PLACE SOLDER REFLOW Selecion Service Speed
Process Applicaions SMT TYPICAL SOLDER REFLOW PROFILE Selecion Service Speed
Process Applicaions SMT TYPICAL SOLDER REFLOW PASTE Sn/Ag/Cu - ( in, silver, copper ) 95.5/3.9/0.6 - Solid 216 C / Liquid 217 C (422 F) (Sn/Pb 63/37) Solid 182 C / Liquid 183 C (362 F) Selecion Service Speed
Process Applicaions TYPICAL WATER WASH (high-pressure waer) Requires WASH SEALED swich, ypical wash emp - 150 F Typical Zones -- PREWASH -- WASH -- WASH -- RINSE -- DRY Selecion Service Speed
Basic Swich Caegories Non-Sealed No Special Consrucion To Seal Swich Flux Resisan Typically Epoxy or RTV Used To Seal Terminals Wash Tigh Swich Consrucion Specifically Designed To Allow Machine Washing Selecion Service Speed
Swich Types Non-Sealed NO SPECIAL SWITCH CONSTRUCTION TO PREVENT FLUID ENTRY Selecion Service Speed
Swich Types Flux Resisan TERMINALS SEALED WITH EPOXY TO PREVENT FLUX ENTRY Selecion Service Speed
Swich Types Wash Tigh (TL6700, TL6100, TL6110, TL6120, 100A, 200A, 200B, 300A, 400A) SWITCH SPECIFICALLY DESIGNED TO PREVENT WASH WATER ENTRY Noe : Wash Tigh is NOT he same as WATERPROOF. Wash Tigh is inended o provide proecion from waer enry ino he swich, under reasonable wash condiions. The abiliy of he swich o pass his crieria is based upon es daa from he MIL-STD-202E Heaed Fluorocarbon Immersion Tes. This es canno guaranee performance in all wash condiions, due o he wide range of varying machine condiions. Our esing indicaes 40 PSIG wash pressure can be oleraed. Selecion Service Speed
Seal Tes Sandards IP 40 (sealed agains solid objecs > 1mm dia.) IP 50 (dusproeced) IP54 (dus proeced / splashing waer proeced) IP 60 (dusigh) IP 64 (dus igh / splashing waerproeced) IP 65 (dus igh / waer jeproeced) IP 67 (dus igh / waer immersionproeced) Selecion Service Speed
Seal Tes Sandards MIL-Sd-883C Mehod 1011 Tes Condiion A Immersion in a +100 degree C. waer bah -- 5 minues Immediaely ransfer o 0 degree C. waer bah -- 5 minues REPEAT ABOVE 10 CYCLES Measure Insulaion Resisance Before and Afer Immersion Disassemble Swich Afer and Examine For Evidence of Waer * Desrucive Tes (Mos suied for design and R&D) Selecion Service Speed
Seal Tes Sandards MIL-Sd-202E Mehod 112 Tes Condiion D Immersion in a Fluorocarbon Liquid a +125 C for 20 Seconds (noe : a lower emp. (max. emp. he swich is raed for) may be necessary A Seady Sream of Bubbles From The Swich Indicaes a Leak * Preferred Tes Mehod (Non-Desrucive, mos suiable for producion esing) Selecion Service Speed
Process Sealed Benefis Swich Processed Normally Wih Oher Sandard Componens (SIGNIFICANT COST-REDUCTION DUE TO REDUCED HANDLING AND TIME) Enhanced Conac Reliabiliy Due To Sealing (LONG-TERM CONTACT PERFORMANCE BENEFIT) Selecion Service Speed
Seal Tesing Preferred Mehod - Heaed Fluoriner Bah HEATED FLUORINERT LIQUID MIL-Sd-202E Mehod 112 Tes Condiion D A Fluoriner liquid bah is heaed o 125 degrees C., or he swich maximum operaing emperaure, (usually 85 degrees C.). The device under es is lowered ino he heaed bah, causing he rapped air inside he device o expand. Any subsanial leak pah can hen be readily idenified by a sream of bubbles escaping from he swich body. The sandard es ime is 60 seconds, bu may be reduced o 30 seconds for high-volume producion esing, as failures ypically occur wihin 15-20 seconds afer submersion. Passing of his es resuls in a swich ha will mee mos solder and wash processes, bu unique wash circumsances will sill prevail, and can lead o swich failures, such as exreme wash pressures, emperaures, hermal shock, ec. Correlaion beween he es and he acual wash process may be required. Selecion Service Speed
Swich Glossary of Terms Selecion Service Speed
Swich Glossary of Terms Selecion Service Speed