features ? insert moulded terminals ?fully sealed base ? fully sealed version ?to ip67 ? wide temperature range -40? to +125? ? choice of actuators as standard ? approved product beab ? soldering information ?350 max. for 3 seconds ? non flammable switch ?ul94-vo rated non-standard options ? leaf lever available in variable lengths (see ordering information) ? custom levers/brackets ? multiple pole ?anged versions data sheet no. 19n500 series 19n ?microswitch series 19n e 4 page (11114) 27 07 2000 5:30 pm page 2
technical information series 19n the miniature microswitch (the standard v4 size) has been designed in line with similar competitive products, but because of automation, offers consistent high quality levels for volume applications, at no extra cost. the switch mechanism used is the well proven spring and blade method, and is offered in a choice of operating forces. other standard options include gold or silver contacts; pcb, solder or qc terminals, and integral wire lead versions. all versions have a fully sealed base right up to the bottom opening. in addition, sealed button versions are totally environmentally sealed. mechanical overtravel 0,2mm (min) depress to case movement differential 0,1mm reference mechanical life 10,000,000 cycles operating force see ordering information environmental & physical ingress protection e with unsealed button ip40 e with sealed button ip67 temperature -40?c to +125?c button material polyester body material nylon 46 contacts e silver versions silver nickel alloy e gold versions 5 microns of gold on copper/nickel terminals e solder & pcb versions tin plated brass e qc versions brass electrical (at 125?c) current (max) for silver contact versions (inductive rating 0,6 pf) low operating force: standard operating force: 250v a.c. resistive 2a 250v a.c. resistive 5a 250v a.c. inductive 1a 250v a.c. inductive 1a 28v d.c. resistive 2,5a 28v d.c. resistive 3a 28v d.c. inductive 1a 28v d.c. inductive 1a all gold contact versions: 100ma 28 vdc resistive current (min) all silver contact versions 10ma 5v d.c. resistive all gold contact versions 1ma 5v d.c. resistive life (nominal) e full load 100,000 cycles dielectric strength 1000v a.c. insulation resistance 1g contact resistance (initial) 20m (max) silver, 50m (max) gold contact bounce 5ms (max), 1ms per individual pulse approvals series 19n C 4 page (11114) 27 07 2000 5:30 pm page 3
technical information ordering information sealed variants this variant is available in two versions, fully sealed and top sealed. the top seal incorporates a rubber seal around the button to stop the ingress of contaminants through this area. if the switch is to be activated by a cam, it would be advisable to do this via a lever, as using a cam directly onto the button can cause damage to the diaphragm seal. the fully sealed version has the top seal and also has integral leads ?potted? onto the terminals. this version is rated at 125?c. there is also a derated version, to 105?c, available. this has the advantage of being lower cost than the standard version. if you should require more information on this version please contact the sales office. note * l18 represents that this lever is 18mm long (see product drawing). non standard leaf lever lengths are available in 1mm increments from 18mm to 63mm. you may specify required lever length from between 18mm to 63mm as a non standard option. if required, please reference the sales office. mounting information pcb terminal version this version mounts directly onto a pcb which has been drilled as illustrated. to ensure a tight fit in the pcb during handling and flow soldering operations, the switch can be inserted into the pcb, and then the terminals may be splayed by 30? in an alternate fashion. the terminals have an in-line rectangular cross section to facilitate this, and to eliminate the reduction of creepage distances in the fitted application. solder, qc and flying lead versions these versions have two mounting holes that accept m2,5 screws (with anti-vibration washers if relevant) tightened to a maximum torque of 0,3nm. one of the mounting holes is slotted, to allow for a tolerance between the screw centres of 0,15mm. if the switch is being mounted onto a metal surface, a separating insulator is recommended on the solder and qc versions, to ensure bare wires cannot make electrical contact. pcb layout (viewed from either side) terminal style solder 4 pcb 5 qc 6 integral wire leads 7 contact material silver 0 gold 1 button op/release force op force rel force unsealed button 0,5n 0,07n 1 sealed button 2,0n 0,27n 2 unsealed button 1,5n 0,27n 3 auxiliary actuator fitted none fitted (leave blank) standard leaf lever l18 standard roller lever r15 19n all dimensions in millimetres series 19n e 4 page (11114) 27 07 2000 5:30 pm page 4
technical information series 19n microswitch itw switches, division of itw limited, norway road, hilsea, portsmouth po3 5ht, uk t el: +44 (0)2392 6 56 20 0 f ax: +44 (0)2392 666352 w ebsite: ww w .i t w sw itch es . co .uk due to our policy of continuous product development, itw switches retain the right to change the specification at any time without prior notice. designed & printed in the uk. data sheet no. 19n500 product dimensions all dimensions in millimetres button/lever positions all dimensions in millimetres application references telephone handsets automotive controls joysticks security/anti-tamper uses small motor limit switches business machines thermostat and sensor controls further information for further information on our complete range of switch products, visit our website e www.itwswitchcon.com or contact our sales office. circuit form 2nc 3no form c c1 (red) (yellow) (blue) 0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 15 20 30 40 50 60 lever length (mm) lever operating force (n) 2,0n 1,5n 0,5n button operating force (see ordering information) graph to calculate operating force at end of lever arrow shows direction of force and point of contact free position (f.p) standard switch to mounting holes 9,14 max standard switch to pcb 12,35 max sealed switch to mounting holes 9,35 max leaf lever to mounting holes 12,50 max leaf lever to pcb 15,70 max roller lever to mounting holes 17,20 max roller lever to pcb 20,40 max operating point (o.p) standard switch to mounting holes 8,40 0,40 standard switch to pcb 11,60 0,40 sealed switch to mounting holes 8,50 0,40 leaf lever to mounting holes 10,15 1,37 leaf lever to pcb 13,38 1,37 roller lever to mounting holes 15,50 1,14 roller lever to pcb 18,25 1,14 series 19n ?4 page (11114) 27 07 2000 5:29 pm page 1
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