series 57 m m e t a l flex-tech miniature panel sealed metal pushbutton switches the 57m is a miniature, rugged vandal resistant switch. the housing is zinc alloy with velour chrome plating. it is available as maintained or momentary action and illuminated and non-illuminated versions. electro-mechanical operation with gold plated contacts and solder terminals. it is ideal for a multitude of applications. key features zinc alloy/velour chrome plated centre spot led and non lighted versions momentary or maintained action panel sealed to ip67 rohs compliant electro-mechanical gold plated contacts and terminals typical applications security equipment industrial control medical equipment military equipment food processing transportation computers s n a p a c t i o n c u s t o m a s s e m b l i e s p u s h b u t t o n s e a l e d r o c k e r i n d i c at o r s l i d e va n d a l r e s i s ta n t i l l u m i n at e d a c t i v e t o u c h standards / agency / ratings patent # 6,965,085
mechanical/electrical characteristics: circuit spst-no-db button travel (nominal) 2.3mm life (mechanical): 500,000 cycles max (momentary) 100,000 cycles max (maintained) operating force (nominal) 3n/306g contact bounce (nominal) 1 ms panel thickness 0.5 - 3mm temperature (operating) -40c to +85c torque (max) (fixing nut) 1-2 newtons metre electro-mechanical current ratings 10ma, 12 vdc res.* dielectric strength 1,000 vac insulation resistance 1g ohm contact resistance 50m ohms max (initial) *current limiting resistor is required to limit led forward current to 20 ma (not included) . ordering information switch housing function material illumination led colour 1. mechanical, momentary, solder terminal 1. zinc alloy, velour 0. non-illuminated n. none 2. mechanical, maintained, solder terminal chrome plated 1. centre spot illumination g. green led 9. special, following digits are in serial order 2. zinc alloy, black r. green led chrome plated a. amber led b. blue led w. white led itw switches limited norway road, portsmouth, hampshire po3 5ht united kingdom tel: 023 9265 6200 fax: 023 9266 6352 email: info@itwswitches.co.uk www.itwswitches.co.uk 57m- dbd/3m/2.08 panel mounting and construction information the series 57m mounts easily into panels of minimum 0.5 mm and maximum 3 mm thickness. front panel sealing to ip67 is achieved by a sealing washer fitted to the body of the switch before it is inserted into the panel hole cut-out. it is held onto the panel by means of a brass hex nut tightened down to a torque of 1-2 newton metre to achieve the correct sealing pressure . series 57 m flex-tech miniature panel sealed metal pushbutton - + g o - + g o 3.5 5.59 0.51 (2) 3.7 2 2.1 19.3 22.1 19.3 2 0.5 led terminals switch
terminals hex nut sealing washer m16 x 1-6g thread positive (+)
lamp terminal negative (-)
lamp terminal 2 .8 (2) ? 12.4 ?18.5 ?3.5 button housing centre spot
illumination
b utton
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