pushbutton switches c ompact p ushbuttons p8 70 otto 2007 full line catalog specifications subject to change without notice makes and breaks every time! ottos inherent rocking-action breaks welds and wipes contacts clean. o tto p8 series pushbutton switches feature a shortened back-of-panel depth while offering all the features of the regular size p1 and p3 series switches. p8 series switches offer vastly improved electrical and mechanical life under extreme conditions found in most military and industrial environments. on sealed models, a silicone boot operating on our patented rolling sleeve principle protects the contact area against contamination at the button area. this boot provides long life and smooth operation over a wide temperature range. sealed terminals protect the contact area from hostile environments and solder flux on both sealed and unsealed models. high contact pressure (120 grams), low contact resistance (25 milliohms) and short contact bounce (5 milliseconds max.) are the result of our patented snap-action mechanism. these characteristics guarantee exceptional current carrying capabilities over the life of the switch. with the optional low level (gold plated) configuration the p8 is well suited to interface directly to computers and other solid state devices. the otto p8 series is a quality precision snap-action switch designed for use in panel boards, control sticks, computers, instruments, pressure switches and other hand or machine operated applications where rugged pushbutton switches are required. in addition, its precision permits the otto p8 to also be used as a limit switch. the p8 offers unique size, high electrical ratings and a wide c hoice of mounting styles. quality features: ? s ho rter behind panel depth than ottos p1/p3 ? patented rolling sleeve button seal ? contact area sealed at button and terminals ? p os itiv e tactile feedback ? less than 25 milliohms contact resistance ? ideal for low level as well as 20 amp. switching ? trip point repeatable to within .001" ? v a riety of mounting styles ? variety of button lengths & shapes ? engraved buttons and bezels available ? mec ha n i cal life is over 1 million cycles ? ul recognized ? shorter behind panel, subminiature double-break, snap-action st a ndard characteristics/ratings: e l e c trical circuit: b e c ause the otto p8 is a double-break, two-circuit switch, it can operate a s a s ingle or two circuit device. thus, a wide variety of connection possibilities are available. s e e circuit form in part number code for options. special variations can be provided. e le c t rical: (a t 2 8 v dc or 115 vac, 60/400 hz.) l o a d amperes life (min.) r e s i s t iv e 10 100,000 cycles r e s i s t iv e 2 0 25,000 cycles inductive 5 100,000 cycles la m p 3 100,000 cycles operational: mechanical life: 1,000,000 cycles minimum temperature range: -55c to +85c seal options: unsealed, moistureproof and dusttight (ip64 & mil-prf-8805 design 2), watertight (ip68) operating force: 2.5, +0.5, -1 lb. release force: 1 lb. minimum materials: case: aluminum, anodized black or clear button: thermoplastic boot: internal, silicone rubber t e rminals: b r ass, silver plated contacts: fine silver mounting: models with threaded bushing mount supplied with hex nut and internal tooth lockwasher. panel seal gasket supplied for splash-proof. model p8-1 style press fits into a .623" diameter hole. terminals: terminal options include solder, faston or screw connection with optional 2-56 x 1/8" screws, split lockwashers and solder lugs. us patent no. 3,612,793. canadian pat. no. 917,719.
pushbutton switches c ompact p ushbuttons p8 specifications subject to change without notice www.ottoexcellence.com 71 p u s h b u t t o n s p8-1, style a bezel press fit bushing f lat button shape shown specify dia.: .312" or .375" height: .187" or .250" p 8-3, style c bezel . 625-24 bushing f lat button shape shown specify dia.: .312" or .375" height: .187" or .250" p8-6, style f bezel .625-24 bushing f lat button shape shown specify dia.: .312" or .375" height: .187" or .250" p8- 7 , style g bezel .625-24 bushing f l a t b utton shape shown s p e cify dia.: .312" or .375" h e i ght: .187" or .250" p8-8, style h bezel .6 2 5-2 4 b ush i n g flat button shape shown specify dia.: .312" or .375" height: .187" or .250" terminal styles "a" (in.) 1 , 2, 4 & 5 .810 3 & 6.924 t e r minal styles "a" (in.) 1 , 2, 4 & 5 .808 3 & 6 . 9 22 small bushing p8-4: .500-32 bushing p8-5: .469-32 bushing flat button shape shown specify dia.: .312" or .375" h eight: .187" or .250" dome b u t t o n s ha pe specify dia.: .312" or .375" height: .187" or .250" p ush-p u l l button shape available as button style p only m odel terminal styles "a" (in.) p8-4 1, 2, 4 & 5 .870 3 & 6.984 p 8-5 1 ,2,4 & 5 1.097 3 & 61.211 terminal styles "a" (in.) 1,2,4 & 5 .683 3 & 6 . 797 terminal styles "a" (in.) 1,2,4 & 5 .683 3 & 6.797 terminal styles "a" (in.) 1 , 2 , 4 & 5 .808 3 & 6.922 p8 p ar t number code p8- x x x x x x x bezel terminal style/ circuit current rating level/ operating button button diameter/ st yle case color form seal type force/action color length/shape 1. style a 0. special 1. n.o. 1. standard/unsealed 1. 2.5 lbs/momentary 1. red a. .375"/.250"/flat 3. style c 1. solder/silver 2. n.c. 2. standard/moistureproof 2. 4 lbs/momentary 2. black b. . 375"/.250"/dome 4. . 5 0-32t hd 2. s c r e w/s ilver 6. t w o c i r cuit 3. sta n d a r d/watertight 3. p u s h-p u ll 3. o r a n g e c . . 3 7 5"/. 1 8 7"/flat 5 . . 4 69-32thd 3. f a ston/silver 4. l o w level/moistureproof 4. y e llow d . . 3 75"/.187"/dome 6. style f 4. solder/black 5. low level/watertight 5. green e. .312"/.250"/flat 7 . st yl e g 5 . s c r e w/b l a c k 6. sta n d a r d/d u s ttight 6. b l u e f . . 3 1 2"/.25 0"/d o m e 8. style h 6. faston/black 7. purple g. .312"/.187"/flat 8. gray h. .312"/.187"/dome 9. white p. 375"/.250"/flat ordering information: select the otto p8 series switch to match your application requirements. combinations of features are almost limitless. when ordering, please use the otto part number. ex am p l e of b u ilding an otto part number: p8-316329b specifies a "c" style bezel, silver color case, solder terminals, two- circuit contact configuration, standard c o nta c t rating, watertight seal construction, 4 lbs. operating force momentary action, white button .375" diameter by .250" long, dome shaped. for low level switching option, specify p8-316 5 29b. specials are serialized. subsequent numerals do not specify standard features. f aston receptacles: .187" on n.o.; .110" on n.c. terminals. push-pull action available in button style "p" only. u n sealed units are not recommended for low level current duty. low level to 10 amps, commercial grade conforms to mil-s-8805/20
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